Commit Graph

1190 Commits

Author SHA1 Message Date
Zhongyi Xie
f1592a06c2 run make format for PR 3838 (#3954)
Summary:
PR https://github.com/facebook/rocksdb/pull/3838 made some changes that triggers lint warnings.
Run `make format` to fix formatting as suggested by siying .
Also piggyback two changes:
1) fix singleton destruction order for windows and posix env
2) fix two clang warnings
Closes https://github.com/facebook/rocksdb/pull/3954

Differential Revision: D8272041

Pulled By: miasantreble

fbshipit-source-id: 7c4fd12bd17aac13534520de0c733328aa3c6c9f
2018-06-05 12:58:02 -07:00
Mike Kolupaev
812c7371d3 Fix performance regression in Get() for block-based tables (#3953)
Summary:
This fixes a regression in one of myrocks regression tests (readwhilewriting), introduced in 8bf555f487

This PR changes two lines of code: one of them actually fixes the observed regression, the other is a mostly unrelated small fix that I'm piggy-backing here. EDIT: Nevermind, it fixes one line. More details in inline comments.
Closes https://github.com/facebook/rocksdb/pull/3953

Differential Revision: D8270664

Pulled By: al13n321

fbshipit-source-id: a7d91e196807d1e816551591257c700f70e4ccac
2018-06-05 11:43:16 -07:00
Maysam Yabandeh
d0c38c0c8c Extend some tests to format_version=3 (#3942)
Summary:
format_version=3 changes the format of SST index. This is however not being tested currently since tests only work with the default format_version which is currently 2. The patch extends the most related tests to also test for format_version=3.
Closes https://github.com/facebook/rocksdb/pull/3942

Differential Revision: D8238413

Pulled By: maysamyabandeh

fbshipit-source-id: 915725f55753dd8e9188e802bf471c23645ad035
2018-06-04 20:13:00 -07:00
Dmitri Smirnov
f4b72d7056 Provide a way to override windows memory allocator with jemalloc for ZSTD
Summary:
Windows does not have LD_PRELOAD mechanism to override all memory allocation functions and ZSTD makes use of C-tuntime calloc. During flushes and compactions default system allocator fragments and the system slows down considerably.

For builds with jemalloc we employ an advanced ZSTD context creation API that re-directs memory allocation to jemalloc. To reduce the cost of context creation on each block we cache ZSTD context within the block based table builder while a new SST file is being built, this will help all platform builds including those w/o jemalloc. This avoids system allocator fragmentation and improves the performance.

The change does not address random reads and currently on Windows reads with ZSTD regress as compared with SNAPPY compression.
Closes https://github.com/facebook/rocksdb/pull/3838

Differential Revision: D8229794

Pulled By: miasantreble

fbshipit-source-id: 719b622ab7bf4109819bc44f45ec66f0dd3ee80d
2018-06-04 12:12:48 -07:00
Andrew Kryczka
fea2b1dfb2 Copy Get() result when file reads use mmap
Summary:
For iterator reads, a `SuperVersion` is pinned to preserve a snapshot of SST files, and `Block`s are pinned to allow `key()` and `value()` to return pointers directly into a RocksDB memory region. This works for both non-mmap reads, where the block owns the memory region, and mmap reads, where the file owns the memory region.

For point reads with `PinnableSlice`, only the `Block` object is pinned. This works for non-mmap reads because the block owns the memory region, so even if the file is deleted after compaction, the memory region survives. However, for mmap reads, file deletion causes the memory region to which the `PinnableSlice` refers to be unmapped.   The result is usually a segfault upon accessing the `PinnableSlice`, although sometimes it returned wrong results (I repro'd this a bunch of times with `db_stress`).

This PR copies the value into the `PinnableSlice` when it comes from mmap'd memory. We can tell whether the `Block` owns its memory using `Block::cachable()`, which is unset when reads do not use the provided buffer as is the case with mmap file reads. When that is false we ensure the result of `Get()` is copied.

This feels like a short-term solution as ideally we'd have the `PinnableSlice` pin the mmap'd memory so we can do zero-copy reads. It seemed hard so I chose this approach to fix correctness in the meantime.
Closes https://github.com/facebook/rocksdb/pull/3881

Differential Revision: D8076288

Pulled By: ajkr

fbshipit-source-id: 31d78ec010198723522323dbc6ea325122a46b08
2018-06-01 16:57:58 -07:00
Zhongyi Xie
2a0dfaa044 fix PrefixExtractorChanged: pass raw pointer instead shared_ptr
Summary:
This should resolve the performance regression caused by the unnecessary copying of the shared_ptr.
Closes https://github.com/facebook/rocksdb/pull/3937

Differential Revision: D8232330

Pulled By: miasantreble

fbshipit-source-id: 7885bf7cd190b6f87164c52d6edd328298c13f97
2018-05-31 21:42:50 -07:00
Maysam Yabandeh
44cf84932f Fix the bug of some test scenarios being put after kEnd
Summary:
DBTestBase::OptionConfig includes the scenarios that unit tests could iterate over them by calling ChangeOptions(). Some of the options have  been mistakenly put after kEnd which makes them essentially invisible to ChangeOptions() caller. This patch fixes it except for kUniversalSubcompactions which is left as TODO since it would break some unit tests.
Closes https://github.com/facebook/rocksdb/pull/3935

Differential Revision: D8230748

Pulled By: maysamyabandeh

fbshipit-source-id: edddb8fffcd161af1809fef24798ce118f8593db
2018-05-31 19:28:00 -07:00
Maysam Yabandeh
03cda531e4 Check for rep_->table_properties being nullptr
Summary:
The very old sst formats do not have table_properties and rep_->table_properties is thus nullptr. The recent patch in https://github.com/facebook/rocksdb/pull/3894 does not check for nullptr and hence makes it backward incompatible. This patch adds the check.
Closes https://github.com/facebook/rocksdb/pull/3918

Differential Revision: D8188638

Pulled By: maysamyabandeh

fbshipit-source-id: b1d986665ecf0b4d1c442adfa8a193b97707d47b
2018-05-29 12:13:55 -07:00
Maysam Yabandeh
402b7aa07f Exclude seq from index keys
Summary:
Index blocks have the same format as data blocks. The keys therefore similarly to the keys in the data blocks are internal keys, which means that in addition to the user key it also has 8 bytes that encodes sequence number and value type. This extra 8 bytes however is not necessary in index blocks since the index keys act as an separator between two data blocks. The only exception is when the last key of a block and the first key of the next block share the same user key, in which the sequence number is required to act as a separator.
The patch excludes the sequence from index keys only if the above special case does not happen for any of the index keys. It then records that in the property block. The reader looks at the property block to see if it should expect sequence numbers in the keys of the index block.s
Closes https://github.com/facebook/rocksdb/pull/3894

Differential Revision: D8118775

Pulled By: maysamyabandeh

fbshipit-source-id: 915479f028b5799ca91671d67455ecdefbd873bd
2018-05-25 18:42:43 -07:00
Nathan VanBenschoten
8c3bf0801b Check status when reading HashIndexPrefixesMetadataBlock
Summary:
This was missed in a refactor of `ReadBlockContents` (2f1a3a4).
Closes https://github.com/facebook/rocksdb/pull/3906

Differential Revision: D8172648

Pulled By: ajkr

fbshipit-source-id: 27e453b19795fea974bfed4721105be6f3a12090
2018-05-25 17:42:51 -07:00
Yanqin Jin
aa53579d6c Fix segfault caused by object premature destruction
Summary:
Please refer to earlier discussion in [issue 3609](https://github.com/facebook/rocksdb/issues/3609).
There was also an alternative fix in [PR 3888](https://github.com/facebook/rocksdb/pull/3888), but the proposed solution requires complex change.

To summarize the cause of the problem. Upon creation of a column family, a `BlockBasedTableFactory` object is `new`ed and encapsulated by a `std::shared_ptr`. Since there is no other `std::shared_ptr` pointing to this `BlockBasedTableFactory`, when the column family is dropped, the `ColumnFamilyData` is `delete`d, causing the destructor of `std::shared_ptr`. Since there is no other `std::shared_ptr`, the underlying memory is also freed.
Later when the db exits, it releases all the table readers, including the table readers that have been operating on the dropped column family. This needs to access the `table_options` owned by `BlockBasedTableFactory` that has already been deleted. Therefore, a segfault is raised.
Previous workaround is to purge all obsolete files upon `ColumnFamilyData` destruction, which leads to a force release of table readers of the dropped column family. However this does not work when the user disables file deletion.

Our solution in this PR is making a copy of `table_options` in `BlockBasedTable::Rep`. This solution increases memory copy and usage, but is much simpler.

Test plan
```
$ make -j16
$ ./column_family_test --gtest_filter=ColumnFamilyTest.CreateDropAndDestroy:ColumnFamilyTest.CreateDropAndDestroyWithoutFileDeletion
```

Expected behavior:
All tests should pass.
Closes https://github.com/facebook/rocksdb/pull/3898

Differential Revision: D8149421

Pulled By: riversand963

fbshipit-source-id: eaecc2e064057ef607fbdd4cc275874f866c3438
2018-05-25 11:57:51 -07:00
Zhongyi Xie
6c73a46693 Fix a backward compatibility problem with table_properties being nullptr
Summary:
Currently when ldb built from master tries to open a DB from version 2.2, there will be a segfault because table_properties didn't exist back then.
Closes https://github.com/facebook/rocksdb/pull/3890

Differential Revision: D8100914

Pulled By: miasantreble

fbshipit-source-id: b255e8aedc54695432be2e704839c857dabdd65a
2018-05-22 13:57:17 -07:00
Zhongyi Xie
c3ebc75843 Move prefix_extractor to MutableCFOptions
Summary:
Currently it is not possible to change bloom filter config without restart the db, which is causing a lot of operational complexity for users.
This PR aims to make it possible to dynamically change bloom filter config.
Closes https://github.com/facebook/rocksdb/pull/3601

Differential Revision: D7253114

Pulled By: miasantreble

fbshipit-source-id: f22595437d3e0b86c95918c484502de2ceca120c
2018-05-21 14:43:11 -07:00
Andrew Kryczka
7b655214d2 Assert keys/values pinned by range deletion meta-block iterators
Summary:
`RangeDelAggregator` holds the pointers returned by `BlockIter::key()` and `BlockIter::value()` so requires the data to which they point is pinned. `BlockIter::key()` points into block memory and is guaranteed to be pinned if and only if prefix encoding is disabled (or, equivalently, restart interval is set to one). I think `BlockIter::value()` is always pinned. Added an assert for these and removed the wrong TODO about increasing restart interval, which would enable key prefix encoding and break the assertion.
Closes https://github.com/facebook/rocksdb/pull/3875

Differential Revision: D8063667

Pulled By: ajkr

fbshipit-source-id: 60b5ebcc0cdd610dd6aad9e74a23378793672c41
2018-05-21 09:57:00 -07:00
Siying Dong
26da3676d9 class Block to store num_restarts_
Summary:
Right now, every Block::NewIterator() reads num_restarts_ from the block, which is already read in Block::Block(). This sometimes cause a CPU cache miss. Although fetching this cacheline can usually benefit follow-up block restart offset reading, as they are close to each other, it's almost free to get ride of this read by storing it in the Block class.
Closes https://github.com/facebook/rocksdb/pull/3869

Differential Revision: D8052493

Pulled By: siying

fbshipit-source-id: 9c72360f0c2d7329f3c198ce4eaedd2bc14b87c1
2018-05-18 12:56:55 -07:00
Mike Kolupaev
8bf555f487 Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
Summary:
Before this PR, Iterator/InternalIterator may simultaneously have non-ok status() and Valid() = true. That state means that the last operation failed, but the iterator is nevertheless positioned on some unspecified record. Likely intended uses of that are:
 * If some sst files are corrupted, a normal iterator can be used to read the data from files that are not corrupted.
 * When using read_tier = kBlockCacheTier, read the data that's in block cache, skipping over the data that is not.

However, this behavior wasn't documented well (and until recently the wiki on github had misleading incorrect information). In the code there's a lot of confusion about the relationship between status() and Valid(), and about whether Seek()/SeekToLast()/etc reset the status or not. There were a number of bugs caused by this confusion, both inside rocksdb and in the code that uses rocksdb (including ours).

This PR changes the convention to:
 * If status() is not ok, Valid() always returns false.
 * Any seek operation resets status. (Before the PR, it depended on iterator type and on particular error.)

This does sacrifice the two use cases listed above, but siying said it's ok.

Overview of the changes:
 * A commit that adds missing status checks in MergingIterator. This fixes a bug that actually affects us, and we need it fixed. `DBIteratorTest.NonBlockingIterationBugRepro` explains the scenario.
 * Changes to lots of iterator types to make all of them conform to the new convention. Some bug fixes along the way. By far the biggest changes are in DBIter, which is a big messy piece of code; I tried to make it less big and messy but mostly failed.
 * A stress-test for DBIter, to gain some confidence that I didn't break it. It does a few million random operations on the iterator, while occasionally modifying the underlying data (like ForwardIterator does) and occasionally returning non-ok status from internal iterator.

To find the iterator types that needed changes I searched for "public .*Iterator" in the code. Here's an overview of all 27 iterator types:

Iterators that didn't need changes:
 * status() is always ok(), or Valid() is always false: MemTableIterator, ModelIter, TestIterator, KVIter (2 classes with this name anonymous namespaces), LoggingForwardVectorIterator, VectorIterator, MockTableIterator, EmptyIterator, EmptyInternalIterator.
 * Thin wrappers that always pass through Valid() and status(): ArenaWrappedDBIter, TtlIterator, InternalIteratorFromIterator.

Iterators with changes (see inline comments for details):
 * DBIter - an overhaul:
    - It used to silently skip corrupted keys (`FindParseableKey()`), which seems dangerous. This PR makes it just stop immediately after encountering a corrupted key, just like it would for other kinds of corruption. Let me know if there was actually some deeper meaning in this behavior and I should put it back.
    - It had a few code paths silently discarding subiterator's status. The stress test caught a few.
    - The backwards iteration code path was expecting the internal iterator's set of keys to be immutable. It's probably always true in practice at the moment, since ForwardIterator doesn't support backwards iteration, but this PR fixes it anyway. See added DBIteratorTest.ReverseToForwardBug for an example.
    - Some parts of backwards iteration code path even did things like `assert(iter_->Valid())` after a seek, which is never a safe assumption.
    - It used to not reset status on seek for some types of errors.
    - Some simplifications and better comments.
    - Some things got more complicated from the added error handling. I'm open to ideas for how to make it nicer.
 * MergingIterator - check status after every operation on every subiterator, and in some places assert that valid subiterators have ok status.
 * ForwardIterator - changed to the new convention, also slightly simplified.
 * ForwardLevelIterator - fixed some bugs and simplified.
 * LevelIterator - simplified.
 * TwoLevelIterator - changed to the new convention. Also fixed a bug that would make SeekForPrev() sometimes silently ignore errors from first_level_iter_.
 * BlockBasedTableIterator - minor changes.
 * BlockIter - replaced `SetStatus()` with `Invalidate()` to make sure non-ok BlockIter is always invalid.
 * PlainTableIterator - some seeks used to not reset status.
 * CuckooTableIterator - tiny code cleanup.
 * ManagedIterator - fixed some bugs.
 * BaseDeltaIterator - changed to the new convention and fixed a bug.
 * BlobDBIterator - seeks used to not reset status.
 * KeyConvertingIterator - some small change.
Closes https://github.com/facebook/rocksdb/pull/3810

Differential Revision: D7888019

Pulled By: al13n321

fbshipit-source-id: 4aaf6d3421c545d16722a815b2fa2e7912bc851d
2018-05-17 02:56:56 -07:00
Siying Dong
ddfd2525d2 Make BlockIter final
Summary:
Now BlockBasedTableIterator directly uses BlockIter. By making BlockIter final, we can prevent unintended virtual function overriding.
Closes https://github.com/facebook/rocksdb/pull/3828

Differential Revision: D7933816

Pulled By: siying

fbshipit-source-id: 026a08cb5c5b6d3d6f44743152b4251da4756f2c
2018-05-09 10:27:26 -07:00
Maysam Yabandeh
fc522bdb3e Evenly split HarnessTest.Randomized
Summary:
Currently HarnessTest.Randomized is already split but some of the splits are faster than the others. The reason is that each split takes a continuous range of the generated args and the test with later args takes longer to finish. The patch evenly split the args among splits in a round robin fashion.
Before:
```
[       OK ] HarnessTest.Randomized1n2 (2278 ms)
[       OK ] HarnessTest.Randomized3n4 (1095 ms)
[       OK ] HarnessTest.Randomized5 (658 ms)
[       OK ] HarnessTest.Randomized6 (1258 ms)
[       OK ] HarnessTest.Randomized7 (6476 ms)
[       OK ] HarnessTest.Randomized8 (8182 ms)
```
After
```
[       OK ] HarnessTest.Randomized1 (2649 ms)
[       OK ] HarnessTest.Randomized2 (2645 ms)
[       OK ] HarnessTest.Randomized3 (2577 ms)
[       OK ] HarnessTest.Randomized4 (2490 ms)
[       OK ] HarnessTest.Randomized5 (2553 ms)
[       OK ] HarnessTest.Randomized6 (2560 ms)
[       OK ] HarnessTest.Randomized7 (2501 ms)
[       OK ] HarnessTest.Randomized8 (2574 ms)
```
Closes https://github.com/facebook/rocksdb/pull/3808

Differential Revision: D7882663

Pulled By: maysamyabandeh

fbshipit-source-id: 09b749a9684b6d7d65466aa4b00c5334a49e833e
2018-05-04 15:28:06 -07:00
Zhongyi Xie
6cab3184f5 avoid double delete on dummy record insertion failure
Summary:
When the dummy record insertion fails, there is no need to explicitly delete the block as it will be registered for cleanup regardless.
Closes https://github.com/facebook/rocksdb/pull/3688

Differential Revision: D7537741

Pulled By: miasantreble

fbshipit-source-id: fcd3a3d3d382ee8e2c7ced0a4980e683d93a16d6
2018-05-01 16:01:28 -07:00
Andrew Kryczka
7004e45489 Remove block-based table assertion for non-empty filter block
Summary:
7a6353bd1c prevents empty filter blocks from being written for SST files containing range deletions only. However the assertion this PR removes is still a problem as we could be reading from a DB generated by a RocksDB build without the 7a6353bd1c patch. So remove the assertion. We already don't do this check when `cache_index_and_filter_blocks=false`, so it should be safe.
Closes https://github.com/facebook/rocksdb/pull/3773

Differential Revision: D7769964

Pulled By: ajkr

fbshipit-source-id: 7285762446f2cd2ccf16efd7a988a106fbb0d8d3
2018-04-26 14:43:11 -07:00
Maysam Yabandeh
7e4e381495 Fix the bloom filter skipping empty prefixes
Summary:
bc0da4b512 optimized bloom filters by skipping duplicate entires when the whole key and prefixes are both added to the bloom. It however used empty string as the initial value of the last entry added to the bloom. This is incorrect since empty key/prefix are valid entires by themselves. This patch fixes that.
Closes https://github.com/facebook/rocksdb/pull/3776

Differential Revision: D7778803

Pulled By: maysamyabandeh

fbshipit-source-id: d5a065daebee17f9403cac51e9d5626aac87bfbc
2018-04-26 13:28:31 -07:00
Maysam Yabandeh
bc0da4b512 Skip duplicate bloom keys when whole_key and prefix are mixed
Summary:
Currently we rely on FilterBitsBuilder to skip the duplicate keys. It does that by comparing that hash of the key to the hash of the last added entry. This logic breaks however when we have whole_key_filtering mixed with prefix blooms as their addition to FilterBitsBuilder will be interleaved. The patch fixes that by comparing the last whole key and last prefix with the whole key and prefix of the new key respectively and skip the call to FilterBitsBuilder if it is a duplicate.
Closes https://github.com/facebook/rocksdb/pull/3764

Differential Revision: D7744413

Pulled By: maysamyabandeh

fbshipit-source-id: 15df73bbbafdfd754d4e1f42ea07f47b03bc5eb8
2018-04-24 10:58:16 -07:00
Maysam Yabandeh
17e04039dd Propagate fill_cache config to partitioned index iterator
Summary:
Currently the partitioned index iterator creates a new ReadOptions which ignores the fill_cache config set to ReadOptions passed by the user. The patch propagates fill_cache from the user's ReadOptions to that of partition index iterator.
Also it clarifies the contract of fill_cache that i) it does not apply to filters, ii) it still charges block cache for the size of the data block, it still pin the block if it is already in the block cache.
Closes https://github.com/facebook/rocksdb/pull/3739

Differential Revision: D7678308

Pulled By: maysamyabandeh

fbshipit-source-id: 53ed96424ae922e499e2d4e3580ddc3f0db893da
2018-04-20 15:13:05 -07:00
Zhongyi Xie
954b496b3f fix memory leak in two_level_iterator
Summary:
this PR fixes a few failed contbuild:
1. ASAN memory leak in Block::NewIterator (table/block.cc:429). the proper destruction of first_level_iter_ and second_level_iter_ of two_level_iterator.cc is missing from the code after the refactoring in https://github.com/facebook/rocksdb/pull/3406
2. various unused param errors introduced by https://github.com/facebook/rocksdb/pull/3662
3. updated comment for `ForceReleaseCachedEntry` to emphasize the use of `force_erase` flag.
Closes https://github.com/facebook/rocksdb/pull/3718

Reviewed By: maysamyabandeh

Differential Revision: D7621192

Pulled By: miasantreble

fbshipit-source-id: 476c94264083a0730ded957c29de7807e4f5b146
2018-04-15 17:26:26 -07:00
David Lai
3be9b36453 comment unused parameters to turn on -Wunused-parameter flag
Summary:
This PR comments out the rest of the unused arguments which allow us to turn on the -Wunused-parameter flag. This is the second part of a codemod relating to https://github.com/facebook/rocksdb/pull/3557.
Closes https://github.com/facebook/rocksdb/pull/3662

Differential Revision: D7426121

Pulled By: Dayvedde

fbshipit-source-id: 223994923b42bd4953eb016a0129e47560f7e352
2018-04-12 17:59:16 -07:00
Maysam Yabandeh
d2bcd7611f Fix the memory leak with pinned partitioned filters
Summary:
The existing unit test did not set the level so the check for pinned partitioned filter/index being properly released from the block cache was not properly exercised as they only take effect in level 0. As a result a memory leak in pinned partitioned filters was hidden. The patch fix the test as well as the bug.
Closes https://github.com/facebook/rocksdb/pull/3692

Differential Revision: D7559763

Pulled By: maysamyabandeh

fbshipit-source-id: 55eff274945838af983c764a7d71e8daff092e4a
2018-04-09 16:28:19 -07:00
Maysam Yabandeh
67182678a5 Stats for false positive rate of full filtesr
Summary:
Adds two stats to allow us measuring the false positive rate of full filters:
- The total count of positives: rocksdb.bloom.filter.full.positive
- The total count of true positives: rocksdb.bloom.filter.full.true.positive
Not the term "full" in the stat name to indicate that they are meaningful in full filters. block-based filters are to be deprecated soon and supporting it is not worth the the additional cost of if-then-else branches.

Closes #3680

Tested by:
$ ./db_bench -benchmarks=fillrandom  -db /dev/shm/rocksdb-tmpdb --num=1000000 -bloom_bits=10
$ ./db_bench -benchmarks="readwhilewriting"  -db /dev/shm/rocksdb-tmpdb --statistics -bloom_bits=10 --duration=60 --num=2000000 --use_existing_db 2>&1 > /tmp/full.log
$ grep filter.full /tmp/full.log
rocksdb.bloom.filter.full.positive COUNT : 3628593
rocksdb.bloom.filter.full.true.positive COUNT : 3536026
which gives the false positive rate of 2.5%
Closes https://github.com/facebook/rocksdb/pull/3681

Differential Revision: D7517570

Pulled By: maysamyabandeh

fbshipit-source-id: 630ab1a473afdce404916d297035b6318de4c052
2018-04-05 15:58:48 -07:00
Sagar Vemuri
d687670256 Fix a leak in FilterBlockBuilder when adding prefix
Summary:
Our valgrind continuous test found an interesting leak which got introduced in #3614. We were adding the prefix key before saving the previous prefix start offset, due to which previous prefix offset is always incorrect. Fixed it by saving the the previous sate before adding the key.
Closes https://github.com/facebook/rocksdb/pull/3660

Differential Revision: D7418698

Pulled By: sagar0

fbshipit-source-id: 9933685f943cf2547ed5c553f490035a2fa785cf
2018-03-27 15:13:56 -07:00
Anand Ananthabhotla
f9f4d40f93 Align SST file data blocks to avoid spanning multiple pages
Summary:
Provide a block_align option in BlockBasedTableOptions to allow
alignment of SST file data blocks. This will avoid higher
IOPS/throughput load due to < 4KB data blocks spanning 2 4KB pages.
When this option is set to true, the block alignment is set to lower of
block size and 4KB.
Closes https://github.com/facebook/rocksdb/pull/3502

Differential Revision: D7400897

Pulled By: anand1976

fbshipit-source-id: 04cc3bd144e88e3431a4f97604e63ad7a0f06d44
2018-03-26 20:26:10 -07:00
Dmitri Smirnov
d382ae7de6 Imporve perf of random read and insert compare by suggesting inlining to the compiler
Summary:
Results from 2015 compiler. This improve sequential insert. Random Read results are inconclusive but I hope 2017 will do a better job at inlining.

Before:
fillseq      :       **3.638 micros/op 274866 ops/sec;  213.9 MB/s**

After:
fillseq      :       **3.379 micros/op 295979 ops/sec;  230.3 MB/s**
Closes https://github.com/facebook/rocksdb/pull/3645

Differential Revision: D7382711

Pulled By: siying

fbshipit-source-id: 092a07ffe8a6e598d1226ceff0f11b35e6c5c8e4
2018-03-23 13:26:55 -07:00
Huachao Huang
7a6353bd1c Ignore empty filter block when data block is empty
Summary:
Close https://github.com/facebook/rocksdb/issues/3592
Closes https://github.com/facebook/rocksdb/pull/3614

Differential Revision: D7291706

Pulled By: ajkr

fbshipit-source-id: 9dd8f40bd7716588e1e3fd6be0c2bc2766861f8c
2018-03-21 23:13:05 -07:00
Bruce Mitchener
a3a3f5497c Fix some typos in comments and docs.
Summary: Closes https://github.com/facebook/rocksdb/pull/3568

Differential Revision: D7170953

Pulled By: siying

fbshipit-source-id: 9cfb8dd88b7266da920c0e0c1e10fb2c5af0641c
2018-03-08 10:27:25 -08:00
Siying Dong
b560fc9f62 Fix a block pinning regression introduced in b555ed30a4
Summary:
b555ed30a4 introduces a regression, which causes blocks always to be pinned in block based iterators. Fix it.
Closes https://github.com/facebook/rocksdb/pull/3582

Differential Revision: D7189534

Pulled By: siying

fbshipit-source-id: 117dc7a03d0a0e360424db02efb366e12da2be03
2018-03-08 10:12:23 -08:00
Fosco Marotto
d518fe1da6 uint64_t and size_t changes to compile for iOS
Summary:
In attempting to build a static lib for use in iOS, I ran in to lots of type errors between uint64_t and size_t.  This PR contains the changes I made to get `TARGET_OS=IOS make static_lib` to succeed while also getting Xcode to build successfully with the resulting `librocksdb.a` library imported.

This also compiles for me on macOS and tests fine, but I'm really not sure if I made the correct decisions about where to `static_cast` and where to change types.

Also up for discussion: is iOS worth supporting?  Getting the static lib is just part one, we aren't providing any bridging headers or wrappers like the ObjectiveRocks project, it won't be a great experience.
Closes https://github.com/facebook/rocksdb/pull/3503

Differential Revision: D7106457

Pulled By: gfosco

fbshipit-source-id: 82ac2073de7e1f09b91f6b4faea91d18bd311f8e
2018-03-06 12:43:51 -08:00
Andrew Kryczka
5d68243e61 Comment out unused variables
Summary:
Submitting on behalf of another employee.
Closes https://github.com/facebook/rocksdb/pull/3557

Differential Revision: D7146025

Pulled By: ajkr

fbshipit-source-id: 495ca5db5beec3789e671e26f78170957704e77e
2018-03-05 13:13:41 -08:00
Igor Sugak
aba3409740 Back out "[codemod] - comment out unused parameters"
Reviewed By: igorsugak

fbshipit-source-id: 4a93675cc1931089ddd574cacdb15d228b1e5f37
2018-02-22 12:43:17 -08:00
David Lai
f4a030ce81 - comment out unused parameters
Reviewed By: everiq, igorsugak

Differential Revision: D7046710

fbshipit-source-id: 8e10b1f1e2aecebbfb229c742e214db887e5a461
2018-02-22 09:44:23 -08:00
jsteemann
4e7a182d09 Several small "fixes"
Summary:
- removed a few unneeded variables
- fused some variable declarations and their assignments
- fixed right-trimming code in string_util.cc to not underflow
- simplifed an assertion
- move non-nullptr check assertion before dereferencing of that pointer
- pass an std::string function parameter by const reference instead of by value (avoiding potential copy)
Closes https://github.com/facebook/rocksdb/pull/3507

Differential Revision: D7004679

Pulled By: sagar0

fbshipit-source-id: 52944952d9b56dfcac3bea3cd7878e315bb563c4
2018-02-15 16:57:37 -08:00
Siying Dong
b555ed30a4 Customized BlockBasedTableIterator and LevelIterator
Summary:
Use a customzied BlockBasedTableIterator and LevelIterator to replace current implementations leveraging two-level-iterator. Hope the customized logic will make code easier to understand. As a side effect, BlockBasedTableIterator reduces the allocation for the data block iterator object, and avoid the virtual function call to it, because we can directly reference BlockIter, a final class. Similarly, LevelIterator reduces virtual function call to the dummy iterator iterating the file metadata. It also enabled further optimization.

The upper bound check is also moved from index block to data block. This implementation fits this iterator better. After the change, forwared iterator is slightly optimized to ensure we trim those iterators.

The two-level-iterator now is only used by partitioned index, so it is simplified.
Closes https://github.com/facebook/rocksdb/pull/3406

Differential Revision: D6809041

Pulled By: siying

fbshipit-source-id: 7da3b9b1d3c8e9d9405302c15920af1fcaf50ffa
2018-02-12 17:12:25 -08:00
Andrew Kryczka
e78715c29a Eliminate a memcpy for uncompressed blocks
Summary:
`ReadBlockFromFile` uses a stack buffer to hold small data blocks before passing them to the compression library, which outputs uncompressed data in a heap buffer. In the case of `kNoCompression` there is a `memcpy` to copy from stack buffer to heap buffer.

This PR optimizes `ReadBlockFromFile` to skip the stack buffer for files whose blocks are known to be uncompressed. We determine this using the SST file property, "compression_name", if it's available.
Closes https://github.com/facebook/rocksdb/pull/3472

Differential Revision: D6920848

Pulled By: ajkr

fbshipit-source-id: 5c753e804efc178b9229ae5dbe6a4adc32031f07
2018-02-07 15:57:37 -08:00
Zhongyi Xie
2f29991701 split RandomizedHarnessTest more ways
Summary:
RandomizedHarnessTest enumerates different combinations of test type, compression type, restart interval, etc. For some combinations it takes very long to finish, causing the test to time out in test infrastructure.
This PR split the test input into smaller trunks in the hope that they will fit in the timeout window. Another possibility is to reduce `num_entries` of course
Closes https://github.com/facebook/rocksdb/pull/3467

Differential Revision: D6910235

Pulled By: miasantreble

fbshipit-source-id: 717246ee5d21a8a48ad82d4d9c04f9051a66f07f
2018-02-06 13:58:18 -08:00
Andrew Kryczka
1edac32b77 Update rocksdb.read.block.get.micros when block cache disabled
Summary:
Previously `ReadBlockFromFile` for data blocks was only measured when reading a block to populate block cache. This PR adds the corresponding measurements for users who disabled block cache.
Closes https://github.com/facebook/rocksdb/pull/3442

Differential Revision: D6848671

Pulled By: ajkr

fbshipit-source-id: bb4bbe1797fa2cc1d9a5bad44891af2b55384b41
2018-01-31 14:26:52 -08:00
Fosco Marotto
77dc069eb9 Change size_t cast in table_test
Summary:
Fixes this build error on master (macOS):

```
table/table_test.cc:972:27: error: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to
      'unsigned int' [-Werror,-Wshorten-64-to-32]
```
Closes https://github.com/facebook/rocksdb/pull/3434

Reviewed By: maysamyabandeh

Differential Revision: D6840354

Pulled By: gfosco

fbshipit-source-id: fffac6aefbbdd134ce1299453c5590aa855a5fc8
2018-01-30 11:12:51 -08:00
Zhongyi Xie
3fe0937180 Use block cache to track memory usage when ReadOptions.fill_cache=false
Summary:
ReadOptions.fill_cache is set in compaction inputs and can be set by users in their queries too. It tells RocksDB not to put a data block used to block cache.

The memory used by the data block is, however, not trackable by users.

To make the system more manageable, we can cost the block to block cache while using it, and then release it after using.
Closes https://github.com/facebook/rocksdb/pull/3333

Differential Revision: D6670230

Pulled By: miasantreble

fbshipit-source-id: ab848d3ed286bd081a13ee1903de357b56cbc308
2018-01-29 14:43:10 -08:00
Mark Isaacson
b8eb32f8cf Suppress lint in old files
Summary: Grandfather in super old lint issues to make a clean slate for moving forward that allows us to have stronger enforcement on new issues.

Reviewed By: yiwu-arbug

Differential Revision: D6821806

fbshipit-source-id: 22797d31ec58e9eb0255d3b66fedfcfcb0dc127c
2018-01-29 12:56:42 -08:00
Maysam Yabandeh
46acdc9883 Split HarnessTest_Randomized to avoid timeout
Summary:
Split HarnessTest_Randomized to two tests
Closes https://github.com/facebook/rocksdb/pull/3424

Differential Revision: D6826006

Pulled By: maysamyabandeh

fbshipit-source-id: 59c9a11c7da092206effce6e4fa3792f9c66bef2
2018-01-29 07:41:44 -08:00
Sagar Vemuri
d938226af4 Improve performance of long range scans with readahead
Summary:
This change improves the performance of iterators doing long range scans (e.g. big/full table scans in MyRocks) by using readahead and prefetching additional data on each disk IO. This prefetching is automatically enabled on noticing more than 2 IOs for the same table file during iteration. The readahead size starts with 8KB and is exponentially increased on each additional sequential IO, up to a max of 256 KB. This helps in cutting down the number of IOs needed to complete the range scan.

Constraints:
- The prefetched data is stored by the OS in page cache. So this currently works only for non direct-reads use-cases i.e applications which use page cache. (Direct-I/O support will be enabled in a later PR).
- This gets currently enabled only when ReadOptions.readahead_size = 0 (which is the default value).

Thanks to siying for the original idea and implementation.

**Benchmarks:**
Data fill:
```
TEST_TMPDIR=/data/users/$USER/benchmarks/iter ./db_bench -benchmarks=fillrandom -num=1000000000 -compression_type="none" -level_compaction_dynamic_level_bytes
```
Do a long range scan: Seekrandom with large number of nexts
```
TEST_TMPDIR=/data/users/$USER/benchmarks/iter ./db_bench -benchmarks=seekrandom -duration=60 -num=1000000000 -use_existing_db -seek_nexts=10000 -statistics -histogram
```

Page cache was cleared before each experiment with the command:
```
sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"
```
```
Before:
seekrandom   :   34020.945 micros/op 29 ops/sec;   32.5 MB/s (1636 of 1999 found)
With this change:
seekrandom   :    8726.912 micros/op 114 ops/sec;  126.8 MB/s (5702 of 6999 found)
```
~3.9X performance improvement.

Also verified with strace and gdb that the readahead size is increasing as expected.
```
strace -e readahead -f -T -t -p <db_bench process pid>
```
Closes https://github.com/facebook/rocksdb/pull/3282

Differential Revision: D6586477

Pulled By: sagar0

fbshipit-source-id: 8a118a0ed4594fbb7f5b1cafb242d7a4033cb58c
2018-01-25 21:41:53 -08:00
Siying Dong
1039133f2d BlockBasedTable::NewDataBlockIterator to always return BlockIter
Summary:
This is a pre-cleaning up before a major block based table iterator refactoring. BlockBasedTable::NewDataBlockIterator() will always return BlockIter. This simplifies the logic and code and enable further refactoring and optimization.
Closes https://github.com/facebook/rocksdb/pull/3398

Differential Revision: D6780165

Pulled By: siying

fbshipit-source-id: 273f7dc896724f682c0118fb69a359d9cc4418b4
2018-01-25 14:57:18 -08:00
Islam AbdelRahman
c615689bb5 Support skipping bloom filters for SstFileWriter
Summary:
Add an option for SstFileWriter to skip building bloom filters
Closes https://github.com/facebook/rocksdb/pull/3360

Differential Revision: D6709120

Pulled By: IslamAbdelRahman

fbshipit-source-id: 964d4bce38822a048691792f447bcfbb4b6bd809
2018-01-22 14:42:18 -08:00
Yi Wu
dc360df81e Fix multiple build failures
Summary:
* Fix DBTest.CompactRangeWithEmptyBottomLevel lite build failure
* Fix DBTest.AutomaticConflictsWithManualCompaction failure introduce by #3366
* Fix BlockBasedTableTest::IndexUncompressed should be disabled if snappy is disabled
* Fix ASAN failure with DBBasicTest::DBClose test
Closes https://github.com/facebook/rocksdb/pull/3373

Differential Revision: D6732313

Pulled By: yiwu-arbug

fbshipit-source-id: 1eb9b9d9a8d795f56188fa9770db9353f6fdedc5
2018-01-16 17:30:39 -08:00
Dmitri Smirnov
b010116d82 Eliminate some redundant block reads.
Summary:
Re-use metadata for reading Compression Dictionary on BlockBased
  table open, this saves two reads from disk.
  This helps to our 999 percentile in 5.6.1 where prefetch buffer is  not present.
Closes https://github.com/facebook/rocksdb/pull/3354

Differential Revision: D6695753

Pulled By: ajkr

fbshipit-source-id: bb8acd9e9e66e65b89c548ab8940570ae360333c
2018-01-10 17:11:58 -08:00
Anand Ananthabhotla
199405192d Add a BlockBasedTableOption to turn off index block compression.
Summary:
Add a new bool option index_uncompressed in BlockBasedTableOptions.
Closes https://github.com/facebook/rocksdb/pull/3303

Differential Revision: D6686161

Pulled By: anand1976

fbshipit-source-id: 748b46993d48a01e5f89b6bd3e41f06a59ec6054
2018-01-10 15:11:59 -08:00
Siying Dong
ccc095a016 Speed up BlockTest.BlockReadAmpBitmap
Summary:
BlockTest.BlockReadAmpBitmap is too slow and times out in some environments. Speed it up by:
(1) improve the way the verification is done. With this it is 5 times faster
(2) run fewer tests for large blocks. This cut it down by another 10 times.
Now it can finish in similar time as other tests.
Closes https://github.com/facebook/rocksdb/pull/3313

Differential Revision: D6643711

Pulled By: siying

fbshipit-source-id: c2397d666eab5421a78ca87e1e45491e0f832a6d
2018-01-02 10:41:28 -08:00
Siying Dong
6b77c07379 NUMBER_BLOCK_COMPRESSED, etc, shouldn't be treated as timer counter
Summary:
NUMBER_BLOCK_DECOMPRESSED and NUMBER_BLOCK_COMPRESSED are not reported unless the stats level contain detailed timers, which is wrong. They are normal counters. Fix it.
Closes https://github.com/facebook/rocksdb/pull/3263

Differential Revision: D6552519

Pulled By: siying

fbshipit-source-id: 40899ccea7b2856bb39752616657c0bfd432f6f9
2017-12-14 10:27:43 -08:00
Zhongyi Xie
51c2ea0feb Reduce heavy hitter for Get operation
Summary:
This PR addresses the following heavy hitters in `Get` operation by moving calls to `StatisticsImpl::recordTick` from `BlockBasedTable` to `Version::Get`

- rocksdb.block.cache.bytes.write
- rocksdb.block.cache.add
- rocksdb.block.cache.data.miss
- rocksdb.block.cache.data.bytes.insert
- rocksdb.block.cache.data.add
- rocksdb.block.cache.hit
- rocksdb.block.cache.data.hit
- rocksdb.block.cache.bytes.read

The db_bench statistics before and after the change are:

|1GB block read|Children      |Self  |Command          |Shared Object        |Symbol|
|---|---|---|---|---|---|
|master:     |4.22%     |1.31%  |db_bench  |db_bench  |[.] rocksdb::StatisticsImpl::recordTick|
|updated:    |0.51%     |0.21%  |db_bench  |db_bench  |[.] rocksdb::StatisticsImpl::recordTick|
|     	     |0.14%     |0.14%  |db_bench  |db_bench  |[.] rocksdb::GetContext::record_counters|

|1MB block read|Children      |Self  |Command          |Shared Object        |Symbol|
|---|---|---|---|---|---|
|master:    |3.48%     |1.08%  |db_bench  |db_bench  |[.] rocksdb::StatisticsImpl::recordTick|
|updated:    |0.80%     |0.31%  |db_bench  |db_bench  |[.] rocksdb::StatisticsImpl::recordTick|
|    	     |0.35%     |0.35%  |db_bench  |db_bench  |[.] rocksdb::GetContext::record_counters|
Closes https://github.com/facebook/rocksdb/pull/3172

Differential Revision: D6330532

Pulled By: miasantreble

fbshipit-source-id: 2b492959e00a3db29e9437ecdcc5e48ca4ec5741
2017-12-12 21:11:33 -08:00
Yi Wu
7393ef779c Fix BlockFetcher ASAN error
Summary:
Some call sites of BlockFetcher create temporary ReadOptions and pass to BlockFetcher. The temporary object will be gone after BlockFetcher construction but BlockFetcher keep its reference, causing stack-use-after-scope. Fixing it.
Closes https://github.com/facebook/rocksdb/pull/3258

Differential Revision: D6547152

Pulled By: yiwu-arbug

fbshipit-source-id: 6b49e9dd46bb72307f5d8f88ea15faacff35b9bc
2017-12-12 12:12:38 -08:00
Siying Dong
a9c8d4ef15 Fix memory issue introduced by 2f1a3a4d74
Summary: Closes https://github.com/facebook/rocksdb/pull/3256

Differential Revision: D6541714

Pulled By: siying

fbshipit-source-id: 40efd89b68587a9d58cfe6f4eebd771c2d9f1542
2017-12-11 18:27:28 -08:00
Siying Dong
2f1a3a4d74 Refactor ReadBlockContents()
Summary:
Divide ReadBlockContents() to multiple sub-functions. Maintaining the input and intermediate data in a new class BlockFetcher.
I hope in general it makes the code easier to maintain.
Another motivation to do it is to clearly divide the logic before file reading and after file reading. The refactor will help us evaluate how can we make I/O async in the future.
Closes https://github.com/facebook/rocksdb/pull/3244

Differential Revision: D6520983

Pulled By: siying

fbshipit-source-id: 338d90bc0338472d46be7a7682028dc9114b12e9
2017-12-11 15:27:32 -08:00
Prashant D
baff91c1ad table: Fix coverity issues
Summary:
table/block.cc:
420  }

CID 1396127 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
7. uninit_member: Non-static class member restart_offset_ is not initialized in this constructor nor in any functions that it calls.
421}

table/block_based_table_builder.cc:

CID 1418259 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
7. uninit_member: Non-static class member compressed_cache_key_prefix_size is not initialized in this constructor nor in any functions that it calls.

table/block_based_table_reader.h:
   	3. uninit_member: Non-static class member index_type is not initialized in this constructor nor in any functions that it calls.

CID 1396147 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
5. uninit_member: Non-static class member hash_index_allow_collision is not initialized in this constructor nor in any functions that it calls.
413        global_seqno(kDisableGlobalSequenceNumber) {}
414

table/cuckoo_table_reader.cc:
 55  if (hash_funs == user_props.end()) {
 56    status_ = Status::Corruption("Number of hash functions not found");
   	5. uninit_member: Non-static class member is_last_level_ is not initialized in this constructor nor in any functions that it calls.
   	7. uninit_member: Non-static class member identity_as_first_hash_ is not initialized in this constructor nor in any functions that it calls.
   	9. uninit_member: Non-static class member use_module_hash_ is not initialized in this constructor nor in any functions that it calls.
   	11. uninit_member: Non-static class member num_hash_func_ is not initialized in this constructor nor in any functions that it calls.
   	13. uninit_member: Non-static class member key_length_ is not initialized in this constructor nor in any functions that it calls.
   	15. uninit_member: Non-static class member user_key_length_ is not initialized in this constructor nor in any functions that it calls.
   	17. uninit_member: Non-static class member value_length_ is not initialized in this constructor nor in any functions that it calls.
   	19. uninit_member: Non-static class member bucket_length_ is not initialized in this constructor nor in any functions that it calls.
   	21. uninit_member: Non-static class member cuckoo_block_size_ is not initialized in this constructor nor in any functions that it calls.
   	23. uninit_member: Non-static class member cuckoo_block_bytes_minus_one_ is not initialized in this constructor nor in any functions that it calls.

CID 1322785 (#2 of 2): Uninitialized scalar field (UNINIT_CTOR)
25. uninit_member: Non-static class member table_size_ is not initialized in this constructor nor in any functions that it calls.
 57    return;

table/plain_table_index.h:
   	2. uninit_member: Non-static class member index_size_ is not initialized in this constructor nor in any functions that it calls.

CID 1322801 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member sub_index_size_ is not initialized in this constructor nor in any functions that it calls.
128        huge_page_tlb_size_(huge_page_tlb_size) {}
129
Closes https://github.com/facebook/rocksdb/pull/3113

Differential Revision: D6505719

Pulled By: yiwu-arbug

fbshipit-source-id: 38f44d8f9dfefb4c2e25d83b8df25a5201c75618
2017-12-07 11:57:36 -08:00
Andrew Kryczka
63f1c0a57d fix gflags namespace
Summary:
I started adding gflags support for cmake on linux and got frustrated that I'd need to duplicate the build_detect_platform logic, which determines namespace based on attempting compilation. We can do it differently -- use the GFLAGS_NAMESPACE macro if available, and if not, that indicates it's an old gflags version without configurable namespace so we can simply hardcode "google".
Closes https://github.com/facebook/rocksdb/pull/3212

Differential Revision: D6456973

Pulled By: ajkr

fbshipit-source-id: 3e6d5bde3ca00d4496a120a7caf4687399f5d656
2017-12-01 10:42:05 -08:00
Andrew Kryczka
c85f8ccca3 convert null terminator in ascii dump
Summary:
The ASCII output is almost always useless to me as the first '\0' byte in the key or value causes it to stop printing. Since all characters are already surrounded by spaces, "\ 0" (how we display a backslash followed by a zero) and "\0" (how this PR displays a null terminator) are distinguishable. My assumption is the value of seeing all the bytes outweighs the value of the alignment we had before, where we always had one character followed by one space.
Closes https://github.com/facebook/rocksdb/pull/3203

Differential Revision: D6428651

Pulled By: ajkr

fbshipit-source-id: aafc978a51e9ea029cfe3e763e2bb0e1751b9ccf
2017-11-28 17:28:58 -08:00
Phani Shekhar Mantripragada
4b65cfc723 Support for block_cache num_shards and other config via option string.
Summary:
Problem: Option string accepts only cache_size as parameter for block_cache which is specified as "block_cache=1M".
It doesn't accept other parameters like num_shards etc.

Changes :
1) ParseBlockBasedTableOption in block_based_table_factory is edited to accept cache options in the format "block_cache=<cache_size>:<num_shard_bits>:<strict_capacity_limit>:<high_pri_pool_ratio>".
Options other than cache_size are optional to maintain backward compatibility. The changes are valid for block_cache_compressed as well.
For example, "block_cache=1M:6:true:0.5", "block_cache=1M:6:true", "block_cache=1M:6" and "block_cache=1M" are all valid option strings.

2) Corresponding unit tests are added.
Closes https://github.com/facebook/rocksdb/pull/3108

Differential Revision: D6420997

Pulled By: sagar0

fbshipit-source-id: cdea8b785688d2802907974af27225ccc1c0cd43
2017-11-28 10:48:53 -08:00
Zhongyi Xie
a6c6b8b38c Revert "No need for Restart Interval for meta blocks"
Summary:
See [issue 3169](https://github.com/facebook/rocksdb/issues/3169) for more information

This reverts commit 593d3de371.
Closes https://github.com/facebook/rocksdb/pull/3188

Differential Revision: D6379271

Pulled By: miasantreble

fbshipit-source-id: 88f9ed67ba52237ad9b6f7251db83672b62d7537
2017-11-20 16:42:03 -08:00
Maysam Yabandeh
30285ee31c Fix calculating filter partition target size
Summary:
block_size_deviation is in percentage while the partition size is in bytes. The current code fails to take that into account resulting into very large target size for filter partitions.
Closes https://github.com/facebook/rocksdb/pull/3187

Differential Revision: D6376069

Pulled By: maysamyabandeh

fbshipit-source-id: 276546fc68f50e0da32c462abb46f6cf676db9b2
2017-11-20 13:26:57 -08:00
Yi Wu
84a04af9a9 TableProperty::oldest_key_time defaults to 0
Summary:
We don't propagate TableProperty::oldest_key_time on compaction and just write the default value to SST files. It is more natural to default the value to 0.

Also revert db_sst_test back to before #2842.
Closes https://github.com/facebook/rocksdb/pull/3079

Differential Revision: D6165702

Pulled By: yiwu-arbug

fbshipit-source-id: ca3ce5928d96ae79a5beb12bb7d8c640a71478a0
2017-10-27 15:00:05 -07:00
Yi Wu
66a2c44ef4 Add DB::Properties::kEstimateOldestKeyTime
Summary:
With FIFO compaction we would like to get the oldest data time for monitoring. The problem is we don't have timestamp for each key in the DB. As an approximation, we expose the earliest of sst file "creation_time" property.

My plan is to override the property with a more accurate value with blob db, where we actually have timestamp.
Closes https://github.com/facebook/rocksdb/pull/2842

Differential Revision: D5770600

Pulled By: yiwu-arbug

fbshipit-source-id: 03833c8f10bbfbee62f8ea5c0d03c0cafb5d853a
2017-10-23 15:27:27 -07:00
Dmitri Smirnov
ebab2e2d42 Enable MSVC W4 with a few exceptions. Fix warnings and bugs
Summary: Closes https://github.com/facebook/rocksdb/pull/3018

Differential Revision: D6079011

Pulled By: yiwu-arbug

fbshipit-source-id: 988a721e7e7617967859dba71d660fc69f4dff57
2017-10-19 10:57:12 -07:00
Yi Wu
60c09f5fbb print more table_options to info log
Summary:
print more table_options to info log
Closes https://github.com/facebook/rocksdb/pull/3003

Differential Revision: D6054490

Pulled By: yiwu-arbug

fbshipit-source-id: 8e6f96e08bdc906077b6c62ade419d7cb739110f
2017-10-13 14:42:26 -07:00
Yi Wu
31d3e41810 PinnableSlice move assignment
Summary:
Allow `std::move(pinnable_slice)`.
Closes https://github.com/facebook/rocksdb/pull/2997

Differential Revision: D6036782

Pulled By: yiwu-arbug

fbshipit-source-id: 583fb0419a97e437ff530f4305822341cd3381fa
2017-10-12 18:28:24 -07:00
Yi Wu
fb4ae4d810 fix DBImpl::NewInternalIterator super-version leak on failure
Summary:
Close #2955
Closes https://github.com/facebook/rocksdb/pull/2960

Differential Revision: D5962872

Pulled By: yiwu-arbug

fbshipit-source-id: a6472d5c015bea3dc476c572ff5a5c90259e6059
2017-10-11 14:57:43 -07:00
Manuel Ung
88ed1f6ea6 Allow upgrades from nullptr to some merge operator
Summary:
Currently, RocksDB does not allow reopening a preexisting DB with no merge operator defined, with a merge operator defined. This means that if a DB ever want to add a merge operator, there's no way to do so currently.

Fix this by adding a new verification type `kByNameAllowFromNull` which will allow old values to be nullptr, and new values to be non-nullptr.
Closes https://github.com/facebook/rocksdb/pull/2958

Differential Revision: D5961131

Pulled By: lth

fbshipit-source-id: 06179bebd0d90db3d43690b5eb7345e2d5bab1eb
2017-10-04 09:57:23 -07:00
Yi Wu
d1cab2b64e Add ValueType::kTypeBlobIndex
Summary:
Add kTypeBlobIndex value type, which will be used by blob db only, to insert a (key, blob_offset) KV pair. The purpose is to
1. Make it possible to open existing rocksdb instance as blob db. Existing value will be of kTypeIndex type, while value inserted by blob db will be of kTypeBlobIndex.
2. Make rocksdb able to detect if the db contains value written by blob db, if so return error.
3. Make it possible to have blob db optionally store value in SST file (with kTypeValue type) or as a blob value (with kTypeBlobIndex type).

The root db (DBImpl) basically pretended kTypeBlobIndex are normal value on write. On Get if is_blob is provided, return whether the value read is of kTypeBlobIndex type, or return Status::NotSupported() status if is_blob is not provided. On scan allow_blob flag is pass and if the flag is true, return wether the value is of kTypeBlobIndex type via iter->IsBlob().

Changes on blob db side will be in a separate patch.
Closes https://github.com/facebook/rocksdb/pull/2886

Differential Revision: D5838431

Pulled By: yiwu-arbug

fbshipit-source-id: 3c5306c62bc13bb11abc03422ec5cbcea1203cca
2017-10-03 09:11:23 -07:00
Zhongyi Xie
593d3de371 No need for Restart Interval for meta blocks
Summary:
In SST files, restart interval helps us search in data blocks. However, some meta blocks will be read sequentially, so there's no need for restart points. Restart interval will introduce extra space in the block (https://github.com/facebook/rocksdb/blob/master/table/block_builder.cc#L80). We will see if we can remove this redundant space. (Maybe set restart interval to infinite.)
Closes https://github.com/facebook/rocksdb/pull/2940

Differential Revision: D5930139

Pulled By: miasantreble

fbshipit-source-id: 92b1b23c15cffa90378343ac846b713623b19c21
2017-09-29 20:26:20 -07:00
Maysam Yabandeh
ab0542f5ec Fix for when block.cache_handle is nullptr
Summary:
When using with compressed cache it is possible that the status is ok but the block is not actually added to the block cache. The patch takes this case into account.
Closes https://github.com/facebook/rocksdb/pull/2945

Differential Revision: D5937613

Pulled By: maysamyabandeh

fbshipit-source-id: 5428cf1115e5046b3d01ab78d26cb181122af4c6
2017-09-29 07:56:55 -07:00
Sagar Vemuri
93c2b91740 Introduce conditional merge-operator invocation in point lookups
Summary:
For every merge operand encountered for a key in the read path we now have the ability to decide whether to look further (to retrieve more merge operands for the key) or stop and invoke the merge operator to return the value. The user needs to override `ShouldMerge()` method with a condition to terminate search when true to avail this facility.

This has a couple of advantages:
1. It helps in limiting the number of merge operands that are looked at to compute a value as part of a user Get operation.
2. It allows to peek at a merge key-value to see if further merge operands need to look at.

Example: Limiting the number of merge operands that are looked at: Lets say you have 10 merge operands for a key spread over various levels. If you only want RocksDB to look at the latest two merge operands instead of all 10 to compute the value, it is now possible with this PR. You can set the condition in `ShouldMerge()` to return true when the size of the operand list is 2. Look at the example implementation in the unit test. Without this PR, a Get might look at all the 10 merge operands in different levels before invoking the merge-operator.

Added a new unit test.
Made sure that there is no perf regression by running benchmarks.

Command line to Load data:
```
TEST_TMPDIR=/dev/shm ./db_bench --benchmarks="mergerandom" --merge_operator="uint64add" --num=10000000
...
mergerandom  :      12.861 micros/op 77757 ops/sec;    8.6 MB/s ( updates:10000000)
```

**ReadRandomMergeRandom bechmark results:**
Command line:
```
TEST_TMPDIR=/dev/shm ./db_bench --benchmarks="readrandommergerandom" --merge_operator="uint64add" --num=10000000
```

Base -- Without this code change (on commit fc7476b):
```
readrandommergerandom :      38.586 micros/op 25916 ops/sec; (reads:3001599 merges:6998401 total:10000000 hits:842235 maxlength:8)
```

With this code change:
```
readrandommergerandom :      38.653 micros/op 25870 ops/sec; (reads:3001599 merges:6998401 total:10000000 hits:842235 maxlength:8)
```
Closes https://github.com/facebook/rocksdb/pull/2923

Differential Revision: D5898239

Pulled By: sagar0

fbshipit-source-id: daefa325019f77968639a75c851d46352c2303ef
2017-09-28 15:58:49 -07:00
Andrew Kryczka
c2f6e45aa3 prevent nullptr dereference in table reader error case
Summary:
A user encountered segfault on the call to `CacheDependencies()`, probably because `NewIndexIterator()` failed before populating `*index_entry`. Let's avoid the call in that case.
Closes https://github.com/facebook/rocksdb/pull/2939

Differential Revision: D5928611

Pulled By: ajkr

fbshipit-source-id: 484be453dbb00e5e160e9c6a1bc933df7d80f574
2017-09-28 00:12:34 -07:00
Siying Dong
edcbb36944 Three code-level optimization to Iterator::Next()
Summary:
Three small optimizations:
(1) iter_->IsKeyPinned() shouldn't be called if read_options.pin_data is not true. This may trigger function call all the way down the iterator tree.
(2) reuse the iterator key object in DBIter::FindNextUserEntryInternal(). The constructor of the class has some overheads.
(3) Move the switching direction logic in MergingIterator::Next() to a separate function.

These three in total improves readseq performance by about 3% in my benchmark setting.
Closes https://github.com/facebook/rocksdb/pull/2880

Differential Revision: D5829252

Pulled By: siying

fbshipit-source-id: 991aea10c6d6c3b43769cb4db168db62954ad1e3
2017-09-14 17:57:31 -07:00
Siying Dong
64b6452e0c Make InternalKeyComparator final and directly use it in merging iterator
Summary:
Merging iterator invokes InternalKeyComparator.Compare() frequently to heap merge. By making InternalKeyComparator final and merging iterator to directly use InternalKeyComparator rather than through Iterator interface, we can give compiler a choice to avoid one more virtual function call if possible. I ran readseq benchmark in memory-only use case to make sure the performance at least doesn't regress.

I have to disable the final key word in debug build, as a hack test class depends on overriding the class.
Closes https://github.com/facebook/rocksdb/pull/2860

Differential Revision: D5800461

Pulled By: siying

fbshipit-source-id: ab876f22a09bb5c560740911412336e0e25ccb53
2017-09-11 12:04:21 -07:00
Maysam Yabandeh
f46464d383 write-prepared txn: call IsInSnapshot
Summary:
This patch instruments the read path to verify each read value against an optional ReadCallback class. If the value is rejected, the reader moves on to the next value. The WritePreparedTxn makes use of this feature to skip sequence numbers that are not in the read snapshot.
Closes https://github.com/facebook/rocksdb/pull/2850

Differential Revision: D5787375

Pulled By: maysamyabandeh

fbshipit-source-id: 49d808b3062ab35e7ae98ad388f659757794184c
2017-09-11 09:14:48 -07:00
Andrew Kryczka
7fbb9eccaf support disabling checksum in block-based table
Summary:
store a zero as the checksum when disabled since it's easier to keep block trailer a fixed length.
Closes https://github.com/facebook/rocksdb/pull/2781

Differential Revision: D5694702

Pulled By: ajkr

fbshipit-source-id: 69cea9da415778ba2b600dfd9d0dfc8cb5188ecd
2017-08-23 19:40:47 -07:00
Andrew Kryczka
19cc66dc4f fix clang bug in block-based table reader
Summary:
This is the warning that clang considers a bug and has been causing it to fail:

```
table/block_based_table_reader.cc:240:27: warning: Potential leak of memory pointed to by 'block.value'
    for (; biter.Valid(); biter.Next()) {
                          ^~~~~
```

Actually clang just doesn't have enough knowledge to statically determine it's safe. We can teach it using an assert.
Closes https://github.com/facebook/rocksdb/pull/2779

Differential Revision: D5691225

Pulled By: ajkr

fbshipit-source-id: 3f0d545bf44636953b30ee5243c63239e8f16d8e
2017-08-23 15:12:05 -07:00
Andrew Kryczka
234f33a3f9 allow nullptr Slice only as sentinel
Summary:
Allow `Slice` holding nullptr as a sentinel value but not in comparisons. This new restriction eliminates the need for the manual checks in 39ef900551, while still conforming to glibc's `memcmp` API. Thanks siying for the idea. Users may need to migrate, so mentioned it in HISTORY.md.
Closes https://github.com/facebook/rocksdb/pull/2777

Differential Revision: D5686016

Pulled By: ajkr

fbshipit-source-id: 03a2ca3fd9a0ebade9d0d5686c81d59a9534f563
2017-08-23 10:56:06 -07:00
Maysam Yabandeh
1dfcdb15f9 Extend pin_l0 to filter partitions
Summary:
This is the continuation of https://github.com/facebook/rocksdb/pull/2661 for filter partitions. When pin_l0 is set (along with cache_xxx), then open table open the filter partitions are loaded into the cache and pinned there.
Closes https://github.com/facebook/rocksdb/pull/2766

Differential Revision: D5671098

Pulled By: maysamyabandeh

fbshipit-source-id: 174f24018f1d7f1129621e7380287b65b67d2115
2017-08-23 07:56:08 -07:00
Maysam Yabandeh
1efc600ddf Preload l0 index partitions
Summary:
This fixes the existing logic for pinning l0 index partitions. The patch preloads the partitions into block cache and pin them if they belong to level 0 and pin_l0 is set.

The drawback is that it does many small IOs when preloading all the partitions into the cache is direct io is enabled. Working for a solution for that.
Closes https://github.com/facebook/rocksdb/pull/2661

Differential Revision: D5554010

Pulled By: maysamyabandeh

fbshipit-source-id: 1e6f32a3524d71355c77d4138516dcfb601ca7b2
2017-08-18 10:56:20 -07:00
Siying Dong
666a005f9b Support prefetch last 512KB with direct I/O in block based file reader
Summary:
Right now, if direct I/O is enabled, prefetching the last 512KB cannot be applied, except compaction inputs or readahead is enabled for iterators. This can create a lot of I/O for HDD cases. To solve the problem, the 512KB is prefetched in block based table if direct I/O is enabled. The prefetched buffer is passed in totegher with random access file reader, so that we try to read from the buffer before reading from the file. This can be extended in the future to support flexible user iterator readahead too.
Closes https://github.com/facebook/rocksdb/pull/2708

Differential Revision: D5593091

Pulled By: siying

fbshipit-source-id: ee36ff6d8af11c312a2622272b21957a7b5c81e7
2017-08-11 12:16:45 -07:00
Aaron G
7848f0b24c add VerifyChecksum() to db.h
Summary:
We need a tool to check any sst file corruption in the db.
It will check all the sst files in current version and read all the blocks (data, meta, index) with checksum verification. If any verification fails, the function will return non-OK status.
Closes https://github.com/facebook/rocksdb/pull/2498

Differential Revision: D5324269

Pulled By: lightmark

fbshipit-source-id: 6f8a272008b722402a772acfc804524c9d1a483b
2017-08-09 15:58:13 -07:00
Siying Dong
21696ba502 Replace dynamic_cast<>
Summary:
Replace dynamic_cast<> so that users can choose to build with RTTI off, so that they can save several bytes per object, and get tiny more memory available.
Some nontrivial changes:
1. Add Comparator::GetRootComparator() to get around the internal comparator hack
2. Add the two experiemental functions to DB
3. Add TableFactory::GetOptionString() to avoid unnecessary casting to get the option string
4. Since 3 is done, move the parsing option functions for table factory to table factory files too, to be symmetric.
Closes https://github.com/facebook/rocksdb/pull/2645

Differential Revision: D5502723

Pulled By: siying

fbshipit-source-id: fd13cec5601cf68a554d87bfcf056f2ffa5fbf7c
2017-07-28 16:27:16 -07:00
Andrew Kryczka
710411aea6 fix asan/valgrind for TableCache cleanup
Summary:
Breaking commit: d12691b86f

In the above commit, I moved the `TableCache` cleanup logic from `Version` destructor into `PurgeObsoleteFiles`. I missed cleaning up `TableCache` entries for the current `Version` during DB destruction.

This PR adds that logic to `VersionSet` destructor. One unfortunate side effect is now we're potentially deleting `TableReader`s after `column_family_set_.reset()`, which means we can't call `BlockBasedTableReader::Close` a second time as the block cache might already be destroyed.
Closes https://github.com/facebook/rocksdb/pull/2662

Differential Revision: D5515108

Pulled By: ajkr

fbshipit-source-id: 2cb820e19aa813e0d258d17f76b2d7b6b7ee0b18
2017-07-27 20:28:04 -07:00
Aaron Gao
8f553d3c52 remove unnecessary internal_comparator param in newIterator
Summary:
solved https://github.com/facebook/rocksdb/issues/2604
Closes https://github.com/facebook/rocksdb/pull/2648

Differential Revision: D5504875

Pulled By: lightmark

fbshipit-source-id: c14bb62ccbdc9e7bda9cd914cae4ea0765d882ee
2017-07-27 14:30:42 -07:00
Sagar Vemuri
72502cf227 Revert "comment out unused parameters"
Summary:
This reverts the previous commit 1d7048c598, which broke the build.

Did a `git revert 1d7048c`.
Closes https://github.com/facebook/rocksdb/pull/2627

Differential Revision: D5476473

Pulled By: sagar0

fbshipit-source-id: 4756ff5c0dfc88c17eceb00e02c36176de728d06
2017-07-21 18:26:26 -07:00
Victor Gao
1d7048c598 comment out unused parameters
Summary: This uses `clang-tidy` to comment out unused parameters (in functions, methods and lambdas) in fbcode. Cases that the tool failed to handle are fixed manually.

Reviewed By: igorsugak

Differential Revision: D5454343

fbshipit-source-id: 5dee339b4334e25e963891b519a5aa81fbf627b2
2017-07-21 14:57:44 -07:00
Siying Dong
ae28634e9f Remove some left-over BSD headers
Summary: Closes https://github.com/facebook/rocksdb/pull/2608

Differential Revision: D5444797

Pulled By: siying

fbshipit-source-id: 690581d03f37822e059a16085088e8e2d8a45016
2017-07-18 11:56:57 -07:00
Sushma Devendrappa
0655b58582 enable PinnableSlice for RowCache
Summary:
This patch enables using PinnableSlice for RowCache, changes include
not releasing the cache handle immediately after lookup in TableCache::Get, instead pass a Cleanble function which does Cache::RleaseHandle.
Closes https://github.com/facebook/rocksdb/pull/2492

Differential Revision: D5316216

Pulled By: maysamyabandeh

fbshipit-source-id: d2a684bd7e4ba73772f762e58a82b5f4fbd5d362
2017-07-17 15:08:30 -07:00
Daniel Black
cbaab30449 table/block.h: change memset
Summary:
In gcc-7 the following is an error identified by -Werror=class-memaccess

In file included from ./table/get_context.h:14:0,
                 from db/version_set.cc:43:
./table/block.h: In constructor ‘rocksdb::BlockReadAmpBitmap::BlockReadAmpBitmap(size_t, size_t, rocksdb::Statistics*)’:
./table/block.h:73:53: error: ‘void* memset(void*, int, size_t)’ clearing an object of type ‘struct std::atomic<unsigned int>’ with no trivial copy-assignment; use value-initialization instead [-Werror=class-memaccess]
     memset(bitmap_, 0, bitmap_size * kBytesPersEntry);
                                                     ^
In file included from ./db/version_set.h:23:0,
                 from db/version_set.cc:12:
/toolchain/include/c++/8.0.0/atomic:684:12: note: ‘struct std::atomic<unsigned int>’ declared here
     struct atomic<unsigned int> : __atomic_base<unsigned int>
            ^~~~~~~~~~~~~~~~~~~~

As a solution the default initializer can be applied in list context.

Signed-off-by: Daniel Black <daniel.black@au.ibm.com>
Closes https://github.com/facebook/rocksdb/pull/2561

Differential Revision: D5398714

Pulled By: siying

fbshipit-source-id: d883fb88ec7535eee60d551038fe91f14488be36
2017-07-17 10:41:56 -07:00
Yedidya Feldblum
f1a056e005 CodeMod: Prefer ADD_FAILURE() over EXPECT_TRUE(false), et cetera
Summary:
CodeMod: Prefer `ADD_FAILURE()` over `EXPECT_TRUE(false)`, et cetera.

The tautologically-conditioned and tautologically-contradicted boolean expectations/assertions have better alternatives: unconditional passes and failures.

Reviewed By: Orvid

Differential Revision:
D5432398

Tags: codemod, codemod-opensource

fbshipit-source-id: d16b447e8696a6feaa94b41199f5052226ef6914
2017-07-16 21:26:02 -07:00
Siying Dong
3c327ac2d0 Change RocksDB License
Summary: Closes https://github.com/facebook/rocksdb/pull/2589

Differential Revision: D5431502

Pulled By: siying

fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
2017-07-15 16:11:23 -07:00
奏之章
70440f7a63 Add virtual func IsDeleteRangeSupported
Summary:
this modify allows third-party tables able to support delete range
Closes https://github.com/facebook/rocksdb/pull/2035

Differential Revision: D5407973

Pulled By: ajkr

fbshipit-source-id: 82e364b7dd5a198660788d59543f15b8f95cc418
2017-07-12 16:58:45 -07:00
Daniel Black
7a0b5de771 Gcc 7 ignored quantifiers
Summary:
The casting seemed to cause a problem.

I think this might increase it to unsigned long.
Closes https://github.com/facebook/rocksdb/pull/2562

Differential Revision: D5406842

Pulled By: siying

fbshipit-source-id: 736adef31448229a58a1a48bdbe77792f36736e8
2017-07-12 09:41:15 -07:00
Maysam Yabandeh
98669b5356 init filters_in_partition_
Summary:
Valgrind reports that it is not initialized.
Closes https://github.com/facebook/rocksdb/pull/2541

Differential Revision: D5376084

Pulled By: maysamyabandeh

fbshipit-source-id: 55c312f4f506863aa0d25ff92c8c34b57f48b860
2017-07-06 08:48:53 -07:00
Maysam Yabandeh
0013bf14ef fix asan and valgrind leak report in test
Summary: Closes https://github.com/facebook/rocksdb/pull/2537

Differential Revision: D5371433

Pulled By: maysamyabandeh

fbshipit-source-id: 90d3e8bb1a8576f48b1ddf1bdbba5512b5986ba0
2017-07-05 19:11:39 -07:00
Maysam Yabandeh
f6b9d9355e Fix clang error in PartitionedFilterBlockBuilder
Summary: Closes https://github.com/facebook/rocksdb/pull/2536

Differential Revision: D5371271

Pulled By: maysamyabandeh

fbshipit-source-id: f1355ac658a79c9982a24986f0925c9e24fc39d5
2017-07-05 11:16:04 -07:00
Maysam Yabandeh
45b9bb0331 Cut filter partition based on metadata_block_size
Summary:
Currently metadata_block_size controls only index partition size. With this patch a partition is cut after any of index or filter partitions reaches metadata_block_size.
Closes https://github.com/facebook/rocksdb/pull/2452

Differential Revision: D5275651

Pulled By: maysamyabandeh

fbshipit-source-id: 5057e4424b4c8902043782e6bf8c38f0c4f25160
2017-07-02 10:42:12 -07:00
Mike Kolupaev
397ab11152 Improve Status message for block checksum mismatches
Summary:
We've got some DBs where iterators return Status with message "Corruption: block checksum mismatch" all the time. That's not very informative. It would be much easier to investigate if the error message contained the file name - then we would know e.g. how old the corrupted file is, which would be very useful for finding the root cause. This PR adds file name, offset and other stuff to some block corruption-related status messages.

It doesn't improve all the error messages, just a few that were easy to improve. I'm mostly interested in "block checksum mismatch" and "Bad table magic number" since they're the only corruption errors that I've ever seen in the wild.
Closes https://github.com/facebook/rocksdb/pull/2507

Differential Revision: D5345702

Pulled By: al13n321

fbshipit-source-id: fc8023d43f1935ad927cef1b9c55481ab3cb1339
2017-06-28 21:27:01 -07:00
Sagar Vemuri
1cd45cd1b3 FIFO Compaction with TTL
Summary:
Introducing FIFO compactions with TTL.

FIFO compaction is based on size only which makes it tricky to enable in production as use cases can have organic growth. A user requested an option to drop files based on the time of their creation instead of the total size.

To address that request:
- Added a new TTL option to FIFO compaction options.
- Updated FIFO compaction score to take TTL into consideration.
- Added a new table property, creation_time, to keep track of when the SST file is created.
- Creation_time is set as below:
  - On Flush: Set to the time of flush.
  - On Compaction: Set to the max creation_time of all the files involved in the compaction.
  - On Repair and Recovery: Set to the time of repair/recovery.
  - Old files created prior to this code change will have a creation_time of 0.
- FIFO compaction with TTL is enabled when ttl > 0. All files older than ttl will be deleted during compaction. i.e. `if (file.creation_time < (current_time - ttl)) then delete(file)`. This will enable cases where you might want to delete all files older than, say, 1 day.
- FIFO compaction will fall back to the prior way of deleting files based on size if:
  - the creation_time of all files involved in compaction is 0.
  - the total size (of all SST files combined) does not drop below `compaction_options_fifo.max_table_files_size` even if the files older than ttl are deleted.

This feature is not supported if max_open_files != -1 or with table formats other than Block-based.

**Test Plan:**
Added tests.

**Benchmark results:**
Base: FIFO with max size: 100MB ::
```
svemuri@dev15905 ~/rocksdb (fifo-compaction) $ TEST_TMPDIR=/dev/shm ./db_bench --benchmarks=readwhilewriting --num=5000000 --threads=16 --compaction_style=2 --fifo_compaction_max_table_files_size_mb=100

readwhilewriting :       1.924 micros/op 519858 ops/sec;   13.6 MB/s (1176277 of 5000000 found)
```

With TTL (a low one for testing) ::
```
svemuri@dev15905 ~/rocksdb (fifo-compaction) $ TEST_TMPDIR=/dev/shm ./db_bench --benchmarks=readwhilewriting --num=5000000 --threads=16 --compaction_style=2 --fifo_compaction_max_table_files_size_mb=100 --fifo_compaction_ttl=20

readwhilewriting :       1.902 micros/op 525817 ops/sec;   13.7 MB/s (1185057 of 5000000 found)
```
Example Log lines:
```
2017/06/26-15:17:24.609249 7fd5a45ff700 (Original Log Time 2017/06/26-15:17:24.609177) [db/compaction_picker.cc:1471] [default] FIFO compaction: picking file 40 with creation time 1498515423 for deletion
2017/06/26-15:17:24.609255 7fd5a45ff700 (Original Log Time 2017/06/26-15:17:24.609234) [db/db_impl_compaction_flush.cc:1541] [default] Deleted 1 files
...
2017/06/26-15:17:25.553185 7fd5a61a5800 [DEBUG] [db/db_impl_files.cc:309] [JOB 0] Delete /dev/shm/dbbench/000040.sst type=2 #40 -- OK
2017/06/26-15:17:25.553205 7fd5a61a5800 EVENT_LOG_v1 {"time_micros": 1498515445553199, "job": 0, "event": "table_file_deletion", "file_number": 40}
```

SST Files remaining in the dbbench dir, after db_bench execution completed:
```
svemuri@dev15905 ~/rocksdb (fifo-compaction)  $ ls -l /dev/shm//dbbench/*.sst
-rw-r--r--. 1 svemuri users 30749887 Jun 26 15:17 /dev/shm//dbbench/000042.sst
-rw-r--r--. 1 svemuri users 30768779 Jun 26 15:17 /dev/shm//dbbench/000044.sst
-rw-r--r--. 1 svemuri users 30757481 Jun 26 15:17 /dev/shm//dbbench/000046.sst
```
Closes https://github.com/facebook/rocksdb/pull/2480

Differential Revision: D5305116

Pulled By: sagar0

fbshipit-source-id: 3e5cfcf5dd07ed2211b5b37492eb235b45139174
2017-06-27 17:11:48 -07:00
Siying Dong
5c97a7c066 Unit Tests for sync, range sync and file close failures
Summary: Closes https://github.com/facebook/rocksdb/pull/2454

Differential Revision: D5255320

Pulled By: siying

fbshipit-source-id: 0080830fa8eb5da6de25e17ba68aee91018c7913
2017-06-26 13:27:58 -07:00
Maysam Yabandeh
499ebb3ab5 Optimize for serial commits in 2PC
Summary:
Throughput: 46k tps in our sysbench settings (filling the details later)

The idea is to have the simplest change that gives us a reasonable boost
in 2PC throughput.

Major design changes:
1. The WAL file internal buffer is not flushed after each write. Instead
it is flushed before critical operations (WAL copy via fs) or when
FlushWAL is called by MySQL. Flushing the WAL buffer is also protected
via mutex_.
2. Use two sequence numbers: last seq, and last seq for write. Last seq
is the last visible sequence number for reads. Last seq for write is the
next sequence number that should be used to write to WAL/memtable. This
allows to have a memtable write be in parallel to WAL writes.
3. BatchGroup is not used for writes. This means that we can have
parallel writers which changes a major assumption in the code base. To
accommodate for that i) allow only 1 WriteImpl that intends to write to
memtable via mem_mutex_--which is fine since in 2PC almost all of the memtable writes
come via group commit phase which is serial anyway, ii) make all the
parts in the code base that assumed to be the only writer (via
EnterUnbatched) to also acquire mem_mutex_, iii) stat updates are
protected via a stat_mutex_.

Note: the first commit has the approach figured out but is not clean.
Submitting the PR anyway to get the early feedback on the approach. If
we are ok with the approach I will go ahead with this updates:
0) Rebase with Yi's pipelining changes
1) Currently batching is disabled by default to make sure that it will be
consistent with all unit tests. Will make this optional via a config.
2) A couple of unit tests are disabled. They need to be updated with the
serial commit of 2PC taken into account.
3) Replacing BatchGroup with mem_mutex_ got a bit ugly as it requires
releasing mutex_ beforehand (the same way EnterUnbatched does). This
needs to be cleaned up.
Closes https://github.com/facebook/rocksdb/pull/2345

Differential Revision: D5210732

Pulled By: maysamyabandeh

fbshipit-source-id: 78653bd95a35cd1e831e555e0e57bdfd695355a4
2017-06-24 14:11:29 -07:00
Maysam Yabandeh
0ac4afb975 Sanitize partitioning options
Summary:
We currently do not support partitioning filters if indexes are not partitioned. The patch makes sure that these two are consistent.
Closes https://github.com/facebook/rocksdb/pull/2455

Differential Revision: D5275644

Pulled By: maysamyabandeh

fbshipit-source-id: b61701ac8914c2206d06f5e33ff6f67b24406d1d
2017-06-23 18:30:01 -07:00
Maysam Yabandeh
6f4154d693 record index partition properties
Summary:
When Partitioning index/filter is enabled the user might need to check the index block size as well as the top-level index size via sst_dump. This patch records i) number of partitions, ii) top-level index size and make it accessible through sst_dump. The number of partitions for filters is the same as that of indexes. The top-level index for filters has a similar size to top-level index for indexes, so it is not repeated.
Closes https://github.com/facebook/rocksdb/pull/2437

Differential Revision: D5224225

Pulled By: maysamyabandeh

fbshipit-source-id: 5324598c75793523aef1bb7ee225a5475e95a9cb
2017-06-13 11:21:32 -07:00
Siying Dong
5582123dee Sample number of reads per SST file
Summary:
We estimate number of reads per SST files, by updating the counter per file in sampled read requests. This information can later be used to trigger compactions to improve read performacne.
Closes https://github.com/facebook/rocksdb/pull/2417

Differential Revision: D5193528

Pulled By: siying

fbshipit-source-id: b4241c5ad0eaf444b61afb53f8e6290d9f5da2df
2017-06-12 07:12:08 -07:00
Maysam Yabandeh
cc5f9339ee Fix concurrency issue with filter_block_set_
Summary:
filter_block_set_ access must also be protected with mutex.
Closes https://github.com/facebook/rocksdb/pull/2413

Differential Revision: D5193159

Pulled By: maysamyabandeh

fbshipit-source-id: 6987fc219d9a65c20b9c7e52151aef4b8e4882e6
2017-06-06 12:56:52 -07:00
Aaron Gao
7f6c02dda1 using ThreadLocalPtr to hide ROCKSDB_SUPPORT_THREAD_LOCAL from public…
Summary:
… headers

https://github.com/facebook/rocksdb/pull/2199 should not reference RocksDB-specific macros (like ROCKSDB_SUPPORT_THREAD_LOCAL in this case) to public headers, `iostats_context.h` and `perf_context.h`. We shouldn't do that because users have to provide these compiler flags when building their binary with RocksDB.

We should hide the thread local global variable inside our implementation and just expose a function api to retrieve these variables. It may break some users for now but good for long term.

make check -j64
Closes https://github.com/facebook/rocksdb/pull/2380

Differential Revision: D5177896

Pulled By: lightmark

fbshipit-source-id: 6fcdfac57f2e2dcfe60992b7385c5403f6dcb390
2017-06-02 17:26:19 -07:00
Mike Kolupaev
138b87eae4 Fix interaction between CompactionFilter::Decision::kRemoveAndSkipUnt…
Summary:
Fixes the following scenario:
 1. Set prefix extractor. Enable bloom filters, with `whole_key_filtering = false`. Use compaction filter that sometimes returns `kRemoveAndSkipUntil`.
 2. Do a compaction.
 3. Compaction creates an iterator with `total_order_seek = false`, calls `SeekToFirst()` on it, then repeatedly calls `Next()`.
 4. At some point compaction filter returns `kRemoveAndSkipUntil`.
 5. Compaction calls `Seek(skip_until)` on the iterator. The key that it seeks to happens to have prefix that doesn't match the bloom filter. Since `total_order_seek = false`, iterator becomes invalid, and compaction thinks that it has reached the end. The rest of the compaction input is silently discarded.

The fix is to make compaction iterator use `total_order_seek = true`.

The implementation for PlainTable is quite awkward. I've made `kRemoveAndSkipUntil` officially incompatible with PlainTable. If you try to use them together, compaction will fail, and DB will enter read-only mode (`bg_error_`). That's not a very graceful way to communicate a misconfiguration, but the alternatives don't seem worth the implementation time and complexity. To be able to check in advance that `kRemoveAndSkipUntil` is not going to be used with PlainTable, we'd need to extend the interface of either `CompactionFilter` or `InternalIterator`. It seems unlikely that anyone will ever want to use `kRemoveAndSkipUntil` with PlainTable: PlainTable probably has very few users, and `kRemoveAndSkipUntil` has only one user so far: us (logdevice).
Closes https://github.com/facebook/rocksdb/pull/2349

Differential Revision: D5110388

Pulled By: lightmark

fbshipit-source-id: ec29101a99d9dcd97db33923b87f72bce56cc17a
2017-06-02 15:11:38 -07:00
Andrew Kryczka
a4d9c02511 Pass CF ID to MemTableRepFactory
Summary:
Some users want to monitor column family activity in their custom memtable implementations. Previously there was no way to figure out with which column family a memtable is associated. This diff:

- adds an overload to MemTableRepFactory::CreateMemTableRep() that provides the CF ID. For compatibility, its default implementation calls the old overload.
- updates MemTable to create MemTableRep's using the new overload.
Closes https://github.com/facebook/rocksdb/pull/2346

Differential Revision: D5108061

Pulled By: ajkr

fbshipit-source-id: 3a1921214a348dd8ea0f54e1cab3b71c3d46d616
2017-06-02 12:12:06 -07:00
Aaron Gao
f7bb1a0060 support merge and delete in file ingestion
Summary:
Previously sst_file_writer only supports kTypeValue, we need kTypeMerge and kTypeDeletion also as user requested.
Closes https://github.com/facebook/rocksdb/pull/2361

Differential Revision: D5139402

Pulled By: lightmark

fbshipit-source-id: 092a60756d01692539d817a3765ebfd58a8d7f88
2017-05-26 12:11:21 -07:00
Giuseppe Ottaviano
69ec8356b2 Allow SstFileWriter to use the rate limiter
Summary:
The default IO priority of WritableFiles is IO_TOTAL, meaning that
they will bypass the rate limiter if it's passed in the options.

This change allows to pass an io priority in construction, so that by
setting IO_LOW or IO_HIGH the rate limit will be honored.

It also fixes a minor bug: SstFileWriter's copy and move constructor
are not disabled and incorrect, as any copy/move will result in a
double free. Switching to unique_ptr makes the object correctly
movable and non-copyable as expected.

Also fix minor style inconsistencies.
Closes https://github.com/facebook/rocksdb/pull/2335

Differential Revision: D5113260

Pulled By: sagar0

fbshipit-source-id: e084236e7ff0b50a56cbeceaa9fedd5e210bf9f8
2017-05-23 11:42:09 -07:00
Siying Dong
9bbba4fec1 Remoe unused BlockBasedTable::compaction_optimized_
Summary:
BlockBasedTable::compaction_optimized_ is never used but can cause TSAN warning. Remove it.
Closes https://github.com/facebook/rocksdb/pull/2324

Differential Revision: D5085533

Pulled By: siying

fbshipit-source-id: 2feefce6806d559dfb4ab2989aa3db36752fe25d
2017-05-18 06:41:23 -07:00
yizhu.sun
f5ba131bf8 Fixed some spelling mistakes
Summary: Closes https://github.com/facebook/rocksdb/pull/2314

Differential Revision: D5079601

Pulled By: sagar0

fbshipit-source-id: ae5696fd735718f544435c64c3179c49b8c04349
2017-05-17 23:12:36 -07:00
hyunwoo
0ebdd70579 fixed typo
Summary:
fixed typo
Closes https://github.com/facebook/rocksdb/pull/2312

Differential Revision: D5079631

Pulled By: sagar0

fbshipit-source-id: e4c8d1d89b244ee69e9dea1dd013227cc5241026
2017-05-17 16:41:49 -07:00
Aaron Gao
259a00eaca unbiase readamp bitmap
Summary:
Consider BlockReadAmpBitmap with bytes_per_bit = 32. Suppose bytes [a, b) were used, while bytes [a-32, a)
 and [b+1, b+33) weren't used; more formally, the union of ranges passed to BlockReadAmpBitmap::Mark() contains [a, b) and doesn't intersect with [a-32, a) and [b+1, b+33). Then bits [floor(a/32), ceil(b/32)] will be set, and so the number of useful bytes will be estimated as (ceil(b/32) - floor(a/32)) * 32, which is on average equal to b-a+31.

An extreme example: if we use 1 byte from each block, it'll be counted as 32 bytes from each block.

It's easy to remove this bias by slightly changing the semantics of the bitmap. Currently each bit represents a byte range [i*32, (i+1)*32).

This diff makes each bit represent a single byte: i*32 + X, where X is a random number in [0, 31] generated when bitmap is created. So, e.g., if you read a single byte at random, with probability 31/32 it won't be counted at all, and with probability 1/32 it will be counted as 32 bytes; so, on average it's counted as 1 byte.

*But there is one exception: the last bit will always set with the old way.*

(*) - assuming read_amp_bytes_per_bit = 32.
Closes https://github.com/facebook/rocksdb/pull/2259

Differential Revision: D5035652

Pulled By: lightmark

fbshipit-source-id: bd98b1b9b49fbe61f9e3781d07f624e3cbd92356
2017-05-10 01:49:52 -07:00
Islam AbdelRahman
4897eb250b dont skip IO for filter blocks
Summary:
Based on my experience with linkbench, We should not skip loading bloom filter blocks when they are not available in block cache when using Iterator::Seek

Actually I am not sure why this behavior existed in the first place
Closes https://github.com/facebook/rocksdb/pull/2255

Differential Revision: D5010721

Pulled By: maysamyabandeh

fbshipit-source-id: 0af545a06ac4baeecb248706ec34d009c2480ca4
2017-05-09 09:52:02 -07:00
Maysam Yabandeh
40af2381ec Object lifetime in cache
Summary:
Any non-raw-data dependent object must be destructed before the table
    closes. There was a bug of not doing that for filter object. This patch
    fixes the bug and adds a unit test to prevent such bugs in future.
Closes https://github.com/facebook/rocksdb/pull/2246

Differential Revision: D5001318

Pulled By: maysamyabandeh

fbshipit-source-id: 6d8772e58765485868094b92964da82ef9730b6d
2017-05-05 23:20:01 -07:00
Aaron Gao
a30a696034 do not read next datablock if upperbound is reached
Summary:
Now if we have iterate_upper_bound set, we continue read until get a key >= upper_bound. For a lot of cases that neighboring data blocks have a user key gap between them, our index key will be a user key in the middle to get a shorter size. For example, if we have blocks:
[a b c d][f g h]
Then the index key for the first block will be 'e'.
then if upper bound is any key between 'd' and 'e', for example, d1, d2, ..., d99999999999, we don't have to read the second block and also know that we have done our iteration by reaching the last key that smaller the upper bound already.

This diff can reduce RA in most cases.
Closes https://github.com/facebook/rocksdb/pull/2239

Differential Revision: D4990693

Pulled By: lightmark

fbshipit-source-id: ab30ea2e3c6edf3fddd5efed3c34fcf7739827ff
2017-05-05 23:20:01 -07:00
Maysam Yabandeh
6798d1f3be Revert "Delete filter before closing the table"
Summary:
This reverts commit 89833577a8.
Closes https://github.com/facebook/rocksdb/pull/2240

Differential Revision: D4986982

Pulled By: maysamyabandeh

fbshipit-source-id: 56c4c07b7b5b7c6fe122d5c2f2199d221c8510c0
2017-05-02 13:46:39 -07:00
Maysam Yabandeh
89833577a8 Delete filter before closing the table
Summary:
Some filters such as partitioned filter have pointers to the table for which they are created. Therefore is they are stored in the block cache, the should be forcibly erased from block cache before closing the  table, which would result into deleting the object. Otherwise the destructor will be called later when the cache is lazily erasing the object, which having the parent table no longer existent it could result into undefined behavior.

Update: there will be still cases the filter is not removed from the cache since the table has not kept a pointer to the cache handle to be able to forcibly release it later. We make sure that the filter destructor does not access the table pointer to get around such cases.
Closes https://github.com/facebook/rocksdb/pull/2207

Differential Revision: D4941591

Pulled By: maysamyabandeh

fbshipit-source-id: 56fbab2a11cf447e1aa67caa30b58d7bd7ce5bbd
2017-05-01 19:19:37 -07:00
Maysam Yabandeh
47a09b0a88 Avoid pinning when row cache is accessed
Summary:
With row cache being enabled, table cache is doing a short circuit for reading data. This path needs to be updated to take advantage of pinnable slice. In the meanwhile we disabling pinning in this path.
Closes https://github.com/facebook/rocksdb/pull/2237

Differential Revision: D4982389

Pulled By: maysamyabandeh

fbshipit-source-id: 542630d0cf23cfb1f0c397da82e7053df7966591
2017-05-01 18:12:46 -07:00
Siying Dong
d616ebea23 Add GPLv2 as an alternative license.
Summary: Closes https://github.com/facebook/rocksdb/pull/2226

Differential Revision: D4967547

Pulled By: siying

fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
2017-04-27 18:06:12 -07:00
Tomas Kolda
04d58970cb AIX and Solaris Sparc Support
Summary:
Replacement of #2147

The change was squashed due to a lot of conflicts.
Closes https://github.com/facebook/rocksdb/pull/2194

Differential Revision: D4929799

Pulled By: siying

fbshipit-source-id: 5cd49c254737a1d5ac13f3c035f128e86524c581
2017-04-21 20:48:04 -07:00
Aaron Gao
6e8d6f429d readahead backwards from sst end
Summary:
prefetch some data from the end of the file for each compaction to reduce IO.
Closes https://github.com/facebook/rocksdb/pull/2149

Differential Revision: D4880576

Pulled By: lightmark

fbshipit-source-id: aa767cd1afc84c541837fbf1ad6c0d45b34d3932
2017-04-14 18:56:14 -07:00
Sagar Vemuri
343b59d6ee Move various string utility functions into string_util
Summary:
This is an effort to club all string related utility functions into one common place, in string_util, so that it is easier for everyone to know what string processing functions are available. Right now they seem to be spread out across multiple modules, like logging and options_helper.

Check the sub-commits for easier reviewing.
Closes https://github.com/facebook/rocksdb/pull/2094

Differential Revision: D4837730

Pulled By: sagar0

fbshipit-source-id: 344278a
2017-04-06 14:54:12 -07:00
Yi Wu
df6f5a3772 Move memtable related files into memtable directory
Summary:
Move memtable related files into memtable directory.
Closes https://github.com/facebook/rocksdb/pull/2087

Differential Revision: D4829242

Pulled By: yiwu-arbug

fbshipit-source-id: ca70ab6
2017-04-06 14:09:13 -07:00
Siying Dong
d2dce5611a Move some files under util/ to separate dirs
Summary:
Move some files under util/ to new directories env/, monitoring/ options/ and cache/
Closes https://github.com/facebook/rocksdb/pull/2090

Differential Revision: D4833681

Pulled By: siying

fbshipit-source-id: 2fd8bef
2017-04-05 19:09:16 -07:00
Aaron Gao
90cfd46458 update IterKey that can get user key and internal key explicitly
Summary:
to void future bug that caused by the mix of userkey/internalkey
Closes https://github.com/facebook/rocksdb/pull/2084

Differential Revision: D4825889

Pulled By: lightmark

fbshipit-source-id: 28411db
2017-04-04 14:24:20 -07:00
Maysam Yabandeh
e7731d119a Configure index partition size
Summary:
Allow the users to specify the target index partition size.

With this patch an index partition is cut before its estimated in-memory size goes above the configured value for metadata_block_size. The filter partitions are still cut right after an index partition is cut.
Closes https://github.com/facebook/rocksdb/pull/2041

Differential Revision: D4780216

Pulled By: maysamyabandeh

fbshipit-source-id: 95a0831
2017-03-28 12:09:12 -07:00
Maysam Yabandeh
34a70859bc Fix segmentation fault caused by #1961
Summary:
Fixes #1961 which causes a segfault when filter_policy is nullptr and both
pin_l0_filter_and_index_blocks_in_cache/cache_index_and_filter_blocks
are set.
Closes https://github.com/facebook/rocksdb/pull/2029

Differential Revision: D4764862

Pulled By: maysamyabandeh

fbshipit-source-id: 05bd695
2017-03-24 17:24:11 -07:00
Andrew Kryczka
a5c8b54340 fix a header include
Summary:
need to consistently include "rocksdb/persistent_cache.h" to fix internal build
Closes https://github.com/facebook/rocksdb/pull/2034

Differential Revision: D4768101

Pulled By: ajkr

fbshipit-source-id: 2ecb07f
2017-03-23 19:24:22 -07:00
Maysam Yabandeh
8b0097b49b Readers for partition filter
Summary:
This is the last split of this pull request: https://github.com/facebook/rocksdb/pull/1891 which includes the reader part as well as the tests.
Closes https://github.com/facebook/rocksdb/pull/1961

Differential Revision: D4672216

Pulled By: maysamyabandeh

fbshipit-source-id: 6a2b829
2017-03-22 09:24:15 -07:00
Islam AbdelRahman
e19163688b Add macros to include file name and line number during Logging
Summary:
current logging
```
2017/03/14-14:20:30.393432 7fedde9f5700 (Original Log Time 2017/03/14-14:20:30.393414) [default] Level summary: base level 1 max bytes base 268435456 files[1 0 0 0 0 0 0] max score 0.25
2017/03/14-14:20:30.393438 7fedde9f5700 [JOB 2] Try to delete WAL files size 61417909, prev total WAL file size 73820858, number of live WAL files 2.
2017/03/14-14:20:30.393464 7fedde9f5700 [DEBUG] [JOB 2] Delete /dev/shm/old_logging//MANIFEST-000001 type=3 #1 -- OK
2017/03/14-14:20:30.393472 7fedde9f5700 [DEBUG] [JOB 2] Delete /dev/shm/old_logging//000003.log type=0 #3 -- OK
2017/03/14-14:20:31.427103 7fedd49f1700 [default] New memtable created with log file: #9. Immutable memtables: 0.
2017/03/14-14:20:31.427179 7fedde9f5700 [JOB 3] Syncing log #6
2017/03/14-14:20:31.427190 7fedde9f5700 (Original Log Time 2017/03/14-14:20:31.427170) Calling FlushMemTableToOutputFile with column family [default], flush slots available 1, compaction slots allowed 1, compaction slots scheduled 1
2017/03/14-14:20:31.
Closes https://github.com/facebook/rocksdb/pull/1990

Differential Revision: D4708695

Pulled By: IslamAbdelRahman

fbshipit-source-id: cb8968f
2017-03-15 19:39:12 -07:00
Maysam Yabandeh
11526252cc Pinnableslice (2nd attempt)
Summary:
PinnableSlice

    Summary:
    Currently the point lookup values are copied to a string provided by the
    user. This incures an extra memcpy cost. This patch allows doing point lookup
    via a PinnableSlice which pins the source memory location (instead of
    copying their content) and releases them after the content is consumed
    by the user. The old API of Get(string) is translated to the new API
    underneath.

    Here is the summary for improvements:

    value 100 byte: 1.8% regular, 1.2% merge values
    value 1k byte: 11.5% regular, 7.5% merge values
    value 10k byte: 26% regular, 29.9% merge values
    The improvement for merge could be more if we extend this approach to
    pin the merge output and delay the full merge operation until the user
    actually needs it. We have put that for future work.

    PS:
    Sometimes we observe a small decrease in performance when switching from
    t5452014 to this patch but with the old Get(string) API. The d
Closes https://github.com/facebook/rocksdb/pull/1756

Differential Revision: D4391738

Pulled By: maysamyabandeh

fbshipit-source-id: 6f3edd3
2017-03-13 11:54:10 -07:00
Andrew Kryczka
f2817fb7f9 avoid ASSERT_EQ(false, ...);
Summary:
lately it fails on travis due to a compiler bug (see https://github.com/google/googletest/issues/322#issuecomment-125645145). interestingly it seems to affect occurrences of `ASSERT_EQ(false, ...);` but not `ASSERT_EQ(true, ...);`.
Closes https://github.com/facebook/rocksdb/pull/1958

Differential Revision: D4680742

Pulled By: ajkr

fbshipit-source-id: 291fe41
2017-03-08 22:24:16 -08:00
Maysam Yabandeh
54b434110e Builders for partition filter
Summary:
This is the second split of this pull request: https://github.com/facebook/rocksdb/pull/1891 which includes only the builder part. The testing will be included in the third split, where the reader is also included.
Closes https://github.com/facebook/rocksdb/pull/1952

Differential Revision: D4660272

Pulled By: maysamyabandeh

fbshipit-source-id: 36b3cf0
2017-03-07 13:54:12 -08:00
Maysam Yabandeh
a2f7a514d1 Refactoring
Summary:
This is the first split of https://github.com/facebook/rocksdb/pull/1891 and will be needed for the upcoming partitioned filter patch.
Closes https://github.com/facebook/rocksdb/pull/1949

Differential Revision: D4652152

Pulled By: maysamyabandeh

fbshipit-source-id: 9801778
2017-03-03 18:24:12 -08:00
Islam AbdelRahman
f89b3893c0 Remove skip_table_builder_flush and default it to true
Summary:
This option is needed to be enabled for Direct IO
and I cannot think of a reason where we need to disable it

remove it and default it to true
Closes https://github.com/facebook/rocksdb/pull/1944

Differential Revision: D4641088

Pulled By: IslamAbdelRahman

fbshipit-source-id: d7085b9
2017-03-02 16:54:10 -08:00
Aaron Gao
e877afa08b Remove bulk loading and auto_roll_logger in rocksdb_lite
Summary:
shrink lite size
Closes https://github.com/facebook/rocksdb/pull/1929

Differential Revision: D4622059

Pulled By: siying

fbshipit-source-id: 050b796
2017-02-28 11:09:11 -08:00
Andrew Kryczka
e67232cff5 Handle failed Finish() in SST file writer
Summary:
The assertion in Abandon() fails when called after Finish() fails. Finish() already closes the builder so there's no need to call Abandon().
Closes https://github.com/facebook/rocksdb/pull/1901

Differential Revision: D4601373

Pulled By: ajkr

fbshipit-source-id: e5678be
2017-02-23 15:39:16 -08:00
Sagar Vemuri
eb912a927e Remove disableDataSync option
Summary:
Remove disableDataSync, and another similarly named disable_data_sync options.
This is being done to simplify options, and also because the performance gains of this feature can be achieved by other methods.
Closes https://github.com/facebook/rocksdb/pull/1859

Differential Revision: D4541292

Pulled By: sagar0

fbshipit-source-id: 5b3a6ca
2017-02-13 11:09:13 -08:00
Maysam Yabandeh
69d5262c81 Two-level Indexes
Summary:
Partition Index blocks and use a Partition-index as a 2nd level index.

The two-level index can be used by setting
BlockBasedTableOptions::kTwoLevelIndexSearch as the index type and
configuring BlockBasedTableOptions::index_per_partition

t15539501
Closes https://github.com/facebook/rocksdb/pull/1814

Differential Revision: D4473535

Pulled By: maysamyabandeh

fbshipit-source-id: bffb87e
2017-02-06 16:39:12 -08:00
Dmitri Smirnov
0a4cdde50a Windows thread
Summary:
introduce new methods into a public threadpool interface,
- allow submission of std::functions as they allow greater flexibility.
- add Joining methods to the implementation to join scheduled and submitted jobs with
  an option to cancel jobs that did not start executing.
- Remove ugly `#ifdefs` between pthread and std implementation, make it uniform.
- introduce pimpl for a drop in replacement of the implementation
- Introduce rocksdb::port::Thread typedef which is a replacement for std::thread.  On Posix Thread defaults as before std::thread.
- Implement WindowsThread that allocates memory in a more controllable manner than windows std::thread with a replaceable implementation.
- should be no functionality changes.
Closes https://github.com/facebook/rocksdb/pull/1823

Differential Revision: D4492902

Pulled By: siying

fbshipit-source-id: c74cb11
2017-02-06 14:54:18 -08:00
Andrew Kryczka
b797e42157 Dump compression dictionary meta-block
Summary:
make sst_dump print size/contents of the dictionary meta-block for easier debugging
Closes https://github.com/facebook/rocksdb/pull/1837

Differential Revision: D4506399

Pulled By: ajkr

fbshipit-source-id: b9bf668
2017-02-03 12:39:16 -08:00
Islam AbdelRahman
574b543f80 Rename merger.h -> merging_iterator.h
Summary:
merger.h was always a confusing name for me, simply give the file a better name
Closes https://github.com/facebook/rocksdb/pull/1836

Differential Revision: D4505357

Pulled By: IslamAbdelRahman

fbshipit-source-id: 07b28d8
2017-02-02 16:54:19 -08:00
Andrew Kryczka
3b35134e4b Avoid cache lookups for range deletion meta-block
Summary:
I added the Cache::Ref() function a couple weeks ago (#1761) to make this feature possible. Like other meta-blocks, rep_->range_del_entry holds a cache handle to pin the range deletion block in uncompressed block cache for the duration of the table reader's lifetime. We can reuse this cache handle to create an iterator over this meta-block without any cache lookup. Ref() is used to increment the cache handle's refcount in case the returned iterator outlives the table reader.
Closes https://github.com/facebook/rocksdb/pull/1801

Differential Revision: D4458782

Pulled By: ajkr

fbshipit-source-id: 2883f10
2017-01-26 11:24:13 -08:00
Maysam Yabandeh
d0ba8ec8f9 Revert "PinnableSlice"
Summary:
This reverts commit 54d94e9c2c.

The pull request was landed by mistake.
Closes https://github.com/facebook/rocksdb/pull/1755

Differential Revision: D4391678

Pulled By: maysamyabandeh

fbshipit-source-id: 36d5149
2017-01-08 14:24:12 -08:00
Maysam Yabandeh
54d94e9c2c PinnableSlice
Summary:
Currently the point lookup values are copied to a string provided by the user.
This incures an extra memcpy cost. This patch allows doing point lookup
via a PinnableSlice which pins the source memory location (instead of
copying their content) and releases them after the content is consumed
by the user. The old API of Get(string) is translated to the new API
underneath.

 Here is the summary for improvements:
 1. value 100 byte: 1.8%  regular, 1.2% merge values
 2. value 1k   byte: 11.5% regular, 7.5% merge values
 3. value 10k byte: 26% regular,    29.9% merge values

 The improvement for merge could be more if we extend this approach to
 pin the merge output and delay the full merge operation until the user
 actually needs it. We have put that for future work.

PS:
Sometimes we observe a small decrease in performance when switching from
t5452014 to this patch but with the old Get(string) API. The difference
is a little and could be noise. More importantly it is safely
cancelled
Closes https://github.com/facebook/rocksdb/pull/1732

Differential Revision: D4374613

Pulled By: maysamyabandeh

fbshipit-source-id: a077f1a
2017-01-08 13:54:13 -08:00
Maysam Yabandeh
0712d541d1 Delegate Cleanables
Summary:
Cleanable objects will perform the registered cleanups when
they are destructed. We however rather to delay this cleaning like when
we are gathering the merge operands. Current approach is to create the
Cleanable object on heap (instead of on stack) and delay deleting it.

By allowing Cleanables to delegate their cleanups to another cleanable
object we can delay the cleaning without however the need to craete the
cleanable object on heap and keeping it around. This patch applies this
technique for the cleanups of BlockIter and shows improved performance
for some in-memory benchmarks:
+1.8% for merge worklaod, +6.4% for non-merge workload when the merge
operator is specified.
https://our.intern.facebook.com/intern/tasks?t=15168163

Non-merge benchmark:
TEST_TMPDIR=/dev/shm/v100nocomp/ ./db_bench --benchmarks=fillrandom
--num=1000000 -value_size=100 -compression_type=none

Reading random with no merge operator specified:
TEST_TMPDIR=/dev/shm/v100nocomp/ ./db_bench
--benchmarks="read
Closes https://github.com/facebook/rocksdb/pull/1711

Differential Revision: D4361163

Pulled By: maysamyabandeh

fbshipit-source-id: 9801e07
2016-12-29 15:54:19 -08:00
Islam AbdelRahman
d58ef52ba6 Allow SstFileWriter to Fadvise the file away from page cache
Summary:
Add `fadvise_trigger` option to `SstFileWriter`

If fadvise_trigger is passed with a non-zero value, SstFileWriter will invalidate the os page cache every `fadvise_trigger` bytes for the sst file
Closes https://github.com/facebook/rocksdb/pull/1731

Differential Revision: D4371246

Pulled By: IslamAbdelRahman

fbshipit-source-id: 91caff1
2016-12-29 15:09:19 -08:00
Yi Wu
ab48c165a9 Print cache options to info log
Summary:
Improve cache options logging to info log.
Also print the value of
cache_index_and_filter_blocks_with_high_priority.
Closes https://github.com/facebook/rocksdb/pull/1709

Differential Revision: D4358776

Pulled By: yiwu-arbug

fbshipit-source-id: 8f030a0
2016-12-22 14:54:19 -08:00
Yi Wu
5d1457dbbf Dump persistent cache options
Summary:
Dump persistent cache options
Closes https://github.com/facebook/rocksdb/pull/1679

Differential Revision: D4337019

Pulled By: yiwu-arbug

fbshipit-source-id: 3812f8a
2016-12-19 14:09:12 -08:00
Ding Ma
1a136c1f13 Expose file size
Summary:
add a new function to SstFileWriter that will tell the user how big is there file right now.
Closes https://github.com/facebook/rocksdb/pull/1686

Differential Revision: D4338868

Pulled By: mdyuki1016

fbshipit-source-id: c1ee16a
2016-12-16 18:39:12 -08:00
Daniel Black
5334d8b44c table/block_based_table_builder.cc: intentional fallthrough - comment to match gcc pattern
Summary:
The gcc-7 code for parsing comments (libcpp/lex.c) didn't match
the intentional fallthough in this comment.

table/block_based_table_builder.cc: In member function 'void rocksdb::BlockBasedTableBuilder::WriteRawBlock(const rocksdb::Slice&, rocksdb::CompressionType, rocksdb::BlockHandle*)':
table/block_based_table_builder.cc:754:22: error: this statement may fall through [-Werror=implicit-fallthrough=]
         assert(false);
                      ^
table/block_based_table_builder.cc:756:7: note: here
       case kCRC32c: {
       ^~~~
cc1plus: all warnings being treated as errors
Closes https://github.com/facebook/rocksdb/pull/1661

Differential Revision: D4318817

Pulled By: yiwu-arbug

fbshipit-source-id: e67d171
2016-12-13 13:54:15 -08:00
Islam AbdelRahman
67f37cf198 Allow user to specify a CF for SST files generated by SstFileWriter
Summary:
Allow user to explicitly specify that the generated file by SstFileWriter will be ingested in a specific CF.
This allow us to persist the CF id in the generated file
Closes https://github.com/facebook/rocksdb/pull/1615

Differential Revision: D4270422

Pulled By: IslamAbdelRahman

fbshipit-source-id: 7fb954e
2016-12-05 14:24:16 -08:00
Andrew Kryczka
fd43ee09da Range deletion microoptimizations
Summary:
- Made RangeDelAggregator's InternalKeyComparator member a reference-to-const so we don't need to copy-construct it. Also added InternalKeyComparator to ImmutableCFOptions so we don't need to construct one for each DBIter.
- Made MemTable::NewRangeTombstoneIterator and the table readers' NewRangeTombstoneIterator() functions return nullptr instead of NewEmptyInternalIterator to avoid the allocation. Updated callers accordingly.
Closes https://github.com/facebook/rocksdb/pull/1548

Differential Revision: D4208169

Pulled By: ajkr

fbshipit-source-id: 2fd65cf
2016-11-21 12:24:13 -08:00
Andrew Kryczka
fe349db57b Remove Arena in RangeDelAggregator
Summary:
The Arena construction/destruction introduced significant overhead to read-heavy workload just by creating empty vectors for its blocks, so avoid it in RangeDelAggregator.
Closes https://github.com/facebook/rocksdb/pull/1547

Differential Revision: D4207781

Pulled By: ajkr

fbshipit-source-id: 9d1c130
2016-11-19 14:24:12 -08:00
Siying Dong
a4eb7387b2 Allow plain table to store index on file with bloom filter disabled
Summary:
Currently plain table bloom filter is required if storing metadata on file. Remove the constraint.
Closes https://github.com/facebook/rocksdb/pull/1525

Differential Revision: D4190977

Pulled By: siying

fbshipit-source-id: be60442
2016-11-17 11:09:13 -08:00
Andrew Kryczka
327085b7b2 fix valgrind
Summary: Closes https://github.com/facebook/rocksdb/pull/1526

Differential Revision: D4191257

Pulled By: ajkr

fbshipit-source-id: d09dc76
2016-11-16 12:09:11 -08:00
Andrew Kryczka
48e8baebc0 Decouple data iterator and range deletion iterator in TableCache
Summary:
Previously we used TableCache::NewIterator() for multiple purposes (data
block iterator and range deletion iterator), and returned non-ok status in
the data block iterator. In one case where the caller only used the range
deletion block iterator (9e7cf3469b/db/version_set.cc (L965-L973)),
we didn't check/free the data block iterator containing non-ok status, which
caused a valgrind error.

So, this diff decouples creation of data block and range deletion block iterators,
and updates the callers accordingly. Both functions can return non-ok status
in an InternalIterator. Since the non-ok status is returned in an iterator that the
callers will definitely use, it should be more usable/less error-prone.
Closes https://github.com/facebook/rocksdb/pull/1513

Differential Revision: D4181423

Pulled By: ajkr

fbshipit-source-id: 835b8f5
2016-11-15 17:24:28 -08:00
Islam AbdelRahman
5ed650857d Fix SstFileWriter destructor
Summary:
If user did not call SstFileWriter::Finish() or called Finish() but it failed.
We need to abandon the builder, to avoid destructing it while it's open
Closes https://github.com/facebook/rocksdb/pull/1502

Differential Revision: D4171660

Pulled By: IslamAbdelRahman

fbshipit-source-id: ab6f434
2016-11-12 20:11:19 -08:00
Andrew Kryczka
307a4e80c8 sst_dump support for range deletion
Summary:
Change DumpTable() so we can see the range deletion meta-block.
Closes https://github.com/facebook/rocksdb/pull/1505

Differential Revision: D4172227

Pulled By: ajkr

fbshipit-source-id: ae35665
2016-11-12 09:39:23 -08:00
Andrew Kryczka
815f54afad Insert range deletion meta-block into block cache
Summary:
This handles two issues: (1) range deletion iterator sometimes outlives
the table reader that created it, in which case the block must not be destroyed
during table reader destruction; and (2) we prefer to read these range tombstone
meta-blocks from file fewer times.

- Extracted cache-populating logic from NewDataBlockIterator() into a separate function: MaybeLoadDataBlockToCache()
- Use MaybeLoadDataBlockToCache() to load range deletion meta-block and pin it through the reader's lifetime. This code reuse works since range deletion meta-block has same format as data blocks.
- Use NewDataBlockIterator() to create range deletion iterators, which uses block cache if enabled, otherwise reads the block from file. Either way, the underlying block won't disappear until after the iterator is destroyed.
Closes https://github.com/facebook/rocksdb/pull/1459

Differential Revision: D4123175

Pulled By: ajkr

fbshipit-source-id: 8f64281
2016-11-05 09:24:26 -07:00
Islam AbdelRahman
5c5d01ae74 Fix wrong comment (Maximum supported block size)
Summary:
We can support SST files >2GB but we don't support blocks >2GB
Closes https://github.com/facebook/rocksdb/pull/1465

Differential Revision: D4132140

Pulled By: yiwu-arbug

fbshipit-source-id: 63bf12d
2016-11-04 11:24:14 -07:00
Andrew Kryczka
f998c9790f DeleteRange Get support
Summary:
During Get()/MultiGet(), build up a RangeDelAggregator with range
tombstones as we search through live memtable, immutable memtables, and
SST files. This aggregator is then used by memtable.cc's SaveValue() and
GetContext::SaveValue() to check whether keys are covered.

added tests for Get on memtables/files; end-to-end tests mainly in https://reviews.facebook.net/D64761
Closes https://github.com/facebook/rocksdb/pull/1456

Differential Revision: D4111271

Pulled By: ajkr

fbshipit-source-id: 6e388d4
2016-11-03 18:54:20 -07:00
Andrew Kryczka
40a2e406f8 DeleteRange flush support
Summary:
Changed BuildTable() (used for flush) to (1) add range
tombstones to the aggregator, which is used by CompactionIterator to
determine which keys can be removed; and (2) add aggregator's range
tombstones to the table that is output for the flush.
Closes https://github.com/facebook/rocksdb/pull/1438

Differential Revision: D4100025

Pulled By: ajkr

fbshipit-source-id: cb01a70
2016-10-31 20:54:18 -07:00
Willem Jan Withagen
0aab5e55f0 FreeBSD: malloc_usable_size is in <malloc_np.h> (#1428)
Signed-off-by: Willem Jan Withagen <wjw@digiware.nl>
2016-10-28 10:44:52 -07:00
Aaron Gao
9de2f75216 revert Prev() in MergingIterator to use previous code in non-prefix-seek mode
Summary: Siying suggested to keep old code for normal mode prev() for safety

Test Plan: make check -j64

Reviewers: yiwu, andrewkr, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D65439
2016-10-24 13:13:01 -07:00
Aaron Gao
59a7c0337b Change ioptions to store user_comparator, fix bug
Summary:
change ioptions.comparator to user_comparator instread of internal_comparator.
Also change Comparator* to InternalKeyComparator* to make its type explicitly.

Test Plan: make all check -j64

Reviewers: andrewkr, sdong, yiwu

Reviewed By: yiwu

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D65121
2016-10-21 11:31:42 -07:00
Andrew Kryczka
a0ba0aa877 Fix uninitialized variable gcc error for MyRocks
Summary: make sure seq_ is properly initialized even if ParseInternalKey() fails.

Test Plan: run myrocks release tests

Reviewers: lightmark, mung, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D65199
2016-10-19 10:59:46 -07:00
Islam AbdelRahman
b88f8e87c5 Support SST files with Global sequence numbers [reland]
Summary:
reland https://reviews.facebook.net/D62523

- Update SstFileWriter to include a property for a global sequence number in the SST file `rocksdb.external_sst_file.global_seqno`
- Update TableProperties to be aware of the offset of each property in the file
- Update BlockBasedTableReader and Block to be able to honor the sequence number in `rocksdb.external_sst_file.global_seqno` property and use it to overwrite all sequence number in the file

Something worth mentioning is that we don't update the seqno in the index block since and when doing a binary search, the reason for that is that it's guaranteed that SST files with global seqno will have only one user_key and each key will have seqno=0 encoded in it, This mean that this key is greater than any other key with seqno> 0. That mean that we can actually keep the current logic for these blocks

Test Plan: unit tests

Reviewers: sdong, yhchiang

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D65211
2016-10-18 16:59:37 -07:00
Andrew Kryczka
6fbe96baf8 Compaction Support for Range Deletion
Summary:
This diff introduces RangeDelAggregator, which takes ownership of iterators
provided to it via AddTombstones(). The tombstones are organized in a two-level
map (snapshot stripe -> begin key -> tombstone). Tombstone creation avoids data
copy by holding Slices returned by the iterator, which remain valid thanks to pinning.

For compaction, we create a hierarchical range tombstone iterator with structure
matching the iterator over compaction input data. An aggregator based on that
iterator is used by CompactionIterator to determine which keys are covered by
range tombstones. In case of merge operand, the same aggregator is used by
MergeHelper. Upon finishing each file in the compaction, relevant range tombstones
are added to the output file's range tombstone metablock and file boundaries are
updated accordingly.

To check whether a key is covered by range tombstone, RangeDelAggregator::ShouldDelete()
considers tombstones in the key's snapshot stripe. When this function is used outside of
compaction, it also checks newer stripes, which can contain covering tombstones. Currently
the intra-stripe check involves a linear scan; however, in the future we plan to collapse ranges
within a stripe such that binary search can be used.

RangeDelAggregator::AddToBuilder() adds all range tombstones in the table's key-range
to a new table's range tombstone meta-block. Since range tombstones may fall in the gap
between files, we may need to extend some files' key-ranges. The strategy is (1) first file
extends as far left as possible and other files do not extend left, (2) all files extend right
until either the start of the next file or the end of the last range tombstone in the gap,
whichever comes first.

One other notable change is adding release/move semantics to ScopedArenaIterator
such that it can be used to transfer ownership of an arena-allocated iterator, similar to
how unique_ptr is used for malloc'd data.

Depends on D61473

Test Plan: compaction_iterator_test, mock_table, end-to-end tests in D63927

Reviewers: sdong, IslamAbdelRahman, wanning, yhchiang, lightmark

Reviewed By: lightmark

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62205
2016-10-18 12:04:56 -07:00
Aaron Gao
21e8daced5 fix assertion failure in Prev()
Summary:
fix assertion failure in db_stress.
It happens because of prefix seek key is larger than merge iterator key when they have the same user key

Test Plan: ./db_stress --max_background_compactions=1 --max_write_buffer_number=3 --sync=0 --reopen=20 --write_buffer_size=33554432 --delpercent=5 --log2_keys_per_lock=10 --block_size=16384 --allow_concurrent_memtable_write=0 --test_batches_snapshots=0 --max_bytes_for_level_base=67108864 --progress_reports=0 --mmap_read=0 --writepercent=35 --disable_data_sync=0 --readpercent=50 --subcompactions=4 --ops_per_thread=20000000 --memtablerep=skip_list --prefix_size=0 --target_file_size_multiplier=1 --column_families=1 --threads=32 --disable_wal=0 --open_files=500000 --destroy_db_initially=0 --target_file_size_base=16777216 --nooverwritepercent=1 --iterpercent=10 --max_key=100000000 --prefixpercent=0 --use_clock_cache=false --kill_random_test=888887 --cache_size=1048576 --verify_checksum=1

Reviewers: sdong, andrewkr, yiwu, yhchiang

Reviewed By: yhchiang

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D65025
2016-10-13 17:36:48 -07:00
Dmitri Smirnov
e489270980 Fix scoped arena iterator (#1387) 2016-10-12 11:16:16 -07:00
Aaron Gao
447f17127c new Prev() prefix support using SeekForPrev()
Summary:
1) The previous solution for Prev() prefix support is not clean.
Since I add api SeekForPrev(), now the Prev() can be symmetric to Next().
and we do not need SeekToLast() to be called in Prev() any more.

Also, Next() will Seek(prefix_seek_key_) to solve the problem of possible inconsistency between db_iter and merge_iter when
there is merge_operator. And prefix_seek_key is only refreshed when change direction to forward.

2) This diff also solves the bug of Iterator::SeekToLast() with iterate_upper_bound_ with prefix extractor.

add test cases for the above two cases.

There are some tests for the SeekToLast() in Prev(), I will clean them later.

Test Plan: make all check

Reviewers: IslamAbdelRahman, andrewkr, yiwu, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D63933
2016-10-11 13:54:26 -07:00
Yi Wu
991b585ee0 More block cache tickers
Summary: Adding several missing block cache tickers.

Test Plan:
  make all check

Reviewers: IslamAbdelRahman, yhchiang, lightmark

Reviewed By: lightmark

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D64881
2016-10-11 11:59:05 -07:00
Islam AbdelRahman
d062328977 Revert "Support SST files with Global sequence numbers"
This reverts commit ab01da5437.
2016-10-07 14:05:12 -07:00
Islam AbdelRahman
ab01da5437 Support SST files with Global sequence numbers
Summary:
- Update SstFileWriter to include a property for a global sequence number in the SST file `rocksdb.external_sst_file.global_seqno`
- Update TableProperties to be aware of the offset of each property in the file
- Update BlockBasedTableReader and Block to be able to honor the sequence number in `rocksdb.external_sst_file.global_seqno` property and use it to overwrite all sequence number in the file

Something worth mentioning is that we don't update the seqno in the index block since and when doing a binary search, the reason for that is that it's guaranteed that SST files with global seqno will have only one user_key and each key will have seqno=0 encoded in it, This mean that this key is greater than any other key with seqno> 0. That mean that we can actually keep the current logic for these blocks

Test Plan: unit tests

Reviewers: andrewkr, yhchiang, yiwu, sdong

Reviewed By: sdong

Subscribers: hcz, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D62523
2016-10-03 16:12:39 -07:00
Andrew Kryczka
6009c473c7 Store range tombstones in memtable
Summary:
- Store range tombstones in a separate MemTableRep instantiated with ColumnFamilyOptions::memtable_factory
- MemTable::NewRangeTombstoneIterator() returns a MemTableIterator over the separate MemTableRep
- Part of the read path is not implemented yet (i.e., MemTable::Get())

Test Plan: see unit tests

Reviewers: wanning

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62217
2016-09-30 09:06:43 -07:00
Aaron Gao
f517d9dd09 Add SeekForPrev() to Iterator
Summary:
Add new Iterator API, `SeekForPrev`: find the last key that <= target key
support prefix_extractor
support prefix_same_as_start
support upper_bound
not supported in iterators without Prev()

Also add tests in db_iter_test and db_iterator_test

Pass all tests
Cheers!

Test Plan: make all check -j64

Reviewers: andrewkr, yiwu, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D64149
2016-09-27 18:20:57 -07:00
panfengfeng
7afbb7420b solve the problem of table_factory_to_write_=nullptr (#1342) 2016-09-20 10:11:51 -07:00
rockeet
4c3f4496b5 Add TableBuilderOptions::level and relevant changes (#1335) 2016-09-17 22:30:43 -07:00
sdong
3edb9461b7 Avoid hard-coded sleep in EnvPosixTestWithParam.TwoPools
Summary: EnvPosixTestWithParam.TwoPools relies on explicit sleeping, so it sometimes fail. Fix it.

Test Plan: Run tests with high parallelism many times and make sure the test passes.

Reviewers: yiwu, andrewkr

Reviewed By: andrewkr

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D63417
2016-09-16 17:45:12 -07:00
Yi Wu
81747f1be6 Refactor MutableCFOptions
Summary:
* Change constructor of MutableCFOptions to depends only on ColumnFamilyOptions.
* Move `max_subcompactions`, `compaction_options_fifo` and `compaction_pri` to ImmutableCFOptions to make it clear that they are immutable.

Test Plan: existing unit tests.

Reviewers: yhchiang, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D63945
2016-09-13 21:11:59 -07:00
Islam AbdelRahman
1cca091298 Temporarily revert Prev() prefix support
Summary:
Temporarily revert commits for supporting prefix Prev() to unblock MyRocks and RocksDB release

These are the commits reverted

  - 6a14d55bd9
  - b18f9c9eac
  - db74b1a219
  - 2482d5fb45

Test Plan: make check -j64

Reviewers: sdong, lightmark

Reviewed By: lightmark

Subscribers: andrewkr, dhruba, yoshinorim

Differential Revision: https://reviews.facebook.net/D63789
2016-09-08 14:45:32 -07:00
sdong
607628d349 Support ZSTD with finalized format
Summary:
ZSTD 1.0.0 is coming. We can finally add a support of ZSTD without worrying about compatibility.
Still keep ZSTDNotFinal for compatibility reason.

Test Plan: Run all tests. Run db_bench with ZSTD version with RocksDB built with ZSTD 1.0 and older.

Reviewers: andrewkr, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: cyan, igor, IslamAbdelRahman, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D63141
2016-09-06 12:22:16 -07:00
Injun Song
ce1be2ce37 Fix build error on Windows (AppVeyor) (#1315)
Add 'cf_options' to source list and db_imple.cc

fix casting
2016-09-06 08:41:43 -07:00
sdong
f7669b40ba Fix Windows Build
Summary: Fix two Windows build problems.

Test Plan: Build on Windows and run all Linux tests.

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D63189
2016-09-02 17:10:28 -07:00
Yi Wu
a88677d2cf Remove ImmutableCFOptions from public API
Summary: There's no reference to ImmutableCFOptions elsewhere in /include/rocksdb. ImmutableCFOptions was introduced in this commit (5665e5e285) but later its reference in /include/rocksdb/table.h is removed.

Test Plan:
  make all check

Reviewers: IslamAbdelRahman, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: yhchiang, andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D63177
2016-09-02 14:16:31 -07:00
Aaron Gao
4590b53a4b add stats to Cache::LookUp()
Summary: basically for SimCache stats. I find most times it is hard to pass Statistics* to SimCache constructor.

Test Plan: make all check

Reviewers: andrewkr, sdong, yiwu

Reviewed By: yiwu

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62193
2016-09-01 13:50:39 -07:00
Islam AbdelRahman
8ce1b8440a Fix Travis on Mac
Summary: not sure why travis complain about this line, works fine on my mac

Test Plan: run on my mac

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D63045
2016-08-31 15:10:12 -07:00
Aaron Gao
db74b1a219 fix bug in merge_iterator when data race happens
Summary:
core dump when run
`./db_stress --max_background_compactions=1 --max_write_buffer_number=3 --sync=0 --reopen=20 --write_buffer_size=33554432 --delpercent=5 --log2_keys_per_lock=10 --block_size=16384 --allow_concurrent_memtable_write=1 --test_batches_snapshots=0 --max_bytes_for_level_base=67108864 --progress_reports=0 --mmap_read=1 --kill_prefix_blacklist=WritableFileWriter::Append,WritableFileWriter::WriteBuffered --writepercent=35 --disable_data_sync=0 --readpercent=50 --subcompactions=3 --ops_per_thread=20000000 --memtablerep=skip_list --prefix_size=0 --target_file_size_multiplier=1 --column_families=1 --db=/dev/shm/rocksdb/rocksdb_crashtest_whitebox --threads=32 --disable_wal=0 --open_files=500000 --destroy_db_initially=0 --target_file_size_base=16777216 --nooverwritepercent=1 --iterpercent=10 --max_key=100000000 --prefixpercent=0 --use_clock_cache=false --kill_random_test=189 --cache_size=1048576 --verify_checksum=1`
Actually the relevant flag is `--threads`, data race when --thread > 1 cause problem.
It is possible that multiple
threads read/write memtable simultaneously. After one thread
calls Prev(), another thread may insert a new key just between
the current key and the key next, which may cause the
assert(current_ == CurrentForward()) failure when the first
thread calls Next() again if in prefix seek mode

Test Plan: rerun db_stress with >1 thread / make all check -j64

Reviewers: sdong, andrewkr, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62979
2016-08-30 22:19:42 -07:00
Aaron Gao
b18f9c9eac add nullptr check to internal_prefix_transform
Summary: patch for D62361

Test Plan: make all check

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62883
2016-08-30 13:48:31 -07:00
Aaron Gao
2482d5fb45 support Prev() in prefix seek mode
Summary: As title, make sure Prev() works as expected with Next() when the current iter->key() in the range of the same prefix in prefix seek mode

Test Plan: make all check -j64 (add prefix_test with PrefixSeekModePrev test case)

Reviewers: andrewkr, sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: yoshinorim, andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D61419
2016-08-29 20:55:39 -07:00
Islam AbdelRahman
b49b92cf28 Introduce Read amplification bitmap (read amp statistics)
Summary:
Add ReadOptions::read_amp_bytes_per_bit option which allow us to create a bitmap for every data block we read
the bitmap will contain (block_size / read_amp_bytes_per_bit) bits.

We will use this bitmap to mark which bytes have been used of the block so we can calculate the read amplification

Test Plan: added new tests

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: yiwu, leveldb, march, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D58707
2016-08-26 18:55:58 -07:00
Aaron Gao
c7004840d2 store prefix_extractor_name in table
Summary:
Make sure prefix extractor name is stored in SST files and if DB is opened with a prefix extractor of a different name, prefix bloom is skipped when read the file.
Also add unit tests for that.

Test Plan:
before change:
```
Note: Google Test filter = BlockBasedTableTest.SkipPrefixBloomFilter
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from BlockBasedTableTest
[ RUN      ] BlockBasedTableTest.SkipPrefixBloomFilter
table/table_test.cc:1421: Failure
Value of: db_iter->Valid()
Actual: false
Expected: true
[  FAILED  ] BlockBasedTableTest.SkipPrefixBloomFilter (1 ms)
[----------] 1 test from BlockBasedTableTest (1 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (1 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] BlockBasedTableTest.SkipPrefixBloomFilter

1 FAILED TEST
```
after:
```
Note: Google Test filter = BlockBasedTableTest.SkipPrefixBloomFilter
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from BlockBasedTableTest
[ RUN      ] BlockBasedTableTest.SkipPrefixBloomFilter
[       OK ] BlockBasedTableTest.SkipPrefixBloomFilter (0 ms)
[----------] 1 test from BlockBasedTableTest (0 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (0 ms total)
[  PASSED  ] 1 test.
```

Reviewers: sdong, andrewkr, yiwu, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D61215
2016-08-26 11:46:32 -07:00
Aaron Gao
cec2c6436b fix data race in NewIndexIterator() in block_based_table_reader.cc
Summary: fixed data race described in https://github.com/facebook/rocksdb/issues/1267 and add regression test

Test Plan:
./table_test --gtest_filter=BlockBasedTableTest.NewIndexIteratorLeak
make all check -j64
core dump before fix. ok after fix.

Reviewers: andrewkr, sdong

Reviewed By: sdong

Subscribers: igor, andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62361
2016-08-23 18:20:41 -07:00
Yi Wu
4a16c32ece Option to cache index/filter blocks with priority
Summary:
Add option to block based table to insert index/filter blocks to block cache with priority. Combined with LRUCache with high_pri_pool_ratio, we can reserved space for index/filter blocks, make them less likely to be evicted.

Depends on D61977.

Test Plan: See unit test.

Reviewers: lightmark, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, march, leveldb

Differential Revision: https://reviews.facebook.net/D62241
2016-08-23 13:44:13 -07:00
Andrew Kryczka
ecf9003860 Fix bug in printing values for block-based table
Summary: value is not an InternalKey, we do not need to decode it

Test Plan:
setup:

  $ ldb put --create_if_missing=true k v
  $ ldb put --db=./tmp --create_if_missing k v
  $ ldb compact --db=./tmp

before:

  $ sst_dump --command=raw --file=./tmp/000004.sst
  ...
  terminate called after throwing an instance of 'std::length_error'

after:

  $ ./sst_dump --command=raw --file=./tmp/000004.sst
  $ cat tmp/000004_dump.txt
  ...
  ASCII  k : v
  ...

Reviewers: sdong, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D62301
2016-08-22 10:27:50 -07:00
Islam AbdelRahman
6a17b07ca8 Add TablePropertiesCollector support in SstFileWriter
Summary: Update SstFileWriter to use user TablePropertiesCollectors that are passed in Options

Test Plan: unittests

Reviewers: sdong

Reviewed By: sdong

Subscribers: jkedgar, andrewkr, hermanlee4, dhruba, yoshinorim

Differential Revision: https://reviews.facebook.net/D62253
2016-08-19 16:17:56 -07:00
Wanning Jiang
78837f5d61 TableBuilder / TableReader support for range deletion
Summary: 1. Range Deletion Tombstone structure 2. Modify Add() in table_builder to make it usable for adding range del tombstones 3. Expose NewTombstoneIterator() API in table_reader

Test Plan: table_test.cc (now BlockBasedTableBuilder::Add() only accepts InternalKey. I make table_test only pass InternalKey to BlockBasedTableBuidler. Also test writing/reading range deletion tombstones in table_test )

Reviewers: sdong, IslamAbdelRahman, lightmark, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D61473
2016-08-19 15:10:31 -07:00
Philipp Unterbrunner
deda159b55 Added min/max/avg data block size output to sst_dump
Summary: Added min/max/avg data block size output to sst_dump. Output was added to the end of BlockBasedTable::DumpDataBlocks, so it appears after the data block details, at the very end of the dump file.

Test Plan:
```
./db_bench --benchmarks=fillrandom
./sst_dump --file=/tmp/rocksdbtest-xyz/dbbench/000007.sst --command=raw
tail -n 6 /tmp/rocksdbtest-xyz/dbbench/000007_dump.txt
```
```
Data Block Summary:
--------------------------------------
  # data blocks: 11336
  min data block size: 903
  max data block size: 2268
  avg data block size: 2245.363356
```

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D61815
2016-08-12 16:34:11 -07:00
Islam AbdelRahman
b693ba68b5 Minor PinnedIteratorsManager Refactoring
Summary:
This diff include these simple change
- Rename ReleasePinnedIterators to ReleasePinnedData
- Rename PinIteratorIfNeeded to PinIterator
- Use std::vector directly in PinnedIteratorsManager instead of std::unique_ptr<std::vector>
- Generalize PinnedIteratorsManager by adding PinPtr which can pin any pointer

Test Plan: existing tests

Reviewers: sdong, yiwu, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D61305
2016-08-11 11:54:17 -07:00
omegaga
d51dc96a79 Experiments on column-aware encodings
Summary:
Experiments on column-aware encodings. Supported features: 1) extract data blocks from SST file and encode with specified encodings; 2) Decode encoded data back into row format; 3) Directly extract data blocks and write in row format (without prefix encoding); 4) Get column distribution statistics for column format; 5) Dump data blocks separated by columns in human-readable format.

There is still on-going work on this diff. More refactoring is necessary.

Test Plan: Wrote tests in `column_aware_encoding_test.cc`. More tests should be added.

Reviewers: sdong

Reviewed By: sdong

Subscribers: arahut, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D60027
2016-08-01 14:50:19 -07:00
omegaga
e70020e4f6 Only cache level 0 indexes and filter when opening table reader
Summary: In T8216281 we decided to disable prefetching the index and filter during opening table handlers during startup (max_open_files = -1).

Test Plan: Rely on `IndexAndFilterBlocksOfNewTableAddedToCache` to guarantee L0 indexes and filters are still cached and change `PinL0IndexAndFilterBlocksTest` to make sure other levels are not cached (maybe add one more test to test we don't cache other levels?)

Reviewers: sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59913
2016-07-20 11:23:31 -07:00
Islam AbdelRahman
68a8e6b8fa Introduce FullMergeV2 (eliminate memcpy from merge operators)
Summary:
This diff update the code to pin the merge operator operands while the merge operation is done, so that we can eliminate the memcpy cost, to do that we need a new public API for FullMerge that replace the std::deque<std::string> with std::vector<Slice>

This diff is stacked on top of D56493 and D56511

In this diff we
- Update FullMergeV2 arguments to be encapsulated in MergeOperationInput and MergeOperationOutput which will make it easier to add new arguments in the future
- Replace std::deque<std::string> with std::vector<Slice> to pass operands
- Replace MergeContext std::deque with std::vector (based on a simple benchmark I ran https://gist.github.com/IslamAbdelRahman/78fc86c9ab9f52b1df791e58943fb187)
- Allow FullMergeV2 output to be an existing operand

```
[Everything in Memtable | 10K operands | 10 KB each | 1 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="mergerandom,readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --merge_keys=10000 --num=10000 --disable_auto_compactions --value_size=10240 --write_buffer_size=1000000000

[FullMergeV2]
readseq      :       0.607 micros/op 1648235 ops/sec; 16121.2 MB/s
readseq      :       0.478 micros/op 2091546 ops/sec; 20457.2 MB/s
readseq      :       0.252 micros/op 3972081 ops/sec; 38850.5 MB/s
readseq      :       0.237 micros/op 4218328 ops/sec; 41259.0 MB/s
readseq      :       0.247 micros/op 4043927 ops/sec; 39553.2 MB/s

[master]
readseq      :       3.935 micros/op 254140 ops/sec; 2485.7 MB/s
readseq      :       3.722 micros/op 268657 ops/sec; 2627.7 MB/s
readseq      :       3.149 micros/op 317605 ops/sec; 3106.5 MB/s
readseq      :       3.125 micros/op 320024 ops/sec; 3130.1 MB/s
readseq      :       4.075 micros/op 245374 ops/sec; 2400.0 MB/s
```

```
[Everything in Memtable | 10K operands | 10 KB each | 10 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="mergerandom,readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --merge_keys=1000 --num=10000 --disable_auto_compactions --value_size=10240 --write_buffer_size=1000000000

[FullMergeV2]
readseq      :       3.472 micros/op 288018 ops/sec; 2817.1 MB/s
readseq      :       2.304 micros/op 434027 ops/sec; 4245.2 MB/s
readseq      :       1.163 micros/op 859845 ops/sec; 8410.0 MB/s
readseq      :       1.192 micros/op 838926 ops/sec; 8205.4 MB/s
readseq      :       1.250 micros/op 800000 ops/sec; 7824.7 MB/s

[master]
readseq      :      24.025 micros/op 41623 ops/sec;  407.1 MB/s
readseq      :      18.489 micros/op 54086 ops/sec;  529.0 MB/s
readseq      :      18.693 micros/op 53495 ops/sec;  523.2 MB/s
readseq      :      23.621 micros/op 42335 ops/sec;  414.1 MB/s
readseq      :      18.775 micros/op 53262 ops/sec;  521.0 MB/s

```

```
[Everything in Block cache | 10K operands | 10 KB each | 1 operand per key]

[FullMergeV2]
$ DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --num=100000 --db="/dev/shm/merge-random-10K-10KB" --cache_size=1000000000 --use_existing_db --disable_auto_compactions
readseq      :      14.741 micros/op 67837 ops/sec;  663.5 MB/s
readseq      :       1.029 micros/op 971446 ops/sec; 9501.6 MB/s
readseq      :       0.974 micros/op 1026229 ops/sec; 10037.4 MB/s
readseq      :       0.965 micros/op 1036080 ops/sec; 10133.8 MB/s
readseq      :       0.943 micros/op 1060657 ops/sec; 10374.2 MB/s

[master]
readseq      :      16.735 micros/op 59755 ops/sec;  584.5 MB/s
readseq      :       3.029 micros/op 330151 ops/sec; 3229.2 MB/s
readseq      :       3.136 micros/op 318883 ops/sec; 3119.0 MB/s
readseq      :       3.065 micros/op 326245 ops/sec; 3191.0 MB/s
readseq      :       3.014 micros/op 331813 ops/sec; 3245.4 MB/s
```

```
[Everything in Block cache | 10K operands | 10 KB each | 10 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --num=100000 --db="/dev/shm/merge-random-10-operands-10K-10KB" --cache_size=1000000000 --use_existing_db --disable_auto_compactions

[FullMergeV2]
readseq      :      24.325 micros/op 41109 ops/sec;  402.1 MB/s
readseq      :       1.470 micros/op 680272 ops/sec; 6653.7 MB/s
readseq      :       1.231 micros/op 812347 ops/sec; 7945.5 MB/s
readseq      :       1.091 micros/op 916590 ops/sec; 8965.1 MB/s
readseq      :       1.109 micros/op 901713 ops/sec; 8819.6 MB/s

[master]
readseq      :      27.257 micros/op 36687 ops/sec;  358.8 MB/s
readseq      :       4.443 micros/op 225073 ops/sec; 2201.4 MB/s
readseq      :       5.830 micros/op 171526 ops/sec; 1677.7 MB/s
readseq      :       4.173 micros/op 239635 ops/sec; 2343.8 MB/s
readseq      :       4.150 micros/op 240963 ops/sec; 2356.8 MB/s
```

Test Plan: COMPILE_WITH_ASAN=1 make check -j64

Reviewers: yhchiang, andrewkr, sdong

Reviewed By: sdong

Subscribers: lovro, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57075
2016-07-20 09:49:03 -07:00
John Alexander
9430333f84 New Statistics to track Compression/Decompression (#1197)
* Added new statistics and refactored to allow ioptions to be passed around as required to access environment and statistics pointers (and, as a convenient side effect, info_log pointer).

* Prevent incrementing compression counter when compression is turned off in options.

* Prevent incrementing compression counter when compression is turned off in options.

* Added two more supported compression types to test code in db_test.cc

* Prevent incrementing compression counter when compression is turned off in options.

* Added new StatsLevel that excludes compression timing.

* Fixed casting error in coding.h

* Fixed CompressionStatsTest for new StatsLevel.

* Removed unused variable that was breaking the Linux build
2016-07-19 09:44:03 -07:00
Jay Edgar
efd013d6d8 Miscellaneous performance improvements
Summary:
I was investigating performance issues in the SstFileWriter and found all of the following:

- The SstFileWriter::Add() function created a local InternalKey every time it was called generating a allocation and free each time.  Changed to have an InternalKey member variable that can be reset with the new InternalKey::Set() function.
- In SstFileWriter::Add() the smallest_key and largest_key values were assigned the result of a ToString() call, but it is simpler to just assign them directly from the user's key.
- The Slice class had no move constructor so each time one was returned from a function a new one had to be allocated, the old data copied to the new, and the old one was freed.  I added the move constructor which also required a copy constructor and assignment operator.
- The BlockBuilder::CurrentSizeEstimate() function calculates the current estimate size, but was being called 2 or 3 times for each key added.  I changed the class to maintain a running estimate (equal to the original calculation) so that the function can return an already calculated value.
- The code in BlockBuilder::Add() that calculated the shared bytes between the last key and the new key duplicated what Slice::difference_offset does, so I replaced it with the standard function.
- BlockBuilder::Add() had code to copy just the changed portion into the last key value (and asserted that it now matched the new key).  It is more efficient just to copy the whole new key over.
- Moved this same code up into the 'if (use_delta_encoding_)' since the last key value is only needed when delta encoding is on.
- FlushBlockBySizePolicy::BlockAlmostFull calculated a standard deviation value each time it was called, but this information would only change if block_size of block_size_deviation changed, so I created a member variable to hold the value to avoid the calculation each time.
- Each PutVarint??() function has a buffer and calls std::string::append().  Two or three calls in a row could share a buffer and a single call to std::string::append().

Some of these will be helpful outside of the SstFileWriter.  I'm not 100% the addition of the move constructor is appropriate as I wonder why this wasn't done before - maybe because of compiler compatibility?  I tried it on gcc 4.8 and 4.9.

Test Plan: The changes should not affect the results so the existing tests should all still work and no new tests were added.  The value of the changes was seen by manually testing the SstFileWriter class through MyRocks and adding timing code to identify problem areas.

Reviewers: sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59607
2016-07-12 14:15:32 -07:00
Yi Wu
296545a2c7 Fix clang analyzer errors
Summary:
Fixing erros reported by clang static analyzer.
* Removing some unused variables.
* Adding assertions to fix false positives reported by clang analyzer.
* Adding `__clang_analyzer__` macro to suppress false positive warnings.

Test Plan:
    USE_CLANG=1 OPT=-g make analyze -j64

Reviewers: andrewkr, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D60549
2016-07-08 17:50:51 -07:00
sdong
32df9733d1 Add options.write_buffer_manager: control total memtable size across DB instances
Summary: Add option write_buffer_manager to help users control total memory spent on memtables across multiple DB instances.

Test Plan: Add a new unit test.

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: adela, benj, sumeet, muthu, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59925
2016-07-05 18:11:25 -07:00
Islam AbdelRahman
88a2776db5 Update SstFileWriter to use bottommost_compression if avaliable
Summary: SstFileWriter ignore Options::bottommost_compression, update it to use bottommost_compression if available

Test Plan:
make check -j64
verified used compression using ./sst_dump

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, yoshinorim

Differential Revision: https://reviews.facebook.net/D59841
2016-06-20 11:26:25 -07:00
Islam AbdelRahman
8366e10ffc Fix clang build
Summary: Fix clang build

Test Plan: USE_CLANG=1 make check -j64

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59667
2016-06-15 00:24:33 -07:00
Islam AbdelRahman
812dbfb483 Optimize BlockIter::Prev() by caching decoded entries
Summary:
Right now the way we do BlockIter::Prev() is like this

- Go to the beginning of the restart interval
- Keep moving forward (and decoding keys using ParseNextKey()) until we reach the desired key

This can be optimized by caching the decoded entries in the first pass and reusing them in consecutive BlockIter::Prev() calls

Before caching

```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readreverse" --db="/dev/shm/bench_prev_opt/" --use_existing_db --disable_auto_compactions
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.413 micros/op 2423972 ops/sec;  268.2 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.414 micros/op 2413867 ops/sec;  267.0 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.410 micros/op 2440881 ops/sec;  270.0 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.414 micros/op 2417298 ops/sec;  267.4 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.413 micros/op 2421682 ops/sec;  267.9 MB/s
```

After caching

```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readreverse" --db="/dev/shm/bench_prev_opt/" --use_existing_db --disable_auto_compactions
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.324 micros/op 3088955 ops/sec;  341.7 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.335 micros/op 2980999 ops/sec;  329.8 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.341 micros/op 2929681 ops/sec;  324.1 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.344 micros/op 2908490 ops/sec;  321.8 MB/s
DB path: [/dev/shm/bench_prev_opt/]
readreverse  :       0.338 micros/op 2958404 ops/sec;  327.3 MB/s
```

Test Plan: COMPILE_WITH_ASAN=1 make check -j64

Reviewers: andrewkr, yiwu, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, yoshinorim

Differential Revision: https://reviews.facebook.net/D59463
2016-06-14 12:27:46 -07:00
Islam AbdelRahman
7c919deccc Reuse TimedFullMerge instead of FullMerge + instrumentation
Summary:
We have alot of code duplication whenever we call FullMerge we keep duplicating the instrumentation and statistics code
This is a simple diff to refactor the code to use TimedFullMerge instead of FullMerge

Test Plan: COMPILE_WITH_ASAN=1 make check -j64

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59577
2016-06-13 16:17:26 -07:00
Nadav Rotem
7360db39e6 Add a check mode to verify compressed block can be decompressed back
Summary:
Try to decompress compressed blocks when a special flag is set.
assert and crash in debug builds if we can't decompress the just-compressed input.

Test Plan: Run unit-tests.

Reviewers: dhruba, andrewkr, sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59145
2016-06-10 18:20:54 -07:00
sdong
5009b5326b BlockBasedTable::FullFilterKeyMayMatch() Should skip prefix bloom if full key bloom exists
Summary: Currently, if users define both of full key bloom and prefix bloom in SST files. During Get(), if full key bloom shows the key may exist, we still go ahead and check prefix bloom. This is wasteful. If bloom filter for full keys exists, we should always ignore prefix bloom in Get().

Test Plan: Run existing tests

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57825
2016-06-10 16:27:56 -07:00
Aaron Gao
e532877940 Add statistics field to show total size of index and filter blocks in block cache
Summary: With `table_options.cache_index_and_filter_blocks = true`, index and filter blocks are stored in block cache. Then people are curious how much of the block cache total size is used by indexes and bloom filters. It will be nice we have a way to report that. It can help people tune performance and plan for optimized hardware setting. We add several enum values for db Statistics. BLOCK_CACHE_INDEX/FILTER_BYTES_INSERT - BLOCK_CACHE_INDEX/FILTER_BYTES_ERASE = current INDEX/FILTER total block size in bytes.

Test Plan:
write a test case called `DBBlockCacheTest.IndexAndFilterBlocksStats`. The result is:
```
[gzh@dev9927.prn1 ~/local/rocksdb]  make db_block_cache_test -j64 && ./db_block_cache_test --gtest_filter=DBBlockCacheTest.IndexAndFilterBlocksStats
Makefile:101: Warning: Compiling in debug mode. Don't use the resulting binary in production
  GEN      util/build_version.cc
  make: `db_block_cache_test' is up to date.
  Note: Google Test filter = DBBlockCacheTest.IndexAndFilterBlocksStats
  [==========] Running 1 test from 1 test case.
  [----------] Global test environment set-up.
  [----------] 1 test from DBBlockCacheTest
  [ RUN      ] DBBlockCacheTest.IndexAndFilterBlocksStats
  [       OK ] DBBlockCacheTest.IndexAndFilterBlocksStats (689 ms)
  [----------] 1 test from DBBlockCacheTest (689 ms total)

  [----------] Global test environment tear-down
  [==========] 1 test from 1 test case ran. (689 ms total)
  [  PASSED  ] 1 test.
```

Reviewers: IslamAbdelRahman, andrewkr, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D58677
2016-06-03 10:47:47 -07:00
sdong
1d725ca51d Deprecate BlockBasedTableOptions.hash_index_allow_collision=false.
Summary: Deprecate this one option and delete code and tests that are now superfluous.

Test Plan: all tests pass

Reviewers: igor, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: msalib, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D55317
2016-05-20 17:52:27 -07:00
Aaron Gao
43afd72bee [rocksdb] make more options dynamic
Summary:
make more ColumnFamilyOptions dynamic:
- compression
- soft_pending_compaction_bytes_limit
- hard_pending_compaction_bytes_limit
- min_partial_merge_operands
- report_bg_io_stats
- paranoid_file_checks

Test Plan:
Add sanity check in `db_test.cc` for all above options except for soft_pending_compaction_bytes_limit and hard_pending_compaction_bytes_limit.
All passed.

Reviewers: andrewkr, sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D57519
2016-05-17 13:11:56 -07:00
krad
a08c8c851a Added PersistentCache abstraction
Summary:
Added a new abstraction to cache page to RocksDB designed for the read
cache use.

RocksDB current block cache is more of an object cache. For the persistent read cache
project, what we need is a page cache equivalent. This changes adds a cache
abstraction to RocksDB to cache pages called PersistentCache. PersistentCache can cache
uncompressed pages or raw pages (content as in filesystem). The user can
choose to operate PersistentCache either in  COMPRESSED or UNCOMPRESSED mode.

Blame Rev:

Test Plan: Run unit tests

Reviewers: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D55707
2016-05-15 22:17:18 -07:00
Ashish Shenoy
fa3536d202 Store SST file compression algorithm as a TableProperty
Summary: Store SST file compression algorithm as a TableProperty.

Test Plan: Modified and ran the table_test UT that checks for TableProperties

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: lgalanis, andrewkr, dhruba, IslamAbdelRahman

Differential Revision: https://reviews.facebook.net/D58017
2016-05-12 09:47:16 -07:00
sdong
7ccb8d6ef3 BlockBasedTable::Get() not to use prefix bloom if read_options.total_order_seek = true
Summary: This is to provide a way for users to skip prefix bloom in point look-up.

Test Plan: Add a new unit test scenario.

Reviewers: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57747
2016-05-06 10:16:11 -07:00
Dmitri Smirnov
e7899c6618 Fix build issue. (#1103) 2016-04-28 11:39:12 -07:00
Li Peng
6d4832a998 Merge pull request #1101 from flyd1005/wip-fix-typo
fix typos and remove duplicated words
2016-04-28 02:30:44 -07:00
Andrew Kryczka
843d2e3137 Shared dictionary compression using reference block
Summary:
This adds a new metablock containing a shared dictionary that is used
to compress all data blocks in the SST file. The size of the shared dictionary
is configurable in CompressionOptions and defaults to 0. It's currently only
used for zlib/lz4/lz4hc, but the block will be stored in the SST regardless of
the compression type if the user chooses a nonzero dictionary size.

During compaction, computes the dictionary by randomly sampling the first
output file in each subcompaction. It pre-computes the intervals to sample
by assuming the output file will have the maximum allowable length. In case
the file is smaller, some of the pre-computed sampling intervals can be beyond
end-of-file, in which case we skip over those samples and the dictionary will
be a bit smaller. After the dictionary is generated using the first file in a
subcompaction, it is loaded into the compression library before writing each
block in each subsequent file of that subcompaction.

On the read path, gets the dictionary from the metablock, if it exists. Then,
loads that dictionary into the compression library before reading each block.

Test Plan: new unit test

Reviewers: yhchiang, IslamAbdelRahman, cyan, sdong

Reviewed By: sdong

Subscribers: andrewkr, yoshinorim, kradhakrishnan, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52287
2016-04-27 17:36:03 -07:00
Islam AbdelRahman
d719b095dc Introduce PinnedIteratorsManager (Reduce PinData() overhead / Refactor PinData)
Summary:
While trying to reuse PinData() / ReleasePinnedData() .. to optimize away some memcpys I realized that there is a significant overhead for using PinData() / ReleasePinnedData if they were called many times.
This diff refactor the pinning logic by introducing PinnedIteratorsManager a centralized component that will be created once and will be notified whenever we need to Pin an Iterator. This implementation have much less overhead than the original implementation

Test Plan:
make check -j64
COMPILE_WITH_ASAN=1 make check -j64

Reviewers: yhchiang, sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56493
2016-04-26 12:41:07 -07:00
Dhruba Borthakur
995353e46a Fix null-pointer-dereference detected by Infer (https://github.com/facebook/infer)
Test Plan: make check

Reviewers: leveldb, sdong

Reviewed By: sdong

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57165
2016-04-25 20:09:36 +01:00
Islam AbdelRahman
5bd4022fec Add comparator, merge operator, property collectors to SST file properties (again)
Summary:
This is the original diff that I have landed and reverted and now I want to land again https://reviews.facebook.net/D34269

For old SST files we will show
```
  comparator name: N/A
  merge operator name: N/A
  property collectors names: N/A
```

For new SST files with no merge operator name and with no property collectors
```
  comparator name: leveldb.BytewiseComparator
  merge operator name: nullptr
  property collectors names: []
```

for new SST files with these properties
```
  comparator name: leveldb.BytewiseComparator
  merge operator name: UInt64AddOperator
  property collectors names: [DummyPropertiesCollector1,DummyPropertiesCollector2]
```

Test Plan: unittests

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56487
2016-04-21 10:16:28 -07:00
Dmitri Smirnov
ee221d2de0 Introduce XPRESS compresssion on Windows. (#1081)
Comparable with Snappy on comp ratio.
  Implemented using Windows API, does not require external package.
  Avaiable since Windows 8 and server 2012.
  Use -DXPRESS=1 with CMake to enable.
2016-04-19 22:54:24 -07:00
Islam AbdelRahman
6356b4d516 Fix nullptr dereference in adaptive_table
Summary:
@dulmarod Ran infer on RocksDB and found that we dereference nullptr in adaptive_table
https://fb.facebook.com/groups/rocksdb/permalink/1046374415411173/

Test Plan: make check -j64

Reviewers: sdong, yhchiang, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56973
2016-04-19 13:57:05 -07:00
sdong
535af525d6 BlockBasedTable::PrefixMayMatch() to skip index checking if we can't find a filter block.
Summary:
In the case where we can't find a filter block, there is not much benefit of doing the binary search and see whether the index key has the prefix. With the change, we blindly return true if we can't get the filter.
It also fixes missing row cases for reverse comparator with full bloom.

Test Plan: Add a test case that used to fail.

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: kradhakrishnan, yiwu, hermanlee4, yoshinorim, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56697
2016-04-13 19:06:48 -07:00
sdong
dff4c48ede BlockBasedTable::PrefixMayMatch: no need to find data block after full bloom checking
Summary:
Full block checking should be a good enough indication of prefix existance. No need to further check data block.
This also fixes wrong results when using prefix bloom and reverse bitwise comparator.

Test Plan: Will add a unit test.

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: hermanlee4, yoshinorim, yiwu, kradhakrishnan, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56625
2016-04-12 16:25:54 -07:00
sdong
30d72ee43c PrefixTest.PrefixAndWholeKeyTest should run against a different directory from prefix_test
Summary: PrefixTest.PrefixAndWholeKeyTest runs against the same directory as prefix_test, which sometimes fail parallel tests. Fix it.

Test Plan: Run it in parallel and see it doesn't fail anymore.

Reviewers: andrewkr

Reviewed By: andrewkr

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56541
2016-04-11 13:02:56 -07:00
Andrew Kryczka
0e3cc2cf1f Add column family info to TableProperties::ToString()
Summary: This is used at least by `sst_dump --show_properties`

Test Plan:
- default CF

```
  $ ./sst_dump --show_properties --file=./tmp-db/000007.sst | grep 'column family'
  column family ID: 0
  column family name: default
```

- custom CF

```
  $ ./sst_dump --show_properties --file=./tmp-db/000012.sst | grep 'column family'
  column family ID: 1
  column family name: col-fam-1
```

- no CF

```
  $ ./sst_dump --show_properties --file=./tmp-db/000017.sst | grep 'column family'
  column family ID: N/A
  column family name: N/A
```

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56499
2016-04-08 18:50:18 -07:00
sdong
1518b733eb Change default number of cache shard bit to be 6 and max_file_opening_threads to be 16.
Summary: Cache shard bit 4 is sometimes too small and 6 is a more common value picked by users. Make that default. It shouldn't hurt much to change options.max_file_opening_threads default to be 16, which will reduce the worst case DB open time.

Test Plan: Run all existing tests.

Reviewers: IslamAbdelRahman, yhchiang, kradhakrishnan, igor, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, MarkCallaghan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D55047
2016-04-07 13:55:10 -07:00
Andrew Kryczka
2391ef7214 Embed column family name in SST file
Summary:
Added the column family name to the properties block. This property
is omitted only if the property is unavailable, such as when RepairDB()
writes SST files.

In a next diff, I will change RepairDB to use this new property for
deciding to which column family an existing SST file belongs. If this
property is missing, it will add it to the "unknown" column family (same
as its existing behavior).

Test Plan:
New unit test:

  $ ./db_table_properties_test --gtest_filter=DBTablePropertiesTest.GetColumnFamilyNameProperty

Reviewers: IslamAbdelRahman, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D55605
2016-04-06 23:10:32 -07:00
Marton Trencseni
9b51987521 Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes.
Summary:
When a block based table file is opened, if prefetch_index_and_filter is true, it will prefetch the index and filter blocks, putting them into the block cache.
What this feature adds: when a L0 block based table file is opened, if pin_l0_filter_and_index_blocks_in_cache is true in the options (and prefetch_index_and_filter is true), then the filter and index blocks aren't released back to the block cache at the end of BlockBasedTableReader::Open(). Instead the table reader takes ownership of them, hence pinning them, ie. the LRU cache will never push them out. Meanwhile in the table reader, further accesses will not hit the block cache, thus avoiding lock contention.

Test Plan:
'export TEST_TMPDIR=/dev/shm/ && DISABLE_JEMALLOC=1 OPT=-g make all valgrind_check -j32' is OK.
I didn't run the Java tests, I don't have Java set up on my devserver.

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56133
2016-04-01 10:42:39 -07:00
Laurent Demailly
21700a5106 to/from hex refactor
Summary:
Expose the inverse of ToString(hex=true) on Slice: Slice::DecodeHex
Refactor the other implementation of to/from hex in ldb_cmd.h to use the Slice
version
(Difference between the 2 is whether 0x is expected/produced in front of the hex
string or not)
Eliminated support for invalid odd length hex string - this is now invalid
instead of having 1/2 byte set
Added (inverse of HexToString) test for LDBCommand::StringToHex which also
indirectly tests Slice::ToString(true)

After moving the original implementation from ldb_cmd.h, updated it to much simpler/efficient version
(originally/inspired from https://github.com/facebook/wdt/blob/master/util/EncryptionUtils.cpp#L140-L169 )

Test Plan: run tests

Reviewers: uddipta, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56121
2016-03-30 14:36:48 -07:00
sdong
b1fafcaca6 Revert "Adding pin_l0_filter_and_index_blocks_in_cache feature."
This reverts commit 522de4f59e.

It has bug of index block cleaning up.
2016-03-21 11:50:42 -07:00
Marton Trencseni
522de4f59e Adding pin_l0_filter_and_index_blocks_in_cache feature.
Summary:
When a block based table file is opened, if prefetch_index_and_filter is true, it will prefetch the index and filter blocks, putting them into the block cache.
What this feature adds: when a L0 block based table file is opened, if pin_l0_filter_and_index_blocks_in_cache is true in the options (and prefetch_index_and_filter is true), then the filter and index blocks aren't released back to the block cache at the end of BlockBasedTableReader::Open(). Instead the table reader takes ownership of them, hence pinning them, ie. the LRU cache will never push them out. Meanwhile in the table reader, further accesses will not hit the block cache, thus avoiding lock contention.
When the table reader is destroyed, it releases the pinned blocks (if there were any). This has to happen before the cache is destroyed, so I had to introduce a TableReader::Close(), to guarantee the order of destruction.

Test Plan:
Added two unit tests for this. Existing unit tests run fine (default is pin_l0_filter_and_index_blocks_in_cache=false).

DISABLE_JEMALLOC=1 OPT=-g make all valgrind_check -j32
  Mac: OK.
  Linux: with D55287 patched in it's OK.

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D54801
2016-03-17 22:40:01 +00:00
Edouard A
02e62ebbc8 Fixes warnings and ensure correct int behavior on 32-bit platforms. 2016-03-16 22:57:57 +01:00
sdong
b2ae5950ba Index Reader should not be reused after DB restart
Summary:
In block based table reader, wow we put index reader to block cache, which can be retrieved after DB restart. However, index reader may reference internal comparator, which can be destroyed after DB restarts, causing problems.
Fix it by making cache key identical per table reader.

Test Plan: Add a new test which failed with out the commit but now pass.

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: maro, yhchiang, kradhakrishnan, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D55287
2016-03-14 10:04:09 -07:00
Yi Wu
f71fc77b7c Cache to have an option to fail Cache::Insert() when full
Summary:
Cache to have an option to fail Cache::Insert() when full. Update call sites to check status and handle error.

I totally have no idea what's correct behavior of all the call sites when they encounter error. Please let me know if you see something wrong or more unit test is needed.

Test Plan: make check -j32, see tests pass.

Reviewers: anthony, yhchiang, andrewkr, IslamAbdelRahman, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D54705
2016-03-10 17:35:19 -08:00
sdong
e79ad9e184 Add Iterator Property rocksdb.iterator.version_number
Summary: We want to provide a way to detect whether an iterator is stale and needs to be recreated. Add a iterator property to return version number.

Test Plan: Add two unit tests for it.

Reviewers: IslamAbdelRahman, yhchiang, anthony, kradhakrishnan, andrewkr

Reviewed By: andrewkr

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D54921
2016-03-02 16:23:59 -08:00
sdong
74b660702e Rename iterator property "rocksdb.iterator.is.key.pinned" => "rocksdb.iterator.is-key-pinned"
Summary: Rename iterator property to folow property naming convention.

Test Plan: Run all existing tests.

Reviewers: andrewkr, anthony, yhchiang, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D54957
2016-03-01 13:47:12 -08:00
sdong
1f5954147b Introduce Iterator::GetProperty() and replace Iterator::IsKeyPinned()
Summary:
Add Iterator::GetProperty(), a way for users to communicate with iterator, and turn Iterator::IsKeyPinned() with it.
As a follow-up, I'll ask a property as the version number attached to the iterator

Test Plan: Rerun existing tests and add a negative test case.

Reviewers: yhchiang, andrewkr, kradhakrishnan, anthony, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D54783
2016-02-29 14:01:31 -08:00
Yueh-Hsuan Chiang
291ae4c206 Revert "Revert "Fixed the bug when both whole_key_filtering and prefix_extractor are set.""
Summary:
This reverts commit 73c31377bb, which mistakenly
reverts 73c31377bb that fixes a bug when both
whole_key_filtering and prefix_extractor are set

Test Plan: revert the patch

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52707
2016-02-22 16:33:26 -08:00
Baraa Hamodi
21e95811d1 Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
Yueh-Hsuan Chiang
4a8cbf4e31 Allows Get and MultiGet to read directly from SST files.
Summary:
Add kSstFileTier to ReadTier, which allows Get and MultiGet to
read only directly from SST files and skip mem-tables.

    kSstFileTier = 0x2      // data in SST files.
                          // Note that this ReadTier currently only supports
                          // Get and MultiGet and does not support iterators.

Test Plan: add new test in db_test.

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: igor, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D53511
2016-02-09 11:20:22 -08:00
Islam AbdelRahman
8e6172bc57 Add BlockBasedTableOptions::index_block_restart_interval
Summary: Add a new option to BlockBasedTableOptions that will allow us to change the restart interval for the index block

Test Plan: unit tests

Reviewers: yhchiang, anthony, andrewkr, sdong

Reviewed By: sdong

Subscribers: march, dhruba

Differential Revision: https://reviews.facebook.net/D53721
2016-02-05 10:22:37 -08:00
Islam AbdelRahman
0c433cd1eb Fix issue in Iterator::Seek when using Block based filter block with prefix_extractor
Summary: Similar to D53385 we need to check InDomain before checking the filter block.

Test Plan: unit tests

Reviewers: yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53421
2016-01-26 14:47:42 -08:00
Islam AbdelRahman
b0afcdeeac Fix bug in block based tables with full filter block and prefix_extractor
Summary:
Right now when we are creating a BlockBasedTable with fill filter block
we add to the filter all the prefixes that are InDomain() based on the prefix_extractor

the problem is that when we read a key from the file, we check the filter block for the prefix whether or not it's InDomain()

Test Plan: unit tests

Reviewers: yhchiang, rven, anthony, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53385
2016-01-26 11:07:08 -08:00
Islam AbdelRahman
2fbc59a348 Disallow SstFileWriter from creating empty sst files
Summary:
SstFileWriter may create an sst file with no entries
Right now this will fail when being ingested using DB::AddFile() saying that the keys are corrupted

Test Plan: make check

Reviewers: yhchiang, rven, anthony, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52815
2016-01-25 13:47:07 -08:00
Islam AbdelRahman
d9bca1e14c Reduce iterator deletion overhead
Summary:
After introducing Iterator::PinData(), we have extra overhead of deleting the pinned iterators that we track in a std::set
This patch avoid inserting to the std::set if we have only one iterator (normal use case when no iterators are pinned)

Before this change
```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="newiterator" --db="/tmp/rocksdbtest-8616/dbbench" --use_existing_db --disable_auto_compactions
newiterator  :       1.006 micros/op 994013 ops/sec;
newiterator  :       0.994 micros/op 1006295 ops/sec;
newiterator  :       0.990 micros/op 1010422 ops/sec;
```

After change

```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="newiterator" --db="/tmp/rocksdbtest-8616/dbbench" --use_existing_db --disable_auto_compactions
newiterator  :       0.754 micros/op 1326588 ops/sec;
newiterator  :       0.759 micros/op 1317394 ops/sec;
newiterator  :       0.691 micros/op 1446704 ops/sec;
```

Test Plan: make check -j64

Reviewers: yhchiang, rven, anthony, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52761
2016-01-11 16:48:15 -08:00
sdong
df7e3b6229 Include <array> in table/plain_table_key_coding.h
Summary: <array> is not included in table/plain_table_key_coding.h. It may be the cause of one CLANG build failure.

Test Plan: Build it

Reviewers: yhchiang, rven, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52725
2016-01-08 17:34:53 -08:00
sdong
9a8e3f73ed plain table reader: non-mmap mode to keep two recent buffers
Summary: In plain table reader's non-mmap mode, we only keep the most recent read buffer. However, for binary search, it is likely we come back to a location to read. To avoid one pread in such a case, we keep two read buffers. It should cover most of the cases.

Test Plan:
1. run tests
2. check the optimization works through strace when running
./table_reader_bench -mmap_read=false --num_keys2=1 -num_keys1=5000 -table_factory=plain_table --iterator --through_db

Reviewers: anthony, rven, kradhakrishnan, igor, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D51171
2016-01-08 10:53:57 -08:00
Islam AbdelRahman
f3fb39814d Fix BlockBasedTableTest.NoopTransformSeek failure
Summary:
table_test is failing because we are creating a temp InternalComparator

14:27:28 [ RUN      ] BlockBasedTableTest.NoopTransformSeek
14:27:28 pure virtual method called
14:27:28 terminate called without an active exception
14:27:28 /bin/sh: line 7: 2346261 Aborted                 (core dumped) ./$t

Test Plan: make table_test -j64 && ./table_test --gtest_filter="BlockBasedTableTest.NoopTransformSeek"

Reviewers: igor, sdong, anthony, rven

Reviewed By: rven

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52671
2016-01-07 09:48:29 -08:00
Yueh-Hsuan Chiang
73c31377bb Revert "Fixed the bug when both whole_key_filtering and prefix_extractor are set."
Summary:
This patch reverts commit 57605d7ef3 as it will
cause BlockBasedTableTest.NoopTransformSeek test crashes in some environment.

Test Plan: revert the patch

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52623
2016-01-06 23:33:41 -08:00
Yueh-Hsuan Chiang
57605d7ef3 Fixed the bug when both whole_key_filtering and prefix_extractor are set.
Summary:
When both whole_key_filtering and prefix_extractor are set, RocksDB will
mistakenly encode prefix + whole key into the database instead of
simply whole key when BlockBasedTable is used.  This patch fixes this bug.

Test Plan: Add a test in table_test

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52233
2016-01-06 23:01:23 -08:00
Igor Canadi
ba83447363 Merge pull request #923 from petermattis/pmattis/prefix-may-match
Fix index seeking in BlockTableReader::PrefixMayMatch.
2016-01-06 14:02:10 -08:00
Reid Horuff
da032495d3 Optimize GetLatestSequenceForKey
Summary: DBImpl::GetLatestSequenceForKey() can do memcpy's to load a value that will never be used.  This can be optimized by changing all the Get() functions called to optionally not fetch the value (and only fetch the sequencenumber).

Test Plan: optimistic_transaction_test and transaction_test

Reviewers: anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba, hermanlee4

Differential Revision: https://reviews.facebook.net/D52227
2016-01-06 13:43:22 -08:00
Peter Mattis
260c29762a Fix index seeking in BlockTableReader::PrefixMayMatch.
PrefixMayMatch previously seeked in the prefix index using an internal
key with a sequence number of 0. This would cause the prefix index seek
to fall off the end if the last key in the index had a user-key greater
than or equal to the key being looked for. Falling off the end of the
index in turn results in PrefixMayMatch returning false if the index is
in memory.
2016-01-06 16:39:56 -05:00
Jay Edgar
7699439b7c Prevent the user from setting block_restart_interval to less than 1
Summary: If block_restart_interval gets set to less than 1 an assert will be triggered in BlockBuilder::BlockBuilder().  This prevents the user from doing this by silently setting any value less than 1 to 1.

Test Plan: Added a test (in BlockBasedTableTest in table_test) that checks invalid values to make sure that they are reset to the expected values.  The block_restart_interval value is checked along with block_size_deviation which also silently sets the value if it is outside a specific range.

Reviewers: yoshinorim, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52509
2016-01-04 14:13:18 -08:00
Nathan Bronson
ac16663bd6 use -Werror=missing-field-initializers, to closer match MyRocks build
Summary:
myrocks seems to build rocksdb using
-Wmissing-field-initializers (and treats warnings as errors).  This diff
adds that flag to the rocksdb build, and fixes the compilation failures
that result.  I have not checked for any other differences in the build
flags for rocksdb build as part of myrocks.

Test Plan: make check

Reviewers: sdong, rven

Reviewed By: rven

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52443
2015-12-30 14:56:18 -08:00
Nathan Bronson
7d87f02799 support for concurrent adds to memtable
Summary:
This diff adds support for concurrent adds to the skiplist memtable
implementations.  Memory allocation is made thread-safe by the addition of
a spinlock, with small per-core buffers to avoid contention.  Concurrent
memtable writes are made via an additional method and don't impose a
performance overhead on the non-concurrent case, so parallelism can be
selected on a per-batch basis.

Write thread synchronization is an increasing bottleneck for higher levels
of concurrency, so this diff adds --enable_write_thread_adaptive_yield
(default off).  This feature causes threads joining a write batch
group to spin for a short time (default 100 usec) using sched_yield,
rather than going to sleep on a mutex.  If the timing of the yield calls
indicates that another thread has actually run during the yield then
spinning is avoided.  This option improves performance for concurrent
situations even without parallel adds, although it has the potential to
increase CPU usage (and the heuristic adaptation is not yet mature).

Parallel writes are not currently compatible with
inplace updates, update callbacks, or delete filtering.
Enable it with --allow_concurrent_memtable_write (and
--enable_write_thread_adaptive_yield).  Parallel memtable writes
are performance neutral when there is no actual parallelism, and in
my experiments (SSD server-class Linux and varying contention and key
sizes for fillrandom) they are always a performance win when there is
more than one thread.

Statistics are updated earlier in the write path, dropping the number
of DB mutex acquisitions from 2 to 1 for almost all cases.

This diff was motivated and inspired by Yahoo's cLSM work.  It is more
conservative than cLSM: RocksDB's write batch group leader role is
preserved (along with all of the existing flush and write throttling
logic) and concurrent writers are blocked until all memtable insertions
have completed and the sequence number has been advanced, to preserve
linearizability.

My test config is "db_bench -benchmarks=fillrandom -threads=$T
-batch_size=1 -memtablerep=skip_list -value_size=100 --num=1000000/$T
-level0_slowdown_writes_trigger=9999 -level0_stop_writes_trigger=9999
-disable_auto_compactions --max_write_buffer_number=8
-max_background_flushes=8 --disable_wal --write_buffer_size=160000000
--block_size=16384 --allow_concurrent_memtable_write" on a two-socket
Xeon E5-2660 @ 2.2Ghz with lots of memory and an SSD hard drive.  With 1
thread I get ~440Kops/sec.  Peak performance for 1 socket (numactl
-N1) is slightly more than 1Mops/sec, at 16 threads.  Peak performance
across both sockets happens at 30 threads, and is ~900Kops/sec, although
with fewer threads there is less performance loss when the system has
background work.

Test Plan:
1. concurrent stress tests for InlineSkipList and DynamicBloom
2. make clean; make check
3. make clean; DISABLE_JEMALLOC=1 make valgrind_check; valgrind db_bench
4. make clean; COMPILE_WITH_TSAN=1 make all check; db_bench
5. make clean; COMPILE_WITH_ASAN=1 make all check; db_bench
6. make clean; OPT=-DROCKSDB_LITE make check
7. verify no perf regressions when disabled

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: MarkCallaghan, IslamAbdelRahman, anthony, yhchiang, rven, sdong, guyg8, kradhakrishnan, dhruba

Differential Revision: https://reviews.facebook.net/D50589
2015-12-25 11:03:40 -08:00
Siying Dong
298ba27ae2 Merge pull request #846 from yuslepukhin/enble_c4244_lossofdata
Enable MS compiler warning c4244.
2015-12-23 22:59:42 -08:00
Andrew Kryczka
e089db40f9 Skip bottom-level filter block caching when hit-optimized
Summary:
When Get() or NewIterator() trigger file loads, skip caching the filter block if
(1) optimize_filters_for_hits is set and (2) the file is on the bottommost
level. Also skip checking filters under the same conditions, which means that
for a preloaded file or a file that was trivially-moved to the bottom level, its
filter block will eventually expire from the cache.

- added parameters/instance variables in various places in order to propagate the config ("skip_filters") from version_set to block_based_table_reader
- in BlockBasedTable::Rep, this optimization prevents filter from being loaded when the file is opened simply by setting filter_policy = nullptr
- in BlockBasedTable::Get/BlockBasedTable::NewIterator, this optimization prevents filter from being used (even if it was loaded already) by setting filter = nullptr

Test Plan:
updated unit test:

  $ ./db_test --gtest_filter=DBTest.OptimizeFiltersForHits

will also run 'make check'

Reviewers: sdong, igor, paultuckfield, anthony, rven, kradhakrishnan, IslamAbdelRahman, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D51633
2015-12-23 10:15:07 -08:00
Reid Horuff
97ea8afaaf compaction assertion triggering test fix for sequence zeroing assertion trip 2015-12-18 16:08:31 -08:00
Islam AbdelRahman
521da3abb3 Fix BlockBasedTableTest.BlockCacheLeak valgrind failure
Summary:
I added this line in my previous patch D48999 (which is incorrect)
We should not release the iterator since releasing it will evict the blocks from cache

Test Plan:
Run the test under valgrind
make check

Reviewers: rven, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52161
2015-12-18 11:17:21 -08:00
Islam AbdelRahman
aececc209e Introduce ReadOptions::pin_data (support zero copy for keys)
Summary:
This patch update the Iterator API to introduce new functions that allow users to keep the Slices returned by key() valid as long as the Iterator is not deleted

ReadOptions::pin_data : If true keep loaded blocks in memory as long as the iterator is not deleted
Iterator::IsKeyPinned() : If true, this mean that the Slice returned by key() is valid as long as the iterator is not deleted

Also add a new option BlockBasedTableOptions::use_delta_encoding to allow users to disable delta_encoding if needed.

Benchmark results (using https://phabricator.fb.com/P20083553)

```
// $ du -h /home/tec/local/normal.4K.Snappy/db10077
// 6.1G    /home/tec/local/normal.4K.Snappy/db10077

// $ du -h /home/tec/local/zero.8K.LZ4/db10077
// 6.4G    /home/tec/local/zero.8K.LZ4/db10077

// Benchmarks for shard db10077
// _build/opt/rocks/benchmark/rocks_copy_benchmark \
//      --normal_db_path="/home/tec/local/normal.4K.Snappy/db10077" \
//      --zero_db_path="/home/tec/local/zero.8K.LZ4/db10077"

// First run
// ============================================================================
// rocks/benchmark/RocksCopyBenchmark.cpp          relative  time/iter  iters/s
// ============================================================================
// BM_StringCopy                                                 1.73s  576.97m
// BM_StringPiece                                   103.74%      1.67s  598.55m
// ============================================================================
// Match rate : 1000000 / 1000000

// Second run
// ============================================================================
// rocks/benchmark/RocksCopyBenchmark.cpp          relative  time/iter  iters/s
// ============================================================================
// BM_StringCopy                                              611.99ms     1.63
// BM_StringPiece                                   203.76%   300.35ms     3.33
// ============================================================================
// Match rate : 1000000 / 1000000
```

Test Plan: Unit tests

Reviewers: sdong, igor, anthony, yhchiang, rven

Reviewed By: rven

Subscribers: dhruba, lovro, adsharma

Differential Revision: https://reviews.facebook.net/D48999
2015-12-16 12:08:30 -08:00
Dmitri Smirnov
236fe21c92 Enable MS compiler warning c4244.
Mostly due to the fact that there are differences in sizes of int,long
  on 64 bit systems vs GNU.
2015-12-11 16:47:34 -08:00
agiardullo
3bfd3d39a3 Use SST files for Transaction conflict detection
Summary:
Currently, transactions can fail even if there is no actual write conflict.  This is due to relying on only the memtables to check for write-conflicts.  Users have to tune memtable settings to try to avoid this, but it's hard to figure out exactly how to tune these settings.

With this diff, TransactionDB will use both memtables and SST files to determine if there are any write conflicts.  This relies on the fact that BlockBasedTable stores sequence numbers for all writes that happen after any open snapshot.  Also, D50295 is needed to prevent SingleDelete from disappearing writes (the TODOs in this test code will be fixed once the other diff is approved and merged).

Note that Optimistic transactions will still rely on tuning memtable settings as we do not want to read from SST while on the write thread.  Also, memtable settings can still be used to reduce how often TransactionDB needs to read SST files.

Test Plan: unit tests, db bench

Reviewers: rven, yhchiang, kradhakrishnan, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb, yoshinorim

Differential Revision: https://reviews.facebook.net/D50475
2015-12-11 12:34:11 -08:00
sdong
9d0b8f19d9 plain table reader: avoid re-read the same position for index and data in non-mmap mode
Summary: In non-mmap mode, plain table reader can issue two pread() for index checking and reading the actual data, although it's for the same location. By reusing the key decoder, we reuse the buffer used for the two to avoid it.

Test Plan: Run unit tests. Run table_reader_bench and see from strace the repeat read cases to disappear.

Reviewers: anthony, yhchiang, rven, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D50949
2015-11-18 16:49:08 -08:00
sdong
6170fec251 Fix build broken by previous commit of "option helper refactor"
Summary:
The commit of option helper refactor broken the build:
(1) a git merge problem
(2) some uncaught compiler warning
Fix it.

Test Plan: Make sure "make all" passes

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D50943
2015-11-17 16:52:54 -08:00
Siying Dong
3a6643c2fd Merge pull request #805 from SherlockNoMad/OptionHelperFix
Option Helper Refactoring
2015-11-17 16:24:52 -08:00
Islam AbdelRahman
a163cc2d5a Lint everything
Summary:
```
arc2 lint --everything
```

run the linter on the whole code repo to fix exisitng lint issues

Test Plan: make check -j64

Reviewers: sdong, rven, anthony, kradhakrishnan, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D50769
2015-11-16 12:56:21 -08:00
Yueh-Hsuan Chiang
e11f676e34 Add OptionsUtil::LoadOptionsFromFile() API
Summary:
This patch adds OptionsUtil::LoadOptionsFromFile() and
OptionsUtil::LoadLatestOptionsFromDB(), which allow developers
to construct DBOptions and ColumnFamilyOptions from a RocksDB
options file.  Note that most pointer-typed options such as
merge_operator will not be constructed.

With this API, developers no longer need to remember all the
options in order to reopen an existing rocksdb instance like
the following:

  DBOptions db_options;
  std::vector<std::string> cf_names;
  std::vector<ColumnFamilyOptions> cf_opts;

  // Load primitive-typed options from an existing DB
  OptionsUtil::LoadLatestOptionsFromDB(
      dbname, &db_options, &cf_names, &cf_opts);

  // Initialize necessary pointer-typed options
  cf_opts[0].merge_operator.reset(new MyMergeOperator());
  ...

  // Construct the vector of ColumnFamilyDescriptor
  std::vector<ColumnFamilyDescriptor> cf_descs;
  for (size_t i = 0; i < cf_opts.size(); ++i) {
    cf_descs.emplace_back(cf_names[i], cf_opts[i]);
  }

  // Open the DB
  DB* db = nullptr;
  std::vector<ColumnFamilyHandle*> cf_handles;
  auto s = DB::Open(db_options, dbname, cf_descs,
                    &handles, &db);

Test Plan:
Augment existing tests in column_family_test
options_test
db_test

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D49095
2015-11-12 06:52:43 -08:00
Islam AbdelRahman
838676c17b Revert "Adding new table properties"
Summary:
Reverting https://reviews.facebook.net/D34269 for now
after I landed it a flaky test started continuously failing, I am almost sure this patch is not related to the test but I will revert it until I figure out why it's failing

Test Plan: make check

Reviewers: kradhakrishnan

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D50385
2015-11-06 16:49:38 -08:00
Islam AbdelRahman
5b9ce1a323 Merge pull request #820 from yuslepukhin/enable_compiler_warnings
Enable Windows warnings C4307 C4309 C4512 C4701
2015-11-06 12:08:25 -08:00
Dmitri Smirnov
20f57b1715 Enable Windows warnings C4307 C4309 C4512 C4701
Enable C4307 'operator' : integral constant overflow
  Longs and ints on Windows are 32-bit hence the overflow
  Enable C4309 'conversion' : truncation of constant value
  Enable C4512 'class' : assignment operator could not be generated
  Enable C4701 Potentially uninitialized local variable 'name' used
2015-11-06 11:34:06 -08:00
Islam AbdelRahman
8be568a9c2 Adding new table properties
Summary:
This diff introduce new table properties that will be written for block based tables
These properties are
  - comparator name
  - merge operator name
  - property collectors names

Test Plan:
  - Added a new unit test to verify that these tests are written/read correctly
  - Running all other tests right now (wont land until all tests finish)

Reviewers: rven, kradhakrishnan, igor, sdong, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D34269
2015-11-06 11:19:01 -08:00
Islam AbdelRahman
f31442fb5c Merge pull request #803 from SherlockNoMad/SkipFlush
Add Option to Skip Flushing in TableBuilder
2015-11-02 14:56:11 -08:00
SherlockNoMad
df7ed91ef9 Fix white space at end of line 2015-11-02 14:12:29 -08:00
SherlockNoMad
ccc8c10c0c Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
SherlockNoMad
84992d6475 Option Helper Refactoring 2015-10-30 15:58:46 -07:00
SherlockNoMad
550af4ee68 Fix Travis Build Error 2015-10-29 22:41:57 -07:00
SherlockNoMad
a6dd0831d5 Add Option to Skip Flushing in TableBuilder 2015-10-29 22:10:25 -07:00
SherlockNoMad
b69b9b624e Support PlainTableOption in option_helper 2015-10-28 23:01:33 -07:00
Dmitri Smirnov
5c8f2ee786 Fix MockTable ID storage
On Windows two tests fail that use MockTable:
  flush_job_test and compaction_job_test with the following message:
  compaction_job_test_je.exe : Assertion failed: result.size() == 4,
  file c:\dev\rocksdb\rocksdb\table\mock_table.cc, line 110

  Investigation reveals that this failure occurs when a 4 byte
  ID written to a beginning of the physically open file (main
  contents remains in a in-memory map) can not be read back.

  The reason for the failure is that the ID is written directly
  to a WritableFile bypassing WritableFileWriter. The side effect of that
  is that pending_sync_ never becomes true so the file is never flushed,
  however, the direct cause of the failure is that the filesize_ member
  of the WritableFileWriter remains zero. At Close() the file is truncated
  to that size and the file becomes empty so the ID can not be read back.
2015-10-28 10:53:14 -07:00
Venkatesh Radhakrishnan
a98fbacfa0 Moving memtable related files from util to a new directory memtable
Summary:
We are cleaning up dependencies.
This diff takes a first step at moving memtable files to their own
directory called memtable. In future diffs, we will move other memtable
files from db to memtable.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48915
2015-10-16 14:10:33 -07:00
sdong
35ad531be3 Seperate InternalIterator from Iterator
Summary:
Separate a new class InternalIterator from class Iterator, when the look-up is done internally, which also means they operate on key with sequence ID and type.

This change will enable potential future optimizations but for now InternalIterator's functions are still the same as Iterator's.
At the same time, separate the cleanup function to a separate class and let both of InternalIterator and Iterator inherit from it.

Test Plan: Run all existing tests.

Reviewers: igor, yhchiang, anthony, kradhakrishnan, IslamAbdelRahman, rven

Reviewed By: rven

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48549
2015-10-13 15:32:13 -07:00
Islam AbdelRahman
1fe78a4073 Fix tests failing in ROCKSDB_LITE
Summary:
Fix tests that compile under ROCKSDB_LITE but currently failing.

table_test:
RandomizedLongDB test is using internal stats which is not supported in ROCKSDB_LITE

compaction_job_test:
Using CompactionJobStats which is not supported

perf_context_test:
KeyComparisonCount test try to open DB in ReadOnly mode which is not supported

Test Plan: run the tests under ROCKSDB_LITE

Reviewers: yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48585
2015-10-13 10:32:05 -07:00
Alexey Maykov
3d07b815f6 Passing table properties to compaction callback
Summary: It would be nice to have and access to table properties in compaction callbacks. In MyRocks project, it will make possible to update optimizer statistics online.

Test Plan: ran the unit test. Ran myrocks with the new way of collecting stats.

Reviewers: igor, rven, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48267
2015-10-09 18:10:55 -07:00
sdong
776bd8d5eb Pass column family ID to table property collector
Summary: Pass column family ID through TablePropertiesCollectorFactory::CreateTablePropertiesCollector() so that users can identify which column family this file is for and handle it differently.

Test Plan: Add unit test scenarios in tests related to table properties collectors to verify the information passed in is correct.

Reviewers: rven, yhchiang, anthony, kradhakrishnan, igor, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48411
2015-10-09 14:36:51 -07:00
Islam AbdelRahman
51fa7ecec5 Bytes read/written from cache statistics
Summary: Add 2 new counters BLOCK_CACHE_BYTES_WRITE, BLOCK_CACHE_BYTES_READ to keep track of how many bytes were written to the cache and how many bytes that we read from cache

Test Plan: make check

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48195
2015-10-07 15:17:20 -07:00
dyniusz
a065cdb388 bloom hit/miss stats for SST and memtable
Summary:
	hit and miss bloom filter stats for memtable and SST
	stats added to perf_context struct
	key matches and prefix matches combined into one stat

Test Plan: unit test veryfing the functionality added, see BloomStatsTest in db_test.cc for details

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47859
2015-10-07 11:23:20 -07:00
Igor Canadi
d80ce7f99a Compaction filter on merge operands
Summary:
Since Andres' internship is over, I took over https://reviews.facebook.net/D42555 and rebased and simplified it a bit.

The behavior in this diff is a bit simpler than in D42555:
* only merge operators are passed through FilterMergeValue(). If fitler function returns true, the merge operator is ignored
* compaction filter is *not* called on: 1) results of merge operations and 2) base values that are getting merged with merge operands (the second case was also true in previous diff)

Do we also need a compaction filter to get called on merge results?

Test Plan: make && make check

Reviewers: lovro, tnovak, rven, yhchiang, sdong

Reviewed By: sdong

Subscribers: noetzli, kolmike, leveldb, dhruba, sdong

Differential Revision: https://reviews.facebook.net/D47847
2015-10-07 09:30:03 -07:00
sdong
a70d08ec07 Fix the bug of using freed memory introduced by recent plain table reader patch
Summary: Recent patch introduced a bug that if non-mmap mode is used, in prefix encoding case, there is a resizing of cur_key_ within the same prefix, we still read prefix from the released buffer. It fails ASAN tests and this commit fixes it.

Test Plan: Run the ASAN tests for the failing test case.

Reviewers: IslamAbdelRahman, yhchiang, anthony, igor, kradhakrishnan, rven

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D47457
2015-09-23 16:16:26 -07:00
Islam AbdelRahman
f03b5c987b Add experimental DB::AddFile() to plug sst files into empty DB
Summary:
This is an initial version of bulk load feature

This diff allow us to create sst files, and then bulk load them later, right now the restrictions for loading an sst file are
(1) Memtables are empty
(2) Added sst files have sequence number = 0, and existing values in database have sequence number = 0
(3) Added sst files values are not overlapping

Test Plan: unit testing

Reviewers: igor, ott, sdong

Reviewed By: sdong

Subscribers: leveldb, ott, dhruba

Differential Revision: https://reviews.facebook.net/D39081
2015-09-23 12:42:43 -07:00
sdong
df34aea331 PlainTableReader to support non-mmap mode
Summary:
PlainTableReader now only allows mmap-mode. Add the support to non-mmap mode for more flexibility.
Refactor the codes to move all logic of reading data to PlainTableKeyDecoder, and consolidate the calls to Read() call and ReadVarint32() call. Implement the calls for both of mmap and non-mmap case seperately. For non-mmap mode, make copy of keys in several places when we need to move the buffer after reading the keys.

Test Plan: Add the mode of non-mmap case in plain_table_db_test. Run it in valgrind mode too.

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D47187
2015-09-23 11:41:07 -07:00
sdong
d746eaad5e RandomAccessFileReader should not inherit RandomAccessFile
Summary: RandomAccessFileReader unnecessarily inherited RandomAccessFile, which can introduce unnecessarily extra costs. Remove it.

Test Plan: Run all existing tests

Reviewers: yhchiang, anthony, igor, kradhakrishnan, rven, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D47409
2015-09-23 11:00:41 -07:00
Andres Noetzli
014fd55adc Support for SingleDelete()
Summary:
This patch fixes #7460559. It introduces SingleDelete as a new database
operation. This operation can be used to delete keys that were never
overwritten (no put following another put of the same key). If an overwritten
key is single deleted the behavior is undefined. Single deletion of a
non-existent key has no effect but multiple consecutive single deletions are
not allowed (see limitations).

In contrast to the conventional Delete() operation, the deletion entry is
removed along with the value when the two are lined up in a compaction. Note:
The semantics are similar to @igor's prototype that allowed to have this
behavior on the granularity of a column family (
https://reviews.facebook.net/D42093 ). This new patch, however, is more
aggressive when it comes to removing tombstones: It removes the SingleDelete
together with the value whenever there is no snapshot between them while the
older patch only did this when the sequence number of the deletion was older
than the earliest snapshot.

Most of the complex additions are in the Compaction Iterator, all other changes
should be relatively straightforward. The patch also includes basic support for
single deletions in db_stress and db_bench.

Limitations:
- Not compatible with cuckoo hash tables
- Single deletions cannot be used in combination with merges and normal
  deletions on the same key (other keys are not affected by this)
- Consecutive single deletions are currently not allowed (and older version of
  this patch supported this so it could be resurrected if needed)

Test Plan: make all check

Reviewers: yhchiang, sdong, rven, anthony, yoshinorim, igor

Reviewed By: igor

Subscribers: maykov, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43179
2015-09-17 11:42:56 -07:00
Igor Canadi
81a61d75dc Skipped tests shouldn't be failures [part 2]
Summary: Missed one file in the previous commit

Test Plan: compiles

Reviewers: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47055
2015-09-15 22:59:53 -07:00
Islam AbdelRahman
45e9e4f0bb Refactor NewTableReader to accept TableReaderOptions
Summary:
Refactoring NewTableReader to accept TableReaderOptions
This will make it easier to add new options in the future, for example in this diff https://reviews.facebook.net/D46071

Test Plan: run existing tests

Reviewers: igor, yhchiang, anthony, rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46179
2015-09-11 11:36:33 -07:00
Andres Noetzli
6bdc484fd8 Added Equal method to Comparator interface
Summary:
In some cases, equality comparisons can be done more efficiently than three-way
comparisons. There are quite a few places in the code where we only care about
equality. This patch adds an Equal() method that defaults to using the
Compare() method.

Test Plan: make clean all check

Reviewers: rven, anthony, yhchiang, igor, sdong

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46233
2015-09-08 15:30:49 -07:00
Igor Canadi
14456aea52 Fix compile
Summary: There was a merge conflict with https://reviews.facebook.net/D45993

Test Plan: make check

Reviewers: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46065
2015-09-02 16:05:53 -07:00
Igor Canadi
76f286cc82 Optimize bloom filter cache misses
Summary:
This optimizes the case when (cache_index_and_filter_blocks=1) and bloom filter is not present in the cache.

Previously we did:
1. Read meta block from file
2. Read the filter position from the meta block
3. Read the filter

Now, we pre-load the filter position on Table::Open(), so we can skip steps (1) and (2) on bloom filter cache miss. Instead of 2 IOs, we do only 1.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46047
2015-09-02 15:36:47 -07:00
Andres Noetzli
3c9cef1eed Unified maps with Comparator for sorting, other cleanup
Summary:
This diff is a collection of cleanups that were initially part of D43179.
Additionally it adds a unified way of defining key-value maps that use a
Comparator for sorting (this was previously implemented in four different
places).

Test Plan: make clean check all

Reviewers: rven, anthony, yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45993
2015-09-02 13:58:22 -07:00
sdong
7a0dbdf3ac Add ZSTD (not final format) compression type
Summary: Add ZSTD compression type. The same way as adding LZ4.

Test Plan: run all tests. Generate files in db_bench. Make sure reads succeed. But the SST files cannot be opened in older versions. Also some other adhoc tests.

Reviewers: rven, anthony, IslamAbdelRahman, kradhakrishnan, igor

Reviewed By: igor

Subscribers: MarkCallaghan, maykov, yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45747
2015-08-28 11:01:13 -07:00
Yueh-Hsuan Chiang
6996de87af Expose per-level aggregated table properties via GetProperty()
Summary:
This patch adds "rocksdb.aggregated-table-properties"
and "rocksdb.aggregated-table-properties-at-levelN", the former
returns the aggreated table properties of a column family,
while the later returns the aggregated table properties
of the specified level N.

Test Plan: Added tests in db_test

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45087
2015-08-25 12:03:54 -07:00
sdong
c852968465 db_iter_test: add more test cases for the data race bug
Summary: Add more test cases of data race causing wrong iterating results. Tag tests not passing as DISABLED_

Test Plan: Run the tests

Reviewers: igor, rven, IslamAbdelRahman, anthony, kradhakrishnan, yhchiang

Reviewed By: yhchiang

Subscribers: tnovak, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D44907
2015-08-21 12:14:12 -07:00
sdong
4637207120 Add test case to repro the mispositional iterator in a low-chance data race case
Summary: Iterator has a bug: if a child iterator reaches its end, and user issues a Prev(), and just before SeekToLast() of the child iterator is called, some extra rows is added in the end, the position of iterator can be misplaced.

Test Plan: Run the tests with or without valgrind

Reviewers: rven, yhchiang, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: tnovak, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43671
2015-08-12 10:50:52 -07:00
Andres Notzli
68f934355a Better CompactionJob testing
Summary:
Changed compaction_job_test to support better/more thorough
tests and added two tests. Also changed MockFileContents
to order using InternalKeyComparator.

Test Plan: make compaction_job_test && ./compaction_job_test; make all && make check

Reviewers: sdong, rven, igor, yhchiang, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42837
2015-08-07 21:59:51 -07:00
Andres Notzli
c465071029 Removing duplicate code
Summary:
While working on https://reviews.facebook.net/D43179 , I found
duplicate code in the tests. This patch removes it.

Test Plan: make clean all check

Reviewers: igor, sdong, rven, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43263
2015-08-05 07:33:27 -07:00
agiardullo
064294081b Improved FileExists API
Summary: Add new CheckFileExists method.  Considered changing the FileExists api but didn't want to break anyone's builds.

Test Plan: unit tests

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42003
2015-07-20 17:20:40 -07:00
Islam AbdelRahman
4853e228ef Make table_test runnable in ROCKSDB_LITE
Summary: Remove plain table tests from table_test since plain table is not supported in ROCKSDB_LITE

Test Plan: table_test

Reviewers: igor, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42153
2015-07-20 11:09:14 -07:00
Islam AbdelRahman
cf6a7bebc8 Block cuckoo table tests in ROCKSDB_LITE
Summary: Cuckoo table is not supported in ROCKSDB_LITE, blocking it's tests

Test Plan:
cuckoo_table_builder_test
cuckoo_table_db_test
cuckoo_table_reader_test

Reviewers: sdong, igor, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42141
2015-07-20 10:50:46 -07:00
sdong
6e9fbeb27c Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env
Summary: We want to keep Env a think layer for better portability. Less platform dependent codes should be moved out of Env. In this patch, I create a wrapper of file readers and writers, and put rate limiting, write buffering, as well as most perf context instrumentation and random kill out of Env. It will make it easier to maintain multiple Env in the future.

Test Plan: Run all existing unit tests.

Reviewers: anthony, kradhakrishnan, IslamAbdelRahman, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42321
2015-07-17 16:58:18 -07:00
Andres Notzli
1d20fa9d0f Fixed and simplified merge_helper
Summary:
MergeUntil was not reporting a success when merging an operand with
a Value/Deletion despite the comments in MergeHelper and CompactionJob
indicating otherwise. This lead to operands being written to the compaction
output unnecessarily:

M1 M2 M3 P M4 M5 --> (P+M1+M2+M3) M2 M3 M4 M5 (before the diff)
M1 M2 M3 P M4 M5 --> (P+M1+M2+M3) M4 M5 (after the diff)

In addition, the code handling Values/Deletion was basically identical.
This patch unifies the code. Finally, this patch also adds testing for
merge_helper.

Test Plan: make && make check

Reviewers: sdong, rven, yhchiang, tnovak, igor

Reviewed By: igor

Subscribers: tnovak, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42351
2015-07-17 09:27:24 -07:00
Dmitri Smirnov
d1a457181d Ensure Windows build w/o port/port.h in public headers
- Remove make file defines from public headers and use _WIN32 because it is compiler defined
 - use __GNUC__ and __clang__ to guard non-portable attributes
 - add #include "port/port.h" to some new .cc files.
 - minor changes in CMakeLists to reflect recent changes
2015-07-16 12:10:16 -07:00
lovro
e1c99e10c1 Replace std::priority_queue in MergingIterator with custom heap, take 2
Summary: Repeat of b6655a679d (reverted in b7a2369fb2) with a proper fix for the issue that 57d216ea65 was trying to fix.

Test Plan:
make check

for i in $(seq 100); do ./db_stress --test_batches_snapshots=1 --threads=32 --write_buffer_size=4194304 --destroy_db_initially=0 --reopen=20 --readpercent=45 --prefixpercent=5 --writepercent=35 --delpercent=5 --iterpercent=10 --db=/tmp/rocksdb_crashtest_KdCI5F --max_key=100000000 --mmap_read=0 --block_size=16384 --cache_size=1048576 --open_files=500000 --verify_checksum=1 --sync=0 --progress_reports=0 --disable_wal=0 --disable_data_sync=1 --target_file_size_base=2097152 --target_file_size_multiplier=2 --max_write_buffer_number=3 --max_background_compactions=20 --max_bytes_for_level_base=10485760 --filter_deletes=0 --memtablerep=prefix_hash --prefix_size=7 --ops_per_thread=200 || break; done

Reviewers: anthony, sdong, igor, yhchiang

Reviewed By: igor, yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41391
2015-07-15 03:34:40 -07:00
sdong
f9728640f3 "make format" against last 10 commits
Summary: This helps Windows port to format their changes, as discussed. Might have formatted some other codes too becasue last 10 commits include more.

Test Plan: Build it.

Reviewers: anthony, IslamAbdelRahman, kradhakrishnan, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41961
2015-07-13 13:50:18 -07:00
sdong
76d3cd3286 Fix public API dependency on internal codes and dependency on MAX_INT32
Summary:
Public API depends on port/port.h which is wrong. Fix it.
Also with gcc 4.8.1 build was broken as MAX_INT32 was not recognized. Fix it by using ::max in linux.

Test Plan: Build it and try to build an external project on top of it.

Reviewers: anthony, yhchiang, kradhakrishnan, igor

Reviewed By: igor

Subscribers: yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41745
2015-07-11 10:32:11 -07:00
Siying Dong
e41cbd9c2f Merge pull request #646 from yuslepukhin/ms_win_port
Windows Port from Microsoft
2015-07-10 15:53:39 -07:00
sdong
041b6f95a2 perf_context: report time spent on reading index and bloom blocks
Summary: Add a perf context counter to help users figure out time spent on reading indexes and bloom filter blocks.

Test Plan: Will write a unit test

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41433
2015-07-10 14:45:42 -07:00
Dmitri Smirnov
c903ccc4c2 Merge from github/master 2015-07-09 18:01:08 -07:00
unknown
5c79132335 Revert the changes related to Options, as requested to seperate them into
a different patch.
2015-07-09 11:31:42 -07:00
Dmitri Smirnov
ef4b87f1b2 Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00
Yueh-Hsuan Chiang
b7a2369fb2 Revert "Replace std::priority_queue in MergingIterator with custom heap"
Summary:
This patch reverts "Replace std::priority_queue in MergingIterator
with custom heap" (commit commit b6655a679d)
as it causes db_stress failure.

Test Plan: ./db_stress --test_batches_snapshots=1 --threads=32 --write_buffer_size=4194304 --destroy_db_initially=0 --reopen=20 --readpercent=45 --prefixpercent=5 --writepercent=35 --delpercent=5 --iterpercent=10 --db=/tmp/rocksdb_crashtest_KdCI5F --max_key=100000000 --mmap_read=0 --block_size=16384 --cache_size=1048576 --open_files=500000 --verify_checksum=1 --sync=0 --progress_reports=0 --disable_wal=0 --disable_data_sync=1 --target_file_size_base=2097152 --target_file_size_multiplier=2 --max_write_buffer_number=3 --max_background_compactions=20 --max_bytes_for_level_base=10485760 --filter_deletes=0 --memtablerep=prefix_hash --prefix_size=7 --ops_per_thread=200 --kill_random_test=97

Reviewers: igor, anthony, lovro, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41343
2015-07-07 14:45:20 -07:00
Yueh-Hsuan Chiang
57d216ea65 Remove assert(current_ == CurrentReverse()) in MergingIterator::Prev()
Summary:
Remove assert(current_ == CurrentReverse()) in MergingIterator::Prev()
because it is possible to have some keys larger than the seek-key
inserted between Seek() and SeekToLast(), which makes current_ not
equal to CurrentReverse().

Test Plan: db_stress

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41331
2015-07-07 12:45:06 -07:00
Yueh-Hsuan Chiang
685582a0b4 Revert two diffs related to DBIter::FindPrevUserKey()
Summary:
This diff reverts the following two previous diffs related to
DBIter::FindPrevUserKey(), which makes db_stress unstable.
We should bake a better fix for this.

* "Fix a comparison in DBIter::FindPrevUserKey()"
  ec70fea4c4.

* "Fixed endless loop in DBIter::FindPrevUserKey()"
  acee2b08a2.

Test Plan: db_stress

Reviewers: anthony, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41301
2015-07-07 11:36:24 -07:00
lovro
b6655a679d Replace std::priority_queue in MergingIterator with custom heap
Summary:
While profiling compaction in our service I noticed a lot of CPU (~15% of compaction) being spent in MergingIterator and key comparison.  Looking at the code I found MergingIterator was (understandably) using std::priority_queue for the multiway merge.

Keys in our dataset include sequence numbers that increase with time.  Adjacent keys in an L0 file are very likely to be adjacent in the full database.  Consequently, compaction will often pick a chunk of rows from the same L0 file before switching to another one.  It would be great to avoid the O(log K) operation per row while compacting.

This diff replaces std::priority_queue with a custom binary heap implementation.  It has a "replace top" operation that is cheap when the new top is the same as the old one (i.e. the priority of the top entry is decreased but it still stays on top).

Test Plan:
make check

To test the effect on performance, I generated databases with data patterns that mimic what I describe in the summary (rows have a mostly increasing sequence number).  I see a 10-15% CPU decrease for compaction (and a matching throughput improvement on tmpfs).  The exact improvement depends on the number of L0 files and the amount of locality.  Performance on randomly distributed keys seems on par with the old code.

Reviewers: kailiu, sdong, igor

Reviewed By: igor

Subscribers: yoshinorim, dhruba, tnovak

Differential Revision: https://reviews.facebook.net/D29133
2015-07-06 04:24:09 -07:00
Yueh-Hsuan Chiang
acee2b08a2 Fixed endless loop in DBIter::FindPrevUserKey()
Summary: Fixed endless loop in DBIter::FindPrevUserKey()

Test Plan: ./db_stress --test_batches_snapshots=1 --threads=32 --write_buffer_size=4194304 --destroy_db_initially=0 --reopen=20 --readpercent=45 --prefixpercent=5 --writepercent=35 --delpercent=5 --iterpercent=10 --db=/tmp/rocksdb_crashtest_KdCI5F --max_key=100000000 --mmap_read=0 --block_size=16384 --cache_size=1048576 --open_files=500000 --verify_checksum=1 --sync=0 --progress_reports=0 --disable_wal=0 --disable_data_sync=1 --target_file_size_base=2097152 --target_file_size_multiplier=2 --max_write_buffer_number=3 --max_background_compactions=20 --max_bytes_for_level_base=10485760 --filter_deletes=0 --memtablerep=prefix_hash --prefix_size=7 --ops_per_thread=200 --kill_random_test=97

Reviewers: tnovak, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41085
2015-07-02 16:10:31 -07:00
Dmitri Smirnov
9dbde7277c Merge remote-tracking branch 'origin' into ms_win_port 2015-07-02 11:34:22 -07:00
Dmitri Smirnov
18285c1e2f Windows Port from Microsoft
Summary: Make RocksDb build and run on Windows to be functionally
 complete and performant. All existing test cases run with no
 regressions. Performance numbers are in the pull-request.

 Test plan: make all of the existing unit tests pass, obtain perf numbers.

 Co-authored-by: Praveen Rao praveensinghrao@outlook.com
 Co-authored-by: Sherlock Huang baihan.huang@gmail.com
 Co-authored-by: Alex Zinoviev alexander.zinoviev@me.com
 Co-authored-by: Dmitri Smirnov dmitrism@microsoft.com
2015-07-01 16:13:56 -07:00
sdong
05e2831966 Allocate LevelFileIteratorState and LevelFileNumIterator from DB iterator's arena
Summary: Try to allocate LevelFileIteratorState and LevelFileNumIterator from DB iterator's arena, instead of calling malloc and free.

Test Plan: valgrind check

Reviewers: rven, yhchiang, anthony, kradhakrishnan, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D40929
2015-06-30 17:30:38 -07:00
Igor Canadi
0a019d74a0 Use malloc_usable_size() for accounting block cache size
Summary:
Currently, when we insert something into block cache, we say that the block cache capacity decreased by the size of the block. However, size of the block might be less than the actual memory used by this object. For example, 4.5KB block will actually use 8KB of memory. So even if we configure block cache to 10GB, our actually memory usage of block cache will be 20GB!

This problem showed up a lot in testing and just recently also showed up in MongoRocks production where we were using 30GB more memory than expected.

This diff will fix the problem. Instead of counting the block size, we will count memory used by the block. That way, a block cache configured to be 10GB will actually use only 10GB of memory.

I'm using non-portable function and I couldn't find info on portability on Google. However, it seems to work on Linux, which will cover majority of our use-cases.

Test Plan:
1. fill up mongo instance with 80GB of data
2. restart mongo with block cache size configured to 10GB
3. do a table scan in mongo
4. memory usage before the diff: 12GB. memory usage after the diff: 10.5GB

Reviewers: sdong, MarkCallaghan, rven, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D40635
2015-06-26 11:48:09 -07:00
Giuseppe Ottaviano
782a1590f9 Implement a table-level row cache
Summary:
Implementation of a table-level row cache.
It only caches point queries done through the `DB::Get` interface, queries done through the `Iterator` interface will completely skip the cache.

Supports snapshots and merge operations.

Test Plan: Ran `make valgrind_check commit-prereq`

Reviewers: igor, philipp, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D39849
2015-06-23 10:25:45 -07:00
sdong
6df589b446 Add TablePropertiesCollector::NeedCompact() to suggest DB to further compact output files
Summary:
It is experimental. Allow users to return from a call back function TablePropertiesCollector::NeedCompact(), based on the data in the file.
It can be used to allow users to suggest DB to clear up delete tombstones faster.

Test Plan: Add a unit test.

Reviewers: igor, yhchiang, kradhakrishnan, rven

Reviewed By: rven

Subscribers: yoshinorim, MarkCallaghan, maykov, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D39585
2015-06-05 20:18:21 -07:00
agiardullo
dc9d70de65 Optimistic Transactions
Summary: Optimistic transactions supporting begin/commit/rollback semantics.  Currently relies on checking the memtable to determine if there are any collisions at commit time.  Not yet implemented would be a way of enuring the memtable has some minimum amount of history so that we won't fail to commit when the memtable is empty.  You should probably start with transaction.h to get an overview of what is currently supported.

Test Plan: Added a new test, but still need to look into stress testing.

Reviewers: yhchiang, igor, rven, sdong

Reviewed By: sdong

Subscribers: adamretter, MarkCallaghan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D33435
2015-05-29 14:36:35 -07:00
Igor Canadi
dbd95b7532 Add more table properties to EventLogger
Summary:
Example output:

    {"time_micros": 1431463794310521, "job": 353, "event": "table_file_creation", "file_number": 387, "file_size": 86937, "table_info": {"data_size": "81801", "index_size": "9751", "filter_size": "0", "raw_key_size": "23448", "raw_average_key_size": "24.000000", "raw_value_size": "990571", "raw_average_value_size": "1013.890481", "num_data_blocks": "245", "num_entries": "977", "filter_policy_name": "", "kDeletedKeys": "0"}}

Also fixed a bug where BuildTable() in recovery was passing Env::IOHigh argument into paranoid_checks_file parameter.

Test Plan: make check + check out the output in the log

Reviewers: sdong, rven, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D38343
2015-05-12 15:53:55 -07:00
clark.kang
6ede020dc4 fix typos 2015-04-25 18:14:27 +09:00
sdong
98a44559d5 Build for CYGWIN
Summary:
Make it build for CYGWIN.
Need to define "-std=gnu++11" instead of "-std=c++11" and use some replacement functions.

Test Plan: Build it and run some unit tests in CYGWIN

Reviewers: yhchiang, rven, anthony, kradhakrishnan, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D37605
2015-04-23 21:33:44 -07:00
sdong
fcb206b667 SyncPoint to allow a callback with an argument and use it to get DBTest.DynamicLevelCompressionPerLevel2 more straight-forward
Summary:
Allow users to give a callback function with parameter using sync point, so more complicated verification can be done in tests.
Use it in DBTest.DynamicLevelCompressionPerLevel2 so that failures will be more easy to debug.

Test Plan: Run all tests. Run DBTest.DynamicLevelCompressionPerLevel2 with valgrind check.

Reviewers: rven, yhchiang, anthony, kradhakrishnan, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D36999
2015-04-14 16:18:50 -07:00
Igor Canadi
5e067a7b19 Clean up compression logging
Summary: Now we add warnings when user configures compression and the compression is not supported.

Test Plan:
Configured compression to non-supported values. Observed messages in my log:

    2015/03/26-12:17:57.586341 7ffb8a496840 [WARN] Compression type chosen for level 2 is not supported: LZ4. RocksDB will not compress data on level 2.

    2015/03/26-12:19:10.768045 7f36f15c5840 [WARN] Compression type chosen is not supported: LZ4. RocksDB will not compress data.

Reviewers: rven, sdong, yhchiang

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D35979
2015-04-06 12:50:44 -07:00
sdong
a45e7581b7 Avoid naming conflict of EntryType
Summary:
Fix build break on travis build:

$ OPT=-DTRAVIS V=1 make unity && make clean && OPT=-DTRAVIS V=1 make db_test && ./db_test

......

In file included from unity.cc:65:0:
./table/plain_table_key_coding.cc: In member function ‘rocksdb::Status rocksdb::PlainTableKeyDecoder::NextPrefixEncodingKey(const char*, const char*, rocksdb::ParsedInternalKey*, rocksdb::Slice*, size_t*, bool*)’:
./table/plain_table_key_coding.cc:224:3: error: reference to ‘EntryType’ is ambiguous
   EntryType entry_type;
   ^
In file included from ./db/table_properties_collector.h:9:0,
                 from ./db/builder.h:11,
                 from ./db/builder.cc:10,
                 from unity.cc:1:
./include/rocksdb/table_properties.h:81:6: note: candidates are: enum rocksdb::EntryType
 enum EntryType {
      ^
In file included from unity.cc:65:0:
./table/plain_table_key_coding.cc:16:6: note:                 enum rocksdb::{anonymous}::EntryType
 enum EntryType : unsigned char {
      ^
./table/plain_table_key_coding.cc:231:51: error: ‘entry_type’ was not declared in this scope
     const char* pos = DecodeSize(key_ptr, limit, &entry_type, &size);
                                                   ^
make: *** [unity.o] Error 1

Test Plan:
OPT=-DTRAVIS V=1 make unity

And make sure it doesn't break anymore.

Reviewers: yhchiang, kradhakrishnan, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D36549
2015-04-06 11:49:13 -07:00
sdong
953a885ebf A new call back to TablePropertiesCollector to allow users know the entry is add, delete or merge
Summary:
Currently users have no idea a key is add, delete or merge from TablePropertiesCollector call back. Add a new function to add it.

Also refactor the codes so that
(1) make table property collector and internal table property collector two separate data structures with the later one now exposed
(2) table builders only receive internal table properties

Test Plan: Add cases in table_properties_collector_test to cover both of old and new ways of using TablePropertiesCollector.

Reviewers: yhchiang, igor.sugak, rven, igor

Reviewed By: rven, igor

Subscribers: meyering, yoshinorim, maykov, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D35373
2015-04-06 10:27:21 -07:00
Anurag Indu
1e57f2bf2b Fix build
Test Plan: Running make all

Reviewers: sdong

Reviewed By: sdong

Subscribers: rven, yhchiang, igor, meyering, dhruba

Differential Revision: https://reviews.facebook.net/D35889
2015-03-24 17:00:28 -07:00
Anurag Indu
211ca26aee Fixing build issue
Summary: Fixing issues with get context function.

Test Plan: Run make commit-prereq

Reviewers: sdong, meyering, yhchiang

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D35853
2015-03-24 16:27:24 -07:00
Anurag Indu
3d1a924ff3 Adding stats for the merge and filter operation
Summary:
We have addded new stats and perf_context for measuring the merge and filter operation time consumption.
We have bounded all the merge operations within the GUARD statment and collected the total time for these operations in the DB.

Test Plan: WIP

Reviewers: rven, yhchiang, kradhakrishnan, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D34377
2015-03-24 14:42:04 -07:00
Igor Sugak
9405b5ef8f rocksdb: Remove #include "util/string_util.h" from util/testharness.h
Summary:
1. Manually deleted #include "util/string_util.h" from util/testharness.h
2.
```
% USE_CLANG=1 make all -j55 -k 2> build.log
% perl -naF: -E 'say $F[0] if /: error:/' build.log | sort -u | xargs sed -i '/#include "util\/testharness.h"/i #include "util\/string_util.h"'
```

Test Plan:
Make sure make all completes with no errors.
```
% make all -j55
```

Reviewers: meyering, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D35493
2015-03-19 17:29:37 -07:00
Igor Sugak
b4b69e4f77 rocksdb: switch to gtest
Summary:
Our existing test notation is very similar to what is used in gtest. It makes it easy to adopt what is different.
In this diff I modify existing [[ https://code.google.com/p/googletest/wiki/Primer#Test_Fixtures:_Using_the_Same_Data_Configuration_for_Multiple_Te | test fixture ]] classes to inherit from `testing::Test`. Also for unit tests that use fixture class, `TEST` is replaced with `TEST_F` as required in gtest.

There are several custom `main` functions in our existing tests. To make this transition easier, I modify all `main` functions to fallow gtest notation. But eventually we can remove them and use implementation of `main` that gtest provides.

```lang=bash
% cat ~/transform
#!/bin/sh
files=$(git ls-files '*test\.cc')
for file in $files
do
  if grep -q "rocksdb::test::RunAllTests()" $file
  then
    if grep -Eq '^class \w+Test {' $file
    then
      perl -pi -e 's/^(class \w+Test) {/${1}: public testing::Test {/g' $file
      perl -pi -e 's/^(TEST)/${1}_F/g' $file
    fi
    perl -pi -e 's/(int main.*\{)/${1}::testing::InitGoogleTest(&argc, argv);/g' $file
    perl -pi -e 's/rocksdb::test::RunAllTests/RUN_ALL_TESTS/g' $file
  fi
done
% sh ~/transform
% make format
```

Second iteration of this diff contains only scripted changes.

Third iteration contains manual changes to fix last errors and make it compilable.

Test Plan:
Build and notice no errors.
```lang=bash
% USE_CLANG=1 make check -j55
```
Tests are still testing.

Reviewers: meyering, sdong, rven, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D35157
2015-03-17 14:08:00 -07:00
Igor Sugak
9fd6edf81c rocksdb: Replace ASSERT* with EXPECT* in functions that does not return void value
Summary:
gtest does not use exceptions to fail a unit test by design, and `ASSERT*`s are implemented using `return`. As a consequence we cannot use `ASSERT*` in a function that does not return `void` value ([[ https://code.google.com/p/googletest/wiki/AdvancedGuide#Assertion_Placement | 1]]), and have to fix our existing code. This diff does this in a generic way, with no manual changes.

In order to detect all existing `ASSERT*` that are used in functions that doesn't return void value, I change the code to generate compile errors for such cases.

In `util/testharness.h` I defined `EXPECT*` assertions, the same way as `ASSERT*`, and redefined `ASSERT*` to return `void`. Then executed:

```lang=bash
% USE_CLANG=1 make all -j55 -k 2> build.log
% perl -naF: -e 'print "-- -number=".$F[1]." ".$F[0]."\n" if  /: error:/' \
build.log | xargs -L 1 perl -spi -e 's/ASSERT/EXPECT/g if $. == $number'
% make format
```
After that I reverted back change to `ASSERT*` in `util/testharness.h`. But preserved introduced `EXPECT*`, which is the same as `ASSERT*`. This will be deleted once switched to gtest.

This diff is independent and contains manual changes only in `util/testharness.h`.

Test Plan:
Make sure all tests are passing.
```lang=bash
% USE_CLANG=1 make check
```

Reviewers: igor, lgalanis, sdong, yufei.zhu, rven, meyering

Reviewed By: meyering

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33333
2015-03-16 20:52:32 -07:00
Igor Sugak
95344346af rocksdb: Small refactoring before migrating to gtest
Summary: These changes are necessary to make tests look more generic, and avoid feature conflicts with gtest.

Test Plan:
Make sure no build errors, and all test are passing.
```
% make check
```

Reviewers: igor, meyering

Reviewed By: meyering

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D35145
2015-03-16 18:08:59 -07:00
sdong
e9de8b65a6 Change the way options.compression_per_level is used when options.level_compaction_dynamic_level_bytes=true
Summary:
Change the way options.compression_per_level is used when options.level_compaction_dynamic_level_bytes=true so that options.compression_per_level[1] determines compression for the level L0 is merged to, options.compression_per_level[2] to the level after that, etc.

Test Plan: run all tests

Reviewers: rven, yhchiang, kradhakrishnan, igor

Reviewed By: igor

Subscribers: yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D34431
2015-03-11 13:14:52 -07:00
krad
f29b33c73b Add functionality to pre-fetch blocks specified by a key range to BlockBasedTable implementation.
Summary:
Pre-fetching is a common operation performed by data stores for
disk/flash based systems as part of database startup.

This is part of task 5197184.

Test Plan: Run the newly added unit test

Reviewers: rven, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33933
2015-03-02 17:07:03 -08:00
Sameet Agarwal
e7c434c364 Add columnfamily option optimize_filters_for_hits to optimize for key hits only
Summary:
    Summary:
    Added a new option to ColumnFamllyOptions  - optimize_filters_for_hits. This option can be used in the case where most
    accesses to the store are key hits and we dont need to optimize performance for key misses.
    This is useful when you have a very large database and most of your lookups succeed.  The option allows the store to
     not store and use filters in the last level (the largest level which contains data). These filters can take a large amount of
     space for large databases (in memory and on-disk). For the last level, these filters are only useful for key misses and not
     for key hits. If we are not optimizing for key misses, we can choose to not store these filters for that level.

    This option is only provided for BlockBasedTable. We skip the filters when we are compacting

Test Plan:
1. Modified db_test toalso run tests with an additonal option (skip_filters_on_last_level)
 2. Added another unit test to db_test which specifically tests that filters are being skipped

Reviewers: rven, igor, sdong

Reviewed By: sdong

Subscribers: lgalanis, yoshinorim, MarkCallaghan, rven, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33717
2015-02-26 16:25:56 -08:00
Igor Sugak
62247ffa3b rocksdb: Add missing override
Summary:
When using latest clang (3.6 or 3.7/trunck) rocksdb is failing with many errors. Almost all of them are missing override errors. This diff adds missing override keyword. No manual changes.

Prerequisites: bear and clang 3.5 build with extra tools

```lang=bash
% USE_CLANG=1 bear make all # generate a compilation database http://clang.llvm.org/docs/JSONCompilationDatabase.html
% clang-modernize -p . -include . -add-override
% make format
```

Test Plan:
Make sure all tests are passing.
```lang=bash
% #Use default fb code clang.
% make check
```
Verify less error and no missing override errors.
```lang=bash
% # Have trunk clang present in path.
% ROCKSDB_NO_FBCODE=1 CC=clang CXX=clang++ make
```

Reviewers: igor, kradhakrishnan, rven, meyering, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D34077
2015-02-26 11:28:41 -08:00
krad
d9f4875e52 Disable pre-fetching of index and filter blocks for sst_dump_tool.
Summary:
BlockBasedTable pre-fetches the filter and index blocks on Open call.
This is an optimistic optimization targeted for runtime scenario. The
optimization is unnecessary for sst_dump_tool

- Added a provision to disable pre-fetching of index and filter blocks
  in BlockBasedTable
- Disabled pre-fetching for the sst_dump tool

Stack for reference :

#01  0x00000000005ed944 in snappy::InternalUncompress<snappy::SnappyArrayWriter> () from /home/engshare/third-party2/snappy/1.0.3/src/snappy-1.0.3/snappy.cc:148
#02  0x00000000005edeee in snappy::RawUncompress () from /home/engshare/third-party2/snappy/1.0.3/src/snappy-1.0.3/snappy.cc:947
#03  0x00000000004e0b4d in rocksdb::UncompressBlockContents () from /data/users/paultuckfield/rocksdb/./util/compression.h:69
#04  0x00000000004e145c in rocksdb::ReadBlockContents () from /data/users/paultuckfield/rocksdb/table/format.cc:334
#05  0x00000000004ca424 in rocksdb::(anonymous namespace)::ReadBlockFromFile () from /data/users/paultuckfield/rocksdb/table/block_based_table_reader.cc:70
#06  0x00000000004cccad in rocksdb::BlockBasedTable::CreateIndexReader () from /data/users/paultuckfield/rocksdb/table/block_based_table_reader.cc:173
#07  0x00000000004d17e5 in rocksdb::BlockBasedTable::Open () from /data/users/paultuckfield/rocksdb/table/block_based_table_reader.cc:553
#08  0x00000000004c8184 in rocksdb::BlockBasedTableFactory::NewTableReader () from /data/users/paultuckfield/rocksdb/table/block_based_table_factory.cc:51
#09  0x0000000000598463 in rocksdb::SstFileReader::NewTableReader () from /data/users/paultuckfield/rocksdb/util/sst_dump_tool.cc:69
#10  0x00000000005986c2 in rocksdb::SstFileReader::SstFileReader () from /data/users/paultuckfield/rocksdb/util/sst_dump_tool.cc:26
#11  0x0000000000599047 in rocksdb::SSTDumpTool::Run () from /data/users/paultuckfield/rocksdb/util/sst_dump_tool.cc:332
#12  0x0000000000409b06 in main () from /data/users/paultuckfield/rocksdb/tools/sst_dump.cc:12

Test Plan:
- Added a unit test to trigger the code.
- Also did some manual verification.
- Passed all unit tests

task #6296048

Reviewers: igor, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D34041
2015-02-25 16:34:26 -08:00
Igor Sugak
62f7a1be4f rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings
Summary:
This diff contains trivial fixes for 6 scan-build warnings:

**db/c_test.c**
`db` variable is never read. Removed assignment.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-9b77d2.html#EndPath

**db/db_iter.cc**
`skipping` local variable is assigned to false. Then in the next switch block the only "non return" case assign `skipping` to true, the rest cases don't use it and all do return.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-13fca7.html#EndPath

**db/log_reader.cc**
In `bool Reader::SkipToInitialBlock()` `offset_in_block` local variable is assigned to 0 `if (offset_in_block > kBlockSize - 6)` and then never used. Removed the assignment and renamed it to `initial_offset_in_block` to avoid confusion.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-a618dd.html#EndPath

In `bool Reader::ReadRecord(Slice* record, std::string* scratch)` local variable `in_fragmented_record` in switch case `kFullType` block is assigned to false and then does `return` without use. In the other switch case `kFirstType` block the same `in_fragmented_record` is assigned to false, but later assigned to true without prior use. Removed assignment for both cases.
scan-build reprots:
http://home.fburl.com/~sugak/latest20/report-bb86b0.html#EndPath
http://home.fburl.com/~sugak/latest20/report-a975be.html#EndPath

**table/plain_table_key_coding.cc**
Local variable `user_key_size` is assigned when declared. But then in both places where it is used assigned to `static_cast<uint32_t>(key.size() - 8)`. Changed to initialize the variable to the proper value in declaration.
scan-build report:
http://home.fburl.com/~sugak/latest20/report-9e6b86.html#EndPath

**tools/db_stress.cc**
Missing `break` in switch case block. This seems to be a bug. Added missing `break`.

Test Plan:
Make sure all tests are passing and scan-build does not report 'Dead assignment' and 'Dead initialization' bugs.
```lang=bash
% make check
% make analyze
```

Reviewers: meyering, igor, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33795
2015-02-23 14:10:09 -08:00
Jim Meyering
aa5d8e6d95 table_test.cc: add missing 5th arg in TestArgs initializer
Summary:
Adding -W and -Wextra to CXXFLAGS provoked this failure:

	  table/table_test.cc:1854:56: error: missing initializer for member ‘rocksdb::TestArgs::format_version’ [-Werror=missing-field-initializers]
	     TestArgs args = { DB_TEST, false, 16, kNoCompression };
	                                                          ^

Add the missing, 5th value (format_version).

Test Plan:
  Run "make EXTRA_CXXFLAGS='-W -Wextra'" and see fewer errors.

Reviewers: ljin, sdong, igor.sugak, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D33765
2015-02-20 11:07:11 -08:00
Jim Meyering
9283c7afd2 build: remove always-true assertions
Summary:
Remove some always-true assertions.
They provoke these compilation failures:

  table/plain_table_key_coding.cc:279:20: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
  db/version_set.cc:336:15: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]

* table/plain_table_key_coding.cc (rocksdb): Remove assertion that
unsigned type variable is >= 0.
* db/version_set.cc (DoGenerateLevelFilesBrief): Likewise.

Test Plan:
  Run "make EXTRA_CXXFLAGS='-W -Wextra'" and see fewer errors.

Reviewers: ljin, sdong, igor.sugak, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D33747
2015-02-20 11:07:03 -08:00
Igor Sugak
98870c7b9c rocksdb: Fix scan-build memory warning in table/block_based_table_reader.cc
Summary:
scan-build is reporting two memory leak bugs in `table/block_based_table_reader.cc`. They are both false positives. In both cases we allocate memory in `ReadBlockFromFile` if `s.ok()`. Then after the function `ReadBlockFromFile` returns we check for the same variable if `s.ok()` and then use the memory that was allocated. The bugs reported by scan-build is if `ReadBlockFromFile` allocates memory and returns, but for some reason status `s` is not the same and `s.ok() != true`.

In this case scan-build is concerned that memory owner transfer is not explicit. I modified `ReadBlockFromFile` to accept `std::unique_ptr<Block>*` as a parameter, instead of raw pointer.

scan-build reports:
http://home.fburl.com/~sugak/latest2/report-a4b3fa.html#EndPath
http://home.fburl.com/~sugak/latest2/report-29adbf.html#EndPath

Test Plan:
Make sure scan-build does not report these bugs and all tests are passing.
```lang=bash
% make check
% make analyze
```

Reviewers: sdong, lgalanis, meyering, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D33681
2015-02-19 14:07:38 -08:00
sdong
68af7811ea Remember whole key/prefix filtering on/off in SST file
Summary: Remember whole key or prefix filtering on/off in SST files. If user opens the DB with a different setting that cannot be satisfied while reading the SST file, ignore the bloom filter.

Test Plan: Add a unit test for it

Reviewers: yhchiang, igor, rven

Reviewed By: rven

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D32889
2015-02-11 11:20:04 -08:00
sdong
e63140d52b Get() to use prefix bloom filter when filter is not block based
Summary:
Get() now doesn't make use of bloom filter if it is prefix based. Add the check.
Didn't touch block based bloom filter. I can't fully reason whether it is correct to do that. But it's straight-forward to for full bloom filter.

Test Plan:
make all check
Add a test case in DBTest

Reviewers: rven, yhchiang, igor

Reviewed By: igor

Subscribers: MarkCallaghan, leveldb, dhruba, yoshinorim

Differential Revision: https://reviews.facebook.net/D31941
2015-02-04 15:15:41 -08:00
Igor Canadi
9ab5adfc59 New BlockBasedTable version -- better compressed block format
Summary:
This diff adds BlockBasedTable format_version = 2. New format version brings better compressed block format for these compressions:
1) Zlib -- encode decompressed size in compressed block header
2) BZip2 -- encode decompressed size in compressed block header
3) LZ4 and LZ4HC -- instead of doing memcpy of size_t encode size as varint32. memcpy is very bad because the DB is not portable accross big/little endian machines or even platforms where size_t might be 8 or 4 bytes.

It does not affect format for snappy.

If you write a new database with format_version = 2, it will not be readable by RocksDB versions before 3.10. DB::Open() will return corruption in that case.

Test Plan:
Added a new test in db_test.
I will also run db_bench and verify VSIZE when block_cache == 1GB

Reviewers: yhchiang, rven, MarkCallaghan, dhruba, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D31461
2015-01-14 16:24:24 -08:00
Igor Canadi
96b8240bc5 Support footer versions bigger than 1
Summary:
In this diff I add another parameter to BlockBasedTableOptions that will let users specify block based table's format. This will greatly simplify block based table's format changes in the future.

First format change that this will support is encoding decompressed size in Zlib and BZip2 blocks. This diff is blocking https://reviews.facebook.net/D31311.

Test Plan: Added a unit tests. More tests to come as part of https://reviews.facebook.net/D31311.

Reviewers: dhruba, MarkCallaghan, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D31383
2015-01-13 14:33:04 -08:00
Igor Canadi
15d2abbec3 Fix build issues 2015-01-09 13:04:06 -08:00
Igor Canadi
abb9b95ffe Move compression functions from port/ to util/
Summary: We keep checksum functions in util/, there is no reason for compression to be in port/

Test Plan: compiles

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D31281
2015-01-09 12:57:11 -08:00
Manish Patil
7ea7bdf04d Dump routine to BlockBasedTableReader
Summary: Added necessary routines for dumping block based SST with block filter

Test Plan: Added "raw" mode to utility sst_dump

Reviewers: sdong, rven

Reviewed By: rven

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D29679
2014-12-23 13:24:07 -08:00
Jonah Cohen
a14b7873ee Enforce write buffer memory limit across column families
Summary:
Introduces a new class for managing write buffer memory across column
families.  We supplement ColumnFamilyOptions::write_buffer_size with
ColumnFamilyOptions::write_buffer, a shared pointer to a WriteBuffer
instance that enforces memory limits before flushing out to disk.

Test Plan: Added SharedWriteBuffer unit test to db_test.cc

Reviewers: sdong, rven, ljin, igor

Reviewed By: igor

Subscribers: tnovak, yhchiang, dhruba, xjin, MarkCallaghan, yoshinorim

Differential Revision: https://reviews.facebook.net/D22581
2014-12-02 12:09:20 -08:00
Yueh-Hsuan Chiang
7e608e2fe3 Block plain_table_index.cc in ROCKSDB_LITE
Summary: Block plain_table_index.cc in ROCKSDB_LITE

Test Plan:
make clean
make OPT=-DROCKSDB_LITE shared_lib -j32
make clean
make shared_lib -j32

Reviewers: ljin, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D29535
2014-11-24 20:47:27 -08:00
Yueh-Hsuan Chiang
13de000f07 Add rocksdb::ToString() to address cases where std::to_string is not available.
Summary:
In some environment such as android, the c++ library does not have
std::to_string.  This path adds rocksdb::ToString(), which wraps std::to_string
when std::to_string is not available, and implements std::to_string
in the other case.

Test Plan:
make dbg -j32
./db_test
make clean
make dbg OPT=-DOS_ANDROID -j32
./db_test

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D29181
2014-11-24 20:44:49 -08:00
Bryan Rosario
9e285d4238 Added CompatibleOptions for compatibility with LevelDB Options
Summary: Created a CompatibleOptions object that can be used as a LevelDB Options object and then converted to a RocksDB Options object using the ConvertOptions() method.

Test Plan: Unit test included in diff.

Reviewers: ljin

Reviewed By: ljin

Subscribers: sdong, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28893
2014-11-20 19:24:39 -08:00
Lei Jin
8d3f8f9696 remove all remaining references to cfd->options()
Summary:
The very last reference happens in DBImpl::GetOptions()
I built with both DBImpl::GetOptions() and ColumnFamilyData::options() commented out

Test Plan: make all check

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D29073
2014-11-18 10:20:10 -08:00
Igor Canadi
9be338cf9d CompactionJobTest
Summary:
This is just a simple test that passes two files though a compaction. It shows the framework so that people can continue building new compaction *unit* tests.
In the future we might want to move some Compaction* tests from DBTest here. For example, CompactBetweenSnapshot seems a good candidate.

Hopefully this test can be simpler when we mock out VersionSet.

Test Plan: this is a test

Reviewers: ljin, rven, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28449
2014-11-14 11:35:48 -08:00
sdong
a177742a9b Make db_stress built for ROCKSDB_LITE
Summary:
Make db_stress built for ROCKSDB_LITE.
The test doesn't pass tough. It seg fault quickly. But I took a look and it doesn't seem to be related to lite version. Likely to be a bug inside RocksDB.

Test Plan: make db_stress

Reviewers: yhchiang, rven, ljin, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D28797
2014-11-14 10:20:51 -08:00
Igor Canadi
25f273027b Fix iOS compile with -Wshorten-64-to-32
Summary: So iOS size_t is 32-bit, so we need to static_cast<size_t> any uint64_t :(

Test Plan: TARGET_OS=IOS make static_lib

Reviewers: dhruba, ljin, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28743
2014-11-13 14:39:30 -05:00
Igor Canadi
767777c2bd Turn on -Wshorten-64-to-32 and fix all the errors
Summary:
We need to turn on -Wshorten-64-to-32 for mobile. See D1671432 (internal phabricator) for details.

This diff turns on the warning flag and fixes all the errors. There were also some interesting errors that I might call bugs, especially in plain table. Going forward, I think it makes sense to have this flag turned on and be very very careful when converting 64-bit to 32-bit variables.

Test Plan: compiles

Reviewers: ljin, rven, yhchiang, sdong

Reviewed By: yhchiang

Subscribers: bobbaldwin, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28689
2014-11-11 16:47:22 -05:00
Igor Canadi
68effa0348 Fix -Wshadow for tools
Summary: Previously I made `make check` work with -Wshadow, but there are some tools that are not compiled using `make check`.

Test Plan: make all

Reviewers: yhchiang, rven, ljin, sdong

Reviewed By: ljin, sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28497
2014-11-07 15:04:30 -08:00
Igor Canadi
9f20395cd6 Turn -Wshadow back on
Summary: It turns out that -Wshadow has different rules for gcc than clang. Previous commit fixed clang. This commits fixes the rest of the warnings for gcc.

Test Plan: compiles

Reviewers: ljin, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28131
2014-11-06 11:14:28 -08:00
Igor Canadi
9f7fc3ac45 Turn on -Wshadow
Summary:
...and fix all the errors :)

Jim suggested turning on -Wshadow because it helped him fix number of critical bugs in fbcode. I think it's a good idea to be -Wshadow clean.

Test Plan: compiles

Reviewers: yhchiang, rven, sdong, ljin

Reviewed By: ljin

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27711
2014-10-31 11:59:54 -07:00
Yueh-Hsuan Chiang
98849a35fa Apply InfoLogLevel to the logs in table/block_based_table_reader.cc
Summary:
Apply InfoLogLevel to the logs in table/block_based_table_reader.cc

Also, add missing checks for the returned status in BlockBasedTable::Open

Test Plan: make

Reviewers: sdong, ljin, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D28005
2014-10-31 11:41:15 -07:00
Yueh-Hsuan Chiang
217cc217d7 Apply InfoLogLevel to the logs in table/meta_blocks.cc
Summary: Apply InfoLogLevel to the logs in table/meta_blocks.cc

Test Plan: make

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27903
2014-10-29 17:55:19 -07:00
Yueh-Hsuan Chiang
fd95745a59 Fix compile error in table/plain_table_index.cc
Summary:
Fix compile error in table/plain_table_index.cc

Test Plan:
make
2014-10-29 17:42:38 -07:00
Yueh-Hsuan Chiang
e7ad69b9fe Apply InfoLogLevel to the logs in table/plain_table_index.cc
Summary: Apply InfoLogLevel to the logs in table/plain_table_index.cc

Test Plan: make

Reviewers: ljin, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27909
2014-10-29 17:08:40 -07:00
Yueh-Hsuan Chiang
bbd9c53457 Apply InfoLogLevel to the logs in table/block_based_table_builder.cc
Summary: Apply InfoLogLevel to the logs in table/block_based_table_builder.cc

Test Plan: make

Reviewers: igor, ljin, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27921
2014-10-29 17:08:20 -07:00
Igor Canadi
412b7f85bb Include atomic in mock_table.h 2014-10-28 18:10:55 -07:00
Igor Canadi
abac3d6476 TableMock + framework for mock classes
Summary:
This diff replaces BlockBasedTable in flush_job_test with TableMock, making it depend on less things and making it closer to an unit test than integration test.

It also introduces a framework to compile mock classes -- Any file named *mock.cc will not be compiled into the build. It will only get compiled into the tests. What way we can mock out most other classes, Version, VersionSet, DBImpl, etc.

Test Plan: flush_job_test

Reviewers: ljin, rven, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D27681
2014-10-28 17:52:32 -07:00
Igor Canadi
c1c68bce43 remove atomic_pointer.h references 2014-10-27 15:12:20 -07:00
Lei Jin
f1841985e4 dynamic inplace_update options
Summary:
Make inplace_update_support and inplace_update_num_locks dynamic.
inplace_callback becomes immutable
We are almost free of references to cfd->options() in db_impl

Test Plan: unit test

Reviewers: igor, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D25293
2014-10-27 12:10:13 -07:00
Lei Jin
839c376bd1 fix table_test
Summary:
SaveValue expects an internal key but I previously added to table a
user key

Test Plan:
ran the test
2014-10-22 13:53:35 -07:00
Lei Jin
0fd985f427 Avoid reloading filter on Get() if cache_index_and_filter_blocks == false
Summary:
This fixes the case that filter policy is missing in SST file, but we
open the table with filter policy on and cache_index_and_filter_blocks =
false. The current behavior is that we will try to load it every time on
Get() but fail.

Test Plan: unit test

Reviewers: yhchiang, igor, rven, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D25455
2014-10-22 11:52:35 -07:00
Lei Jin
2dd9bfe3a8 Sanitize block-based table index type and check prefix_extractor
Summary:
Respond to issue reported
https://www.facebook.com/groups/rocksdb.dev/permalink/651090261656158/
Change the Sanitize signature to take both DBOptions and CFOptions

Test Plan: unit test

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D25041
2014-10-17 21:18:36 -07:00
Igor Canadi
d6987216c9 Merge pull request #327 from dalgaaf/wip-da-SCA-20141001
Fix some issues from SCA
2014-10-02 10:59:52 -07:00
Lei Jin
5ec53f3edf make compaction related options changeable
Summary:
make compaction related options changeable. Most of changes are tedious,
following the same convention: grabs MutableCFOptions at the beginning
of compaction under mutex, then pass it throughout the job and register
it in SuperVersion at the end.

Test Plan: make all check

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23349
2014-10-01 16:19:16 -07:00
Danny Al-Gaaf
28a6e31583 table/block_based_table_builder.cc: remove unused variable
Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-10-01 10:49:09 +02:00
Danny Al-Gaaf
6b6cedbb1b table/format.cc: reduce scope of some variables
Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-10-01 10:49:08 +02:00
Danny Al-Gaaf
55652043c8 table/cuckoo_table_reader.cc: pass func parameter by reference
Fix for:

[table/cuckoo_table_reader.cc:196]: (performance) Function
 parameter 'target' should be passed by reference.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-10-01 10:49:08 +02:00
Danny Al-Gaaf
d517c83648 in_table_factory.cc: use correct format specifier
Use %zu instead of %zd since size_t and uint32_t are unsigned.

Fix for:

[table/plain_table_factory.cc:55]: (warning) %zd in format string (no. 1)
 requires 'ssize_t' but the argument type is 'size_t {aka unsigned long}'.
[table/plain_table_factory.cc:58]: (warning) %zd in format string (no. 1)
 requires 'ssize_t' but the argument type is 'size_t {aka unsigned long}'.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-09-30 23:30:32 +02:00
Danny Al-Gaaf
063471bf76 table/table_test.cc: pass func parameter by reference
Fix for:

[table/table_test.cc:1218]: (performance) Function parameter
 'prefix' should be passed by reference.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-09-30 23:30:32 +02:00
Danny Al-Gaaf
93548ce8f4 table/cuckoo_table_reader.cc: pass func parameter by ref
Fix for:

[table/cuckoo_table_reader.cc:198]: (performance) Function
 parameter 'file_data' should be passed by reference.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-09-30 23:30:32 +02:00
Danny Al-Gaaf
8ce050b51b table/bloom_block.*: pass func parameter by reference
[table/bloom_block.h:29]: (performance) Function parameter
 'keys_hashes' should be passed by reference.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
2014-09-30 23:30:31 +02:00
Lei Jin
2faf49d5f1 use GetContext to replace callback function pointer
Summary:
Intead of passing callback function pointer and its arg on Table::Get()
interface, passing GetContext. This makes the interface cleaner and
possible better perf. Also adding a fast pass for SaveValue()

Test Plan: make all check

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D24057
2014-09-29 11:09:09 -07:00
Lei Jin
2dc6f62bb9 handle kDelete type in cuckoo builder
Summary:
when I changed std::vector<std::string, std::string> to std::string to
store key/value pairs in builder, I missed the handling for kDeletion
type. As a result, value_size_ can be wrong if the first add key is for
deletion.
The is captured by ./cuckoo_table_db_test

Test Plan:
./cuckoo_table_db_test
./cuckoo_table_reader_test
./cuckoo_table_builder_test

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D24045
2014-09-29 10:25:21 -07:00
Lei Jin
d439451fab delay initialization of cuckoo table iterator
Summary:
cuckoo table iterator creation is quite expensive since it needs to load
all data and sort them. After compaction, RocksDB creates a new iterator
of the new file to make sure it is in good state. That makes the DB
creation quite slow. Delay the iterator db sort to the seek time to
speed it up.

Test Plan: db_bench

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23775
2014-09-25 16:45:37 -07:00
Lei Jin
94997eab5e reduce memory usage of cuckoo table builder
Summary:
builder currently buffers all key value pairs as a vector of
pair<string, string>. That is too much due to std::string
overhead. It wasn't able to fit 1B key/values (12bytes total) in 100GB
of ram. Switch to use a plain string to store the key/value sequence and
use only 12GB of ram as a result.

Test Plan: db_bench

Reviewers: igor, sdong, yhchiang

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23763
2014-09-25 16:34:24 -07:00
Lei Jin
c6275956e2 improve memory efficiency of cuckoo reader
Summary:
When creating a new iterator, instead of storing mapping from key to
bucket id for sorting, store only bucket id and read key from mmap file
based on the id. This reduces from 20 bytes per entry to only 4 bytes.

Test Plan: db_bench

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23757
2014-09-25 16:15:23 -07:00
Lei Jin
581442d446 option to choose module when calculating CuckooTable hash
Summary:
Using module to calculate hash makes lookup ~8% slower. But it has its
benefit: file size is more predictable, more space enffient

Test Plan: db_bench

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23691
2014-09-25 13:53:27 -07:00
Lei Jin
3c68006109 CompactedDBImpl
Summary:
Add a CompactedDBImpl that will enabled when calling OpenForReadOnly()
and the DB only has one level (>0) of files. As a performan comparison,
CuckooTable performs 2.1M/s with CompactedDBImpl vs. 1.78M/s with
ReadOnlyDBImpl.

Test Plan: db_bench

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23553
2014-09-25 11:14:01 -07:00
Lei Jin
0a29ce5393 re-enable BlockBasedTable::SetupForCompaction()
Summary:
It was commented out in D22545 by accident. Keep the option in
ImmutableOptions for now. I can make it dynamic in
https://reviews.facebook.net/D23349

Test Plan: make release

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23865
2014-09-23 14:18:57 -07:00
Igor Canadi
55af370756 Remove TODO for checking index checksums 2014-09-23 13:02:23 -07:00
Igor Canadi
3d74f09979 Fix compile 2014-09-22 15:19:20 -07:00
liuchang0812
4436f17bd8 fixed #303: replace %ld with % PRId64 2014-09-21 22:09:48 +08:00
Lei Jin
51af7c326c CuckooTable: add one option to allow identity function for the first hash function
Summary:
MurmurHash becomes expensive when we do millions Get() a second in one
thread. Add this option to allow the first hash function to use identity
function as hash function. It results in QPS increase from 3.7M/s to
~4.3M/s. I did not observe improvement for end to end RocksDB
performance. This may be caused by other bottlenecks that I will address
in a separate diff.

Test Plan:
```
[ljin@dev1964 rocksdb] ./cuckoo_table_reader_test --enable_perf --file_dir=/dev/shm --write --identity_as_first_hash=0
==== Test CuckooReaderTest.WhenKeyExists
==== Test CuckooReaderTest.WhenKeyExistsWithUint64Comparator
==== Test CuckooReaderTest.CheckIterator
==== Test CuckooReaderTest.CheckIteratorUint64
==== Test CuckooReaderTest.WhenKeyNotFound
==== Test CuckooReaderTest.TestReadPerformance
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.272us (3.7 Mqps) with batch size of 0, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.138us (7.2 Mqps) with batch size of 10, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.142us (7.1 Mqps) with batch size of 25, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.142us (7.0 Mqps) with batch size of 50, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.144us (6.9 Mqps) with batch size of 100, # of found keys 125829120

With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.201us (5.0 Mqps) with batch size of 0, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.121us (8.3 Mqps) with batch size of 10, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.123us (8.1 Mqps) with batch size of 25, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.121us (8.3 Mqps) with batch size of 50, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.112us (8.9 Mqps) with batch size of 100, # of found keys 104857600

With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.251us (4.0 Mqps) with batch size of 0, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.107us (9.4 Mqps) with batch size of 10, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.099us (10.1 Mqps) with batch size of 25, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.100us (10.0 Mqps) with batch size of 50, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.116us (8.6 Mqps) with batch size of 100, # of found keys 83886080

With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.189us (5.3 Mqps) with batch size of 0, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.095us (10.5 Mqps) with batch size of 10, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.096us (10.4 Mqps) with batch size of 25, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.098us (10.2 Mqps) with batch size of 50, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.105us (9.5 Mqps) with batch size of 100, # of found keys 73400320

[ljin@dev1964 rocksdb] ./cuckoo_table_reader_test --enable_perf --file_dir=/dev/shm --write --identity_as_first_hash=1
==== Test CuckooReaderTest.WhenKeyExists
==== Test CuckooReaderTest.WhenKeyExistsWithUint64Comparator
==== Test CuckooReaderTest.CheckIterator
==== Test CuckooReaderTest.CheckIteratorUint64
==== Test CuckooReaderTest.WhenKeyNotFound
==== Test CuckooReaderTest.TestReadPerformance
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.230us (4.3 Mqps) with batch size of 0, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.086us (11.7 Mqps) with batch size of 10, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.088us (11.3 Mqps) with batch size of 25, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.083us (12.1 Mqps) with batch size of 50, # of found keys 125829120
With 125829120 items, utilization is 93.75%, number of hash functions: 2.
Time taken per op is 0.083us (12.1 Mqps) with batch size of 100, # of found keys 125829120

With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.159us (6.3 Mqps) with batch size of 0, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.078us (12.8 Mqps) with batch size of 10, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.080us (12.6 Mqps) with batch size of 25, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.080us (12.5 Mqps) with batch size of 50, # of found keys 104857600
With 104857600 items, utilization is 78.12%, number of hash functions: 2.
Time taken per op is 0.082us (12.2 Mqps) with batch size of 100, # of found keys 104857600

With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.154us (6.5 Mqps) with batch size of 0, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.077us (13.0 Mqps) with batch size of 10, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.077us (12.9 Mqps) with batch size of 25, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.078us (12.8 Mqps) with batch size of 50, # of found keys 83886080
With 83886080 items, utilization is 62.50%, number of hash functions: 2.
Time taken per op is 0.079us (12.6 Mqps) with batch size of 100, # of found keys 83886080

With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.218us (4.6 Mqps) with batch size of 0, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.083us (12.0 Mqps) with batch size of 10, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.085us (11.7 Mqps) with batch size of 25, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.086us (11.6 Mqps) with batch size of 50, # of found keys 73400320
With 73400320 items, utilization is 54.69%, number of hash functions: 2.
Time taken per op is 0.078us (12.8 Mqps) with batch size of 100, # of found keys 73400320
```

Reviewers: sdong, igor, yhchiang

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23451
2014-09-18 11:00:48 -07:00
Igor Canadi
ff76895614 Remove some unnecessary constructors
Summary:
This is continuing the work done by 27b22f13a3

It's just cleaning up some unnecessary constructors. The most important change is removing Block::Block(const BlockContents& contents) constructor. It was only used from the unit test.

Test Plan: compiles

Reviewers: sdong, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23547
2014-09-17 16:45:58 -07:00
Lei Jin
feadb9df53 fix cuckoo table builder test
Summary:
as title

Test Plan:
./cuckoo_table_builder_test

Reviewers:igor

CC:leveldb

Task ID: #

Blame Rev:
2014-09-17 15:48:33 -07:00
Igor Canadi
54cada92b1 Run make format on PR #249 2014-09-17 15:08:50 -07:00
Igor Canadi
27b22f13a3 Merge pull request #249 from tdfischer/decompression-refactoring
Decompression refactoring
2014-09-17 15:01:40 -07:00
Torrie Fischer
fb6456b00d Replace naked calls to operator new and delete (Fixes #222)
This replaces a mishmash of pointers in the Block and BlockContents classes with
std::unique_ptr. It also changes the semantics of BlockContents to be limited to
use as a constructor parameter for Block objects, as it owns any block buffers
handed to it.
2014-09-17 13:50:07 -07:00
Lei Jin
5600c8f6e5 cuckoo table: return estimated size - 1
Summary:
This is to avoid cutting file prematurely and resulting file size to be
half of specified.

Test Plan: db_bench

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23541
2014-09-17 13:25:29 -07:00
Lei Jin
a062e1f2c4 SetOptions() for memtable related options
Summary: as title

Test Plan:
make all check
I will think a way to set up stress test for this

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23055
2014-09-17 12:49:13 -07:00
Igor Canadi
faad439ac4 Fix #284
Summary: This work on my compiler, but it turns out some compilers don't implicitly add constness, see: https://github.com/facebook/rocksdb/issues/284. This diff adds constness explicitly.

Test Plan: still compiles

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23409
2014-09-16 10:30:32 -07:00
Igor Canadi
059e584dd3 [unit test] CompactRange should fail if we don't have space
Summary:
See t5106397.

Also, few more changes:
1. in unit tests, the assumption is that writes will be dropped when there is no space left on device. I changed the wording around it.
2. InvalidArgument() errors are only when user-provided arguments are invalid. When the file is corrupted, we need to return Status::Corruption

Test Plan: make check

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23145
2014-09-10 17:00:00 -07:00
Igor Canadi
6bb7e3ef25 Merger test
Summary: I abandoned https://reviews.facebook.net/D18789, but I wrote a good unit test there, so let's check it in. :)

Test Plan: this is test

Reviewers: sdong, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22827
2014-09-08 22:24:40 -07:00
Lei Jin
52311463e9 MemTableOptions
Summary: removed reference to options in WriteBatch and DBImpl::Get()

Test Plan: make all check

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D23049
2014-09-08 18:46:52 -07:00
Feng Zhu
0af157f9bf Implement full filter for block based table.
Summary:
1. Make filter_block.h a base class. Derive block_based_filter_block and full_filter_block. The previous one is the traditional filter block. The full_filter_block is newly added. It would generate a filter block that contain all the keys in SST file.

2. When querying a key, table would first check if full_filter is available. If not, it would go to the exact data block and check using block_based filter.

3. User could choose to use full_filter or tradional(block_based_filter). They would be stored in SST file with different meta index name. "filter.filter_policy" or "full_filter.filter_policy". Then, Table reader is able to know the fllter block type.

4. Some optimizations have been done for full_filter_block, thus it requires a different interface compared to the original one in filter_policy.h.

5. Actual implementation of filter bits coding/decoding is placed in util/bloom_impl.cc

Benchmark: base commit 1d23b5c470
Command:
db_bench --db=/dev/shm/rocksdb --num_levels=6 --key_size=20 --prefix_size=20 --keys_per_prefix=0 --value_size=100 --write_buffer_size=134217728 --max_write_buffer_number=2 --target_file_size_base=33554432 --max_bytes_for_level_base=1073741824 --verify_checksum=false --max_background_compactions=4 --use_plain_table=0 --memtablerep=prefix_hash --open_files=-1 --mmap_read=1 --mmap_write=0 --bloom_bits=10 --bloom_locality=1 --memtable_bloom_bits=500000 --compression_type=lz4 --num=393216000 --use_hash_search=1 --block_size=1024 --block_restart_interval=16 --use_existing_db=1 --threads=1 --benchmarks=readrandom —disable_auto_compactions=1
Read QPS increase for about 30% from 2230002 to 2991411.

Test Plan:
make all check
valgrind db_test
db_stress --use_block_based_filter = 0
./auto_sanity_test.sh

Reviewers: igor, yhchiang, ljin, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D20979
2014-09-08 10:37:05 -07:00
wankai
88a2f44f99 fix comments 2014-09-08 16:34:04 +08:00
wankai
823773837b replace hard-coded number with named variable 2014-09-08 11:10:17 +08:00
wankai
4c2b1f097b Merge remote-tracking branch 'upstream/master' 2014-09-06 23:23:11 +08:00
wankai
a5d2863074 typo improvement 2014-09-06 23:21:26 +08:00
Radheshyam Balasundaram
5cd0576ffe Fix compaction bug in Cuckoo Table Builder. Use kvs_.size() instead of num_entries in FileSize() method.
Summary: Fix compaction bug in Cuckoo Table Builder. Use kvs_.size() instead of num_entries in FileSize() method. Also added tests.

Test Plan:
make check all
Also ran db_bench to generate multiple files.

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22743
2014-09-05 11:18:01 -07:00
liuhuahang
bb6ae0f80c fix more compile warnings
N/A

Change-Id: I5b6f9c70aea7d3f3489328834fed323d41106d9f
Signed-off-by: liuhuahang <liuhuahang@zerus.co>
2014-09-05 14:14:37 +08:00
Stanislau Hlebik
45a5e3ede0 Remove path with arena==nullptr from NewInternalIterator
Summary:
Simply code by removing code path which does not use Arena
from NewInternalIterator

Test Plan:
make all check
make valgrind_check

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22395
2014-09-04 17:40:41 -07:00
Lei Jin
5665e5e285 introduce ImmutableOptions
Summary:
As a preparation to support updating some options dynamically, I'd like
to first introduce ImmutableOptions, which is a subset of Options that
cannot be changed during the course of a DB lifetime without restart.

ColumnFamily will keep both Options and ImmutableOptions. Any component
below ColumnFamily should only take ImmutableOptions in their
constructor. Other options should be taken from APIs, which will be
allowed to adjust dynamically.

I am yet to make changes to memtable and other related classes to take
ImmutableOptions in their ctor. That can be done in a seprate diff as
this one is already pretty big.

Test Plan: make all check

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D22545
2014-09-04 16:18:36 -07:00
Igor Canadi
f7f973d354 Merge pull request #269 from huahang/patch-2
fix a few compile warnings
2014-09-04 09:43:00 -07:00
liuhuahang
ef5b384729 fix a few compile warnings
1, const qualifiers on return types make no sense and will trigger a compile warning: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]

2, class HistogramImpl has virtual functions and thus should have a virtual destructor

3, with some toolchain, the macro __STDC_FORMAT_MACROS is predefined and thus should be checked before define

Change-Id: I69747a03bfae88671bfbb2637c80d17600159c99
Signed-off-by: liuhuahang <liuhuahang@zerus.co>
2014-09-04 23:06:23 +08:00
wankai
1785114a6f delete unused Comparator 2014-09-04 09:10:13 +08:00
wankai
19cc588b77 change to filter_block std::unique_ptr support RAII 2014-09-04 00:44:49 +08:00
wankai
5d25a46936 Merge remote-tracking branch 'upstream/master' 2014-09-03 21:57:13 +08:00
Lei Jin
9b58c73c7c call SanitizeDBOptionsByCFOptions() in the right place
Summary: It only covers Open() with default column family right now

Test Plan: make release

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22467
2014-09-02 14:42:23 -07:00
Igor Canadi
7f19bb93c6 Merge pull request #242 from tdfischer/perf-timer-destructors
Refactor PerfStepTimer to automatically stop on destruct
2014-09-02 13:06:40 -07:00
Torrie Fischer
6614a48418 Refactor PerfStepTimer to stop on destruct
This eliminates the need to remember to call PERF_TIMER_STOP when a section has
been timed. This allows more useful design with the perf timers and enables
possible return value optimizations. Simplistic example:

class Foo {
  public:
    Foo(int v) : m_v(v);
  private:
    int m_v;
}

Foo makeFrobbedFoo(int *errno)
{
  *errno = 0;
  return Foo();
}

Foo bar(int *errno)
{
  PERF_TIMER_GUARD(some_timer);

  return makeFrobbedFoo(errno);
}

int main(int argc, char[] argv)
{
  Foo f;
  int errno;

  f = bar(&errno);

  if (errno)
    return -1;
  return 0;
}

After bar() is called, perf_context.some_timer would be incremented as if
Stop(&perf_context.some_timer) was called at the end, and the compiler is still
able to produce optimizations on the return value from makeFrobbedFoo() through
to main().
2014-09-02 12:04:22 -07:00
Igor Canadi
076bd01a29 Fix compile
Summary: gcc on our dev boxes is not happy about __attribute__((unused))

Test Plan: compiles now

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22707
2014-09-02 11:49:38 -07:00
Igor Canadi
990df99a61 Fix ios compile
Summary: We need to set contbuild for this :)

Test Plan: compiles

Reviewers: sdong, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22701
2014-09-02 10:50:15 -07:00
Wankai Zhang
dff2b1a8f8 typo improvement 2014-09-02 22:57:03 +08:00
Radheshyam Balasundaram
d20b8cfaa1 Improve Cuckoo Table Reader performance. Inlined hash function and number of buckets a power of two.
Summary:
Use inlined hash functions instead of function pointer. Make number of buckets a power of two and use bitwise and instead of mod.
After these changes, we get almost 50% improvement in performance.

Results:
With 120000000 items, utilization is 89.41%, number of hash functions: 2.
Time taken per op is 0.231us (4.3 Mqps) with batch size of 0
Time taken per op is 0.229us (4.4 Mqps) with batch size of 0
Time taken per op is 0.185us (5.4 Mqps) with batch size of 0
With 120000000 items, utilization is 89.41%, number of hash functions: 2.
Time taken per op is 0.108us (9.3 Mqps) with batch size of 10
Time taken per op is 0.100us (10.0 Mqps) with batch size of 10
Time taken per op is 0.103us (9.7 Mqps) with batch size of 10
With 120000000 items, utilization is 89.41%, number of hash functions: 2.
Time taken per op is 0.101us (9.9 Mqps) with batch size of 25
Time taken per op is 0.098us (10.2 Mqps) with batch size of 25
Time taken per op is 0.097us (10.3 Mqps) with batch size of 25
With 120000000 items, utilization is 89.41%, number of hash functions: 2.
Time taken per op is 0.100us (10.0 Mqps) with batch size of 50
Time taken per op is 0.097us (10.3 Mqps) with batch size of 50
Time taken per op is 0.097us (10.3 Mqps) with batch size of 50
With 120000000 items, utilization is 89.41%, number of hash functions: 2.
Time taken per op is 0.102us (9.8 Mqps) with batch size of 100
Time taken per op is 0.098us (10.2 Mqps) with batch size of 100
Time taken per op is 0.115us (8.7 Mqps) with batch size of 100

With 100000000 items, utilization is 74.51%, number of hash functions: 2.
Time taken per op is 0.201us (5.0 Mqps) with batch size of 0
Time taken per op is 0.155us (6.5 Mqps) with batch size of 0
Time taken per op is 0.152us (6.6 Mqps) with batch size of 0
With 100000000 items, utilization is 74.51%, number of hash functions: 2.
Time taken per op is 0.089us (11.3 Mqps) with batch size of 10
Time taken per op is 0.084us (11.9 Mqps) with batch size of 10
Time taken per op is 0.086us (11.6 Mqps) with batch size of 10
With 100000000 items, utilization is 74.51%, number of hash functions: 2.
Time taken per op is 0.087us (11.5 Mqps) with batch size of 25
Time taken per op is 0.085us (11.7 Mqps) with batch size of 25
Time taken per op is 0.093us (10.8 Mqps) with batch size of 25
With 100000000 items, utilization is 74.51%, number of hash functions: 2.
Time taken per op is 0.094us (10.6 Mqps) with batch size of 50
Time taken per op is 0.094us (10.7 Mqps) with batch size of 50
Time taken per op is 0.093us (10.8 Mqps) with batch size of 50
With 100000000 items, utilization is 74.51%, number of hash functions: 2.
Time taken per op is 0.092us (10.9 Mqps) with batch size of 100
Time taken per op is 0.089us (11.2 Mqps) with batch size of 100
Time taken per op is 0.088us (11.3 Mqps) with batch size of 100

With 80000000 items, utilization is 59.60%, number of hash functions: 2.
Time taken per op is 0.154us (6.5 Mqps) with batch size of 0
Time taken per op is 0.168us (6.0 Mqps) with batch size of 0
Time taken per op is 0.190us (5.3 Mqps) with batch size of 0
With 80000000 items, utilization is 59.60%, number of hash functions: 2.
Time taken per op is 0.081us (12.4 Mqps) with batch size of 10
Time taken per op is 0.077us (13.0 Mqps) with batch size of 10
Time taken per op is 0.083us (12.1 Mqps) with batch size of 10
With 80000000 items, utilization is 59.60%, number of hash functions: 2.
Time taken per op is 0.077us (13.0 Mqps) with batch size of 25
Time taken per op is 0.073us (13.7 Mqps) with batch size of 25
Time taken per op is 0.073us (13.7 Mqps) with batch size of 25
With 80000000 items, utilization is 59.60%, number of hash functions: 2.
Time taken per op is 0.076us (13.1 Mqps) with batch size of 50
Time taken per op is 0.072us (13.8 Mqps) with batch size of 50
Time taken per op is 0.072us (13.8 Mqps) with batch size of 50
With 80000000 items, utilization is 59.60%, number of hash functions: 2.
Time taken per op is 0.077us (13.0 Mqps) with batch size of 100
Time taken per op is 0.074us (13.6 Mqps) with batch size of 100
Time taken per op is 0.073us (13.6 Mqps) with batch size of 100

With 70000000 items, utilization is 52.15%, number of hash functions: 2.
Time taken per op is 0.190us (5.3 Mqps) with batch size of 0
Time taken per op is 0.186us (5.4 Mqps) with batch size of 0
Time taken per op is 0.184us (5.4 Mqps) with batch size of 0
With 70000000 items, utilization is 52.15%, number of hash functions: 2.
Time taken per op is 0.079us (12.7 Mqps) with batch size of 10
Time taken per op is 0.070us (14.2 Mqps) with batch size of 10
Time taken per op is 0.072us (14.0 Mqps) with batch size of 10
With 70000000 items, utilization is 52.15%, number of hash functions: 2.
Time taken per op is 0.080us (12.5 Mqps) with batch size of 25
Time taken per op is 0.072us (14.0 Mqps) with batch size of 25
Time taken per op is 0.071us (14.1 Mqps) with batch size of 25
With 70000000 items, utilization is 52.15%, number of hash functions: 2.
Time taken per op is 0.082us (12.1 Mqps) with batch size of 50
Time taken per op is 0.071us (14.1 Mqps) with batch size of 50
Time taken per op is 0.073us (13.6 Mqps) with batch size of 50
With 70000000 items, utilization is 52.15%, number of hash functions: 2.
Time taken per op is 0.080us (12.5 Mqps) with batch size of 100
Time taken per op is 0.077us (13.0 Mqps) with batch size of 100
Time taken per op is 0.078us (12.8 Mqps) with batch size of 100

Test Plan:
make check all
make valgrind_check
make asan_check

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22539
2014-08-29 19:06:15 -07:00
Tomislav Novak
0f9c43ea36 ForwardIterator: reset incomplete iterators on Seek()
Summary:
When reading from kBlockCacheTier, ForwardIterator's internal child iterators
may end up in the incomplete state (read was unable to complete without doing
disk I/O). `ForwardIterator::status()` will correctly report that; however, the
iterator may be stuck in that state until all sub-iterators are rebuilt:

  * `NeedToSeekImmutable()` may return false even if some sub-iterators are
    incomplete
  * one of the child iterators may be an empty iterator without any state other
    that the kIncomplete status (created using `NewErrorIterator()`); seeking on
    any such iterator has no effect -- we need to construct it again

Akin to rebuilding iterators after a superversion bump, this diff makes forward
iterator reset all incomplete child iterators when `Seek()` or `Next()` are
called.

Test Plan: TEST_TMPDIR=/dev/shm/rocksdbtest ROCKSDB_TESTS=TailingIterator ./db_test

Reviewers: igor, sdong, ljin

Reviewed By: ljin

Subscribers: lovro, march, leveldb

Differential Revision: https://reviews.facebook.net/D22575
2014-08-29 16:21:29 -07:00
Igor Canadi
22a0a60dc4 Merge pull request #250 from wankai/master
delete unused struct Options
2014-08-29 09:53:18 -04:00
Wankai Zhang
be25ee44fe delete unused struct Options 2014-08-29 17:31:04 +08:00
Feng Zhu
1d23b5c470 remove_internal_filter_policy
Summary:
1. remove class InternalFilterPolicy in db/dbformat.h
2. Transformation from internal key to user key is done in filter_block.cc
3. This is a preparation for patch D20979

Test Plan:
make all check
valgrind ./db_test

Reviewers: igor, yhchiang, ljin, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22509
2014-08-28 17:06:29 -07:00
Radheshyam Balasundaram
7f71448388 Implementing a cache friendly version of Cuckoo Hash
Summary: This implements a cache friendly version of Cuckoo Hash in which, in case of collission, we try to insert in next few locations. The size of the neighborhood to check is taken as an input parameter in builder and stored in the table.

Test Plan:
make check all
cuckoo_table_{db,reader,builder}_test

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22455
2014-08-28 10:42:23 -07:00
Wankai Zhang
528a11c635 Update block_builder.h
more c++11 way noncopyable and keep parameter's name of constructor consistent
2014-08-28 13:37:10 +08:00
Radheshyam Balasundaram
4142a3e783 Adding a user comparator for comparing Uint64 slices.
Summary:
- New Uint64 comparator
- Modify Reader and Builder to take custom user comparators instead of bytewise comparator
- Modify logic for choosing unused user key in builder
- Modify iterator logic in reader
- test changes

Test Plan:
cuckoo_table_{builder,reader,db}_test
make check all

Reviewers: ljin, sdong

Reviewed By: ljin

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D22377
2014-08-27 10:39:31 -07:00
Lei Jin
23861857c4 ReadOptions.total_order_seek to allow total order seek for block-based table when hash index is enabled
Summary: as title

Test Plan: table_test

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22239
2014-08-25 16:14:30 -07:00
Lei Jin
a98badff16 print table options
Summary: Add a virtual function in table factory that will print table options

Test Plan: make release

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22149
2014-08-25 14:24:09 -07:00
Lei Jin
384400128f move block based table related options BlockBasedTableOptions
Summary:
I will move compression related options in a separate diff since this
diff is already pretty lengthy.
I guess I will also need to change JNI accordingly :(

Test Plan: make all check

Reviewers: yhchiang, igor, sdong

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21915
2014-08-25 14:22:05 -07:00
Shao Yu Zhang
f76eda74d6 Fix compilation issue on OSX 2014-08-21 18:11:33 -07:00
Radheshyam Balasundaram
08be7f5266 Implement Prepare method in CuckooTableReader
Summary:
- Implement Prepare method
- Rewrite performance tests in cuckoo_table_reader_test to write new file only if one doesn't already exist.
- Add performance tests for batch lookup along with prefetching.

Test Plan:
./cuckoo_table_reader_test --enable_perf
Results (We get better results if we used int64 comparator instead of string comparator (TBD in future diffs)):
With 100000000 items and hash table ratio 0.500000, number of hash functions used: 2.
Time taken per op is 0.208us (4.8 Mqps) with batch size of 0
With 100000000 items and hash table ratio 0.500000, number of hash functions used: 2.
Time taken per op is 0.182us (5.5 Mqps) with batch size of 10
With 100000000 items and hash table ratio 0.500000, number of hash functions used: 2.
Time taken per op is 0.161us (6.2 Mqps) with batch size of 25
With 100000000 items and hash table ratio 0.500000, number of hash functions used: 2.
Time taken per op is 0.161us (6.2 Mqps) with batch size of 50
With 100000000 items and hash table ratio 0.500000, number of hash functions used: 2.
Time taken per op is 0.163us (6.1 Mqps) with batch size of 100

With 100000000 items and hash table ratio 0.600000, number of hash functions used: 3.
Time taken per op is 0.252us (4.0 Mqps) with batch size of 0
With 100000000 items and hash table ratio 0.600000, number of hash functions used: 3.
Time taken per op is 0.192us (5.2 Mqps) with batch size of 10
With 100000000 items and hash table ratio 0.600000, number of hash functions used: 3.
Time taken per op is 0.195us (5.1 Mqps) with batch size of 25
With 100000000 items and hash table ratio 0.600000, number of hash functions used: 3.
Time taken per op is 0.191us (5.2 Mqps) with batch size of 50
With 100000000 items and hash table ratio 0.600000, number of hash functions used: 3.
Time taken per op is 0.194us (5.1 Mqps) with batch size of 100

With 100000000 items and hash table ratio 0.750000, number of hash functions used: 3.
Time taken per op is 0.228us (4.4 Mqps) with batch size of 0
With 100000000 items and hash table ratio 0.750000, number of hash functions used: 3.
Time taken per op is 0.185us (5.4 Mqps) with batch size of 10
With 100000000 items and hash table ratio 0.750000, number of hash functions used: 3.
Time taken per op is 0.186us (5.4 Mqps) with batch size of 25
With 100000000 items and hash table ratio 0.750000, number of hash functions used: 3.
Time taken per op is 0.189us (5.3 Mqps) with batch size of 50
With 100000000 items and hash table ratio 0.750000, number of hash functions used: 3.
Time taken per op is 0.188us (5.3 Mqps) with batch size of 100

With 100000000 items and hash table ratio 0.900000, number of hash functions used: 3.
Time taken per op is 0.325us (3.1 Mqps) with batch size of 0
With 100000000 items and hash table ratio 0.900000, number of hash functions used: 3.
Time taken per op is 0.196us (5.1 Mqps) with batch size of 10
With 100000000 items and hash table ratio 0.900000, number of hash functions used: 3.
Time taken per op is 0.199us (5.0 Mqps) with batch size of 25
With 100000000 items and hash table ratio 0.900000, number of hash functions used: 3.
Time taken per op is 0.196us (5.1 Mqps) with batch size of 50
With 100000000 items and hash table ratio 0.900000, number of hash functions used: 3.
Time taken per op is 0.209us (4.8 Mqps) with batch size of 100

Reviewers: sdong, yhchiang, igor, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22167
2014-08-20 18:35:35 -07:00
Yueh-Hsuan Chiang
63a2215c63 Improve Options sanitization and add MmapReadRequired() to TableFactory
Summary:
Currently, PlainTable must use mmap_reads.  When PlainTable is used but
allow_mmap_reads is not set, rocksdb will fail in flush.

This diff improve Options sanitization and add MmapReadRequired() to
TableFactory.

Test Plan:
export ROCKSDB_TESTS=PlainTableOptionsSanitizeTest
make db_test -j32
./db_test

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: you, leveldb

Differential Revision: https://reviews.facebook.net/D21939
2014-08-20 15:53:39 -07:00
sdong
045575ad0c Add CuckooHash table format to table_reader_bench
Summary: Make table_reader_bench cover all the three table formats.

Test Plan: Run it using three options

Reviewers: radheshyamb, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D22137
2014-08-19 14:58:15 -07:00
Yueh-Hsuan Chiang
570ba5aca8 Avoid retrying to read property block from a table when it does not exist.
Summary:
Avoid retrying to read property block from a table when it does not exist
in updating stats for compensating deletion entries.

In addition, ReadTableProperties() now returns Status::NotFound instead
of Status::Corruption when table properties does not exist in the file.

Test Plan:
make db_test -j32
export ROCKSDB_TESTS=CompactionDeleteionTrigger
./db_test

Reviewers: ljin, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21867
2014-08-15 12:17:44 -07:00
Radheshyam Balasundaram
9674c11d01 Integrating Cuckoo Hash SST Table format into RocksDB
Summary:
Contains the following changes:
- Implementation of cuckoo_table_factory
- Adding cuckoo table into AdaptiveTableFactory
- Adding cuckoo_table_db_test, similar to lines of plain_table_db_test
- Minor fixes to Reader: When a key is found in the table, return the key found instead of the search key.
- Minor fixes to Builder: Add table properties that are required by Version::UpdateTemporaryStats() during Get operation. Don't define curr_node as a reference variable as the memory locations may get reassigned during tree.push_back operation, leading to invalid memory access.

Test Plan:
cuckoo_table_reader_test --enable_perf
cuckoo_table_builder_test
cuckoo_table_db_test
make check all
make valgrind_check
make asan_check

Reviewers: sdong, igor, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21219
2014-08-11 20:21:07 -07:00
miguelportilla
93e6b5e9d9 Changes to support unity build:
* Script for building the unity.cc file via Makefile
* Unity executable Makefile target for testing builds
* Source code changes to fix compilation of unity build
2014-08-11 13:22:47 -04:00
ZHANG Biao
63d5cc72fa fix various 'comparison of integers of different signs' compiling errors under macosx 2014-08-07 17:06:07 +08:00
sdong
1242bfcad7 Add DB property "rocksdb.estimate-table-readers-mem"
Summary:
Add a DB Property "rocksdb.estimate-table-readers-mem" to return estimated memory usage by all loaded table readers, other than allocated from block cache.

Refactor the property codes to allow getting property from a version, with DB mutex not acquired.

Test Plan: Add several checks of this new property in existing codes for various cases.

Reviewers: yhchiang, ljin

Reviewed By: ljin

Subscribers: xjin, igor, leveldb

Differential Revision: https://reviews.facebook.net/D20733
2014-08-06 11:39:46 -07:00
Radheshyam Balasundaram
606a126703 Changing implementaiton of CuckooTableBuilder to not take file_size, key_length, value_length.
Summary:
 - Maintain a list of key-value pairs as vectors during Add operation.
 - Start building hash table only when Finish() is called.
 - This approach takes more time and space but avoids taking file_size, key and value lengths.
 - Rewrote cuckoo_table_builder_test

I did not know about IterKey while writing this diff. I shall change places where IterKey could be used instead of std::string tomorrow. Please review rest of the logic.

Test Plan:
cuckoo_table_reader_test --enable_perf
cuckoo_table_builder_test
valgrind_check
asan_check

Reviewers: sdong, igor, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20907
2014-08-05 20:55:46 -07:00
Radheshyam Balasundaram
2124c85cc6 Implementing CuckooTableReader::NewIterator
Summary:
- Reads key-value pairs from file and builds an in-memory index of key-to-bucket id map in sorted order of key.
- Assumes bytewise comparator for sorting keys.
- Test changes

Test Plan:
cuckoo_table_reader_test --enable_perf
valgrind_check
asan_check

Reviewers: yhchiang, sdong, ljin

Reviewed By: ljin

Subscribers: leveldb, igor

Differential Revision: https://reviews.facebook.net/D20721
2014-08-05 16:35:02 -07:00
sdong
02c4023666 Remove port::MemoryBarrier() from table_reader_bench
Summary: port::MemoryBarrier() is not recommended to use outside of port. Remove it.

Test Plan: run table_reader_bench

Reviewers: ljin, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21075
2014-08-05 11:33:56 -07:00
Feng Zhu
1129921e9b logging_when_create_and_delete_manifest
Summary:
  1. logging when create and delete manifest file
  2. fix formating in table/format.cc

Test Plan:
  make all check
  run db_bench, track the LOG file.

Reviewers: ljin, yhchiang, igor, yufei.zhu, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21009
2014-08-04 11:25:42 -07:00
Radheshyam Balasundaram
0c9d03ba10 Fixing broken Mac build
Summary: Made some small changes to fix the broken mac build

Test Plan: make check all in both linux and mac. All tests pass.

Reviewers: sdong, igor, ljin, yhchiang

Reviewed By: ljin, yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20895
2014-07-31 20:52:13 -07:00
Feng Zhu
b0999011e2 use stack instead of heap memory in ReadBlockContents in some case
Summary:
  When compression is enabled, and blocksize is not too big, use the
  space in stack to hold bytes read from block.

Bencmark:
base version: commit 8f09d53fd1
  malloc: 1.30% -> 0.98%
  free: 1.49% -> 1.07%

Test Plan:
  make all check

Reviewers: ljin, yhchiang, dhruba, igor, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20679
2014-07-30 23:11:59 -07:00
Feng Zhu
8f09d53fd1 remove malloc when create data and index iterator in Get
Summary:
  Define Block::Iter to be an independent class to be used by block_based_table_reader
  When creating data and index iterator, update an existing iterator rather than new one
  Thus malloc and free could be reduced

Benchmark,
Base:
commit 76286ee67e
commands:
--db=/dev/shm/rocksdb --num_levels=6 --key_size=20 --prefix_size=20 --keys_per_prefix=0 --value_size=100 --write_buffer_size=134217728 --max_write_buffer_number=2 --target_file_size_base=33554432 --max_bytes_for_level_base=1073741824 --verify_checksum=false --max_background_compactions=4 --use_plain_table=0 --memtablerep=prefix_hash --open_files=-1 --mmap_read=1 --mmap_write=0 --bloom_bits=10 --bloom_locality=1 --memtable_bloom_bits=500000 --compression_type=lz4 --num=2621440 --use_hash_search=1 --block_size=1024 --block_restart_interval=1 --use_existing_db=1 --threads=1 --benchmarks=readrandom —disable_auto_compactions=1

malloc: 3.30% -> 1.42%
free: 3.59%->1.61%

Test Plan:
  make all check
  run db_stress
  valgrind ./db_test ./table_test

Reviewers: ljin, yhchiang, dhruba, igor, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20655
2014-07-30 16:34:35 -07:00
Radheshyam Balasundaram
91c01485d1 Minor changes to CuckooTableBuilder
Summary:
- Copy the key and value to in-memory hash table during Add operation. Also modified cuckoo_table_reader_test to use this.
- Store only the user_key in in-memory hash table if it is last level file.
- Handle Carryover while chosing unused key in Finish() method in case unused key was never found before Finish() call.

Test Plan:
cuckoo_table_reader_test --enable_perf
cuckoo_table_builder_test
valgrind_check
asan_check

Reviewers: sdong, yhchiang, igor, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20715
2014-07-28 17:14:25 -07:00
Lei Jin
40fa8a4cd5 make statistics forward-able
Summary:
Make StatisticsImpl being able to forward stats to provided statistics
implementation. The main purpose is to allow us to collect internal
stats in the future even when user supplies custom statistics
implementation. It avoids intrumenting 2 sets of stats collection code.
One immediate use case is tuning advisor, which needs to collect some
internal stats, users may not be interested.

Test Plan:
ran db_bench and see stats show up at the end of run
Will run make all check since some tests rely on statistics

Reviewers: yhchiang, sdong, igor

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D20145
2014-07-28 12:05:36 -07:00
sdong
4a8f0c957c Block::Iter::PrefixSeek() to have an extra check to filter out some false matches
Summary:
In block based table's hash index checking, when looking for a key that doesn't exist, there is a high chance that a false block is returned because of hash bucket conflicts. In this revision, another check is done to filter out some of those cases: comparing previous key of the block boundary to see whether the target block is what we are looking for.

In a favored test setting (bloom filter disabled, 8 L0 files), I saw about 80% improvements. In a non-favored test setting (bloom filter enabled, files are all in L1, files are all cached), I see the performance penalty is less than 3%.

Test Plan: make all check

Reviewers: haobo, ljin

Reviewed By: ljin

Subscribers: wuj, leveldb, zagfox, yhchiang

Differential Revision: https://reviews.facebook.net/D20595
2014-07-25 17:27:57 -07:00
Radheshyam Balasundaram
62f9b071ff Implementation of CuckooTableReader
Summary:
Contains:
- Implementation of TableReader based on Cuckoo Hashing
- Unittests for CuckooTableReader
- Performance test for TableReader

Test Plan:
make cuckoo_table_reader_test
./cuckoo_table_reader_test
make valgrind_check
make asan_check

Reviewers: yhchiang, sdong, igor, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20511
2014-07-25 16:37:32 -07:00
Radheshyam Balasundaram
07a7d870b8 Addressing TODOs in CuckooTableBuilder
Summary:
Contains the following changes in CuckooTableBuilder:
- Take an extra parameter in constructor to identify last level file.
- Implement a better way to identify if a bucket has been inserted into the tree already during BFS search.
- Minor typos

Test Plan:
make cuckoo_table_builder
./cuckoo_table_builder
make valgrind_check

Reviewers: sdong, igor, yhchiang, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20445
2014-07-24 10:07:41 -07:00
Feng Zhu
da9274574f Use IterKey instead of string in Block::Iter to reduce malloc
Summary:
  Modify a functioin TrimAppend in dbformat.h: IterKey. Write a test for it in dbformat_test
  Use IterKey in block::Iter to replace std::string to reduce malloc.

  Evaluate it using perf record.
  malloc: 4.26% -> 2.91%
  free: 3.61% -> 3.08%

Test Plan:
  make all check
  ./valgrind db_test dbformat_test

Reviewers: ljin, haobo, yhchiang, dhruba, igor, sdong

Reviewed By: sdong

Differential Revision: https://reviews.facebook.net/D20433
2014-07-23 12:31:11 -07:00
Igor Canadi
2d3d63597a Fix signed-unsigned compare error 2014-07-22 15:35:07 -04:00
Radheshyam Balasundaram
f6272e3055 Fixing memory leaks in cuckoo_table_builder_test
Summary: Fixes some memory leaks in cuckoo_builder_test.cc. This also fixed broken valgrind_check tests

Test Plan:
make valgrind_check
./cuckoo_builder_test
Currently running make check all. I shall update once it is done.

Reviewers: ljin, sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20385
2014-07-22 09:49:04 -07:00
Yueh-Hsuan Chiang
bbe2e91d00 Fixed a compile error of cuckoo_table_builder.
Summary:
Fixed the following compile error.

./table/cuckoo_table_builder.h:72:22: error: private field 'key_length_' is not used [-Werror,-Wunused-private-field]
  const unsigned int key_length_;
                     ^
1 error generated.

Test Plan: make

Reviewers: sdong, ljin, radheshyamb, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20349
2014-07-21 15:17:09 -07:00
Radheshyam Balasundaram
cf3da899b0 Adding a new SST table builder based on Cuckoo Hashing
Summary:
Cuckoo Hashing based SST table builder. Contains:
- Cuckoo Hashing logic and file storage logic.
- Unit tests for logic

Test Plan:
make cuckoo_table_builder_test
./cuckoo_table_builder_test
make check all

Reviewers: yhchiang, igor, sdong, ljin

Reviewed By: ljin

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D19545
2014-07-21 13:26:09 -07:00
Stanislau Hlebik
c1a90b0848 Fix db_bench
Summary: Adding check for zero size index

Test Plan: ./build_tools/regression_build_test.sh

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20259
2014-07-21 10:31:33 -07:00
Chilledheart
54f4e2f188 Fix clang compiler warnings 2014-07-20 22:57:20 +08:00
Stanislau Hlebik
9d70cce047 Adding option to save PlainTable index and bloom filter in SST file.
Summary:
Adding option to save PlainTable index and bloom filter in SST file.
If there is no bloom block and/or index block, PlainTableReader builds
new ones. Otherwise PlainTableReader just use these blocks.

Test Plan: make all check

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19527
2014-07-18 16:58:13 -07:00
Stanislau Hlebik
92d73cbe78 Add PlainTableOptions
Summary:
Since we have a lot of options for PlainTable, add a struct PlainTableOptions
to manage them

Test Plan: make all check

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20175
2014-07-18 00:08:38 -07:00
Igor Canadi
1614284eff Fix compressed cache 2014-07-16 06:45:49 -07:00
Stanislau Hlebik
30c81e7717 Removing NewTotalOrderPlainTableFactory
Summary:
Seems like NewTotalOrderPlainTableFactory is useless and is semantically incorrect.
Total order mode indicator is prefix_extractor == nullptr,
but NewTotalOrderPlainTableFactory doesn't set it to be nullptr. That's why some tests
in plain_table_db_tests is incorrect.

Test Plan: make all check

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19587
2014-07-10 11:32:04 -07:00
Lei Jin
8d9a46fcd1 initialize decoded_internal_key_valid
Summary:
ReadInternalKey() will assign correct value anyway. Initialize it to
true to suppress compiler error reported
https://github.com/facebook/rocksdb/issues/186

Test Plan: I cannot reproduce it but this is obvious

Reviewers: sdong, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19467
2014-07-03 23:13:08 -07:00
Feng Zhu
5656367416 use arena to allocate memtable's bloomfilter and hashskiplist's buckets_
Summary:
    Bloomfilter and hashskiplist's buckets_ allocated by memtable's arena
    DynamicBloom: pass arena via constructor, allocate space in SetTotalBits
    HashSkipListRep: allocate space of buckets_ using arena.
       do not delete it in deconstructor because arena would take care of it.
    Several test files are changed.

Test Plan:
    make all check

Reviewers: ljin, haobo, yhchiang, sdong

Reviewed By: sdong

Subscribers: igor, dhruba

Differential Revision: https://reviews.facebook.net/D19335
2014-06-30 15:54:31 -07:00
Igor Canadi
9fe87b17aa Fix compile 2014-06-20 10:36:48 +02:00
Igor Canadi
d4a8423334 Remove seek compaction
Summary:
As discussed in our internal group, we don't get much use of seek compaction at the moment, while it's making code more complicated and slower in some cases.

This diff removes seek compaction and (hopefully) all code that was introduced to support seek compaction.

There is one test case that relied on didIO information. I'll try to find another way to implement it.

Test Plan: make check

Reviewers: sdong, haobo, yhchiang, ljin, dhruba

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19161
2014-06-20 10:23:02 +02:00
Haobo Xu
7a9dd5f214 [RocksDB] Make block based table hash index more adaptive
Summary: Currently, RocksDB returns error if a db written with prefix hash index, is later opened without providing a prefix extractor. This is uncessarily harsh. Without a prefix extractor, we could always fallback to the normal binary index.

Test Plan: unit test, also manually veried LOG that fallback did occur.

Reviewers: sdong, ljin

Reviewed By: ljin

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19191
2014-06-19 16:40:32 -07:00
Lei Jin
1ec2d1c69d fix make shared_lib compilation error
Summary: s/class ParsedInternalKey/struct ParsedInternalKey

Test Plan: make shared_lib

Reviewers: igor, yhchiang, sdong, haobo

Reviewed By: haobo

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19173
2014-06-19 10:12:26 -07:00
Haobo Xu
167738256f [RocksDB] Fix unit test
Summary: fix a bug in D19047, which caused  DBTest.RecoverDuringMemtableCompaction to fail.

Test Plan: unit test

Reviewers: sdong, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19155
2014-06-19 01:37:21 -07:00