Commit Graph

2183 Commits

Author SHA1 Message Date
Sage Weil
5830c699f2 log_writer: pass log number and whether recycling is enabled to ctor
When we recycle log files, we need to mix the log number into the CRC
for each record.  Note that for logs that don't get recycled (like the
manifest), we always pass a log_number of 0 and false.

Signed-off-by: Sage Weil <sage@redhat.com>
2015-10-18 21:24:32 -04:00
Sage Weil
666376150c db_impl: recycle log files
If log recycling is enabled, put old WAL files on a recycle queue instead of
deleting them.  When we need a new log file, take a recycled file off the
list if one is available.

Signed-off-by: Sage Weil <sage@redhat.com>
2015-10-18 21:24:32 -04:00
Sage Weil
d666225a0a db_impl: disable recycle_log_files if WAL archive is enabled
We can't recycle the files if they are being archived.

Signed-off-by: Sage Weil <sage@redhat.com>
2015-10-18 21:21:24 -04:00
Sage Weil
543c12ab06 options: add recycle_log_file_num option
Signed-off-by: Sage Weil <sage@redhat.com>
2015-10-18 21:21:24 -04:00
Alexey Maykov
e1a09a7703 Implementation for GetPropertiesOfTablesInRange
Summary: In MyRocks, it is sometimes important to get propeties only for the subset of the database. This diff implements the API in RocksDB.

Test Plan: ran the GetPropertiesOfTablesInRange

Reviewers: rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48651
2015-10-17 13:34:43 -07:00
Yueh-Hsuan Chiang
ad471453e8 Allow GetProperty to report the number of currently running flushes / compactions.
Summary:
Add rocksdb.num-running-compactions and rocksdb.num-running-flushes
to GetIntProperty() that reports the number of currently running
compactions / flushes.

Test Plan: augmented existing tests in db_test

Reviewers: igor, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48693
2015-10-17 00:16:36 -07:00
sdong
277dea78f0 Add more kill points
Summary:
Add kill points in:
1. after creating a file
2. before writing a manifest record
3. before syncing manifest
4. before creating a new current file
5. after creating a new current file

Test Plan: Run all current tests.

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

Reviewed By: kradhakrishnan

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48855
2015-10-16 14:35:12 -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
Islam AbdelRahman
952ad994a9 Fix db_test under ROCKSDB_LITE
Summary:
This diff exclude alot of tests in db_test that are not compiling / failing under ROCKSD_LITE

Test Plan:
OPT=-DROCKSDB_LITE make check -j64
make check -j64

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48771
2015-10-15 10:59:31 -07:00
Islam AbdelRahman
6d730b4ae7 Block tests under ROCKSDB_LITE
Summary:
This patch will block all tests (not including db_test) that don't compile / fail under ROCKSDB_LITE

Test Plan:
OPT=-DROCKSDB_LITE make db_compaction_filter_test -j64 &&
OPT=-DROCKSDB_LITE make db_compaction_test -j64 &&
OPT=-DROCKSDB_LITE make db_dynamic_level_test -j64 &&
OPT=-DROCKSDB_LITE make db_log_iter_test -j64 &&
OPT=-DROCKSDB_LITE make db_tailing_iter_test -j64 &&
OPT=-DROCKSDB_LITE make db_universal_compaction_test -j64 &&
OPT=-DROCKSDB_LITE make ldb_cmd_test -j64

make clean

make db_compaction_filter_test -j64 &&
make db_compaction_test -j64 &&
make db_dynamic_level_test -j64 &&
make db_log_iter_test -j64 &&
make db_tailing_iter_test -j64 &&
make db_universal_compaction_test -j64 &&
make ldb_cmd_test -j64

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48723
2015-10-15 10:51:00 -07:00
sdong
dae49e829e Make DBTest.ReadLatencyHistogramByLevel more robust
Summary:
Two fixes:
1. Wait compaction after generating each L0 file so that we are sure there are one L0 file left.
2. https://reviews.facebook.net/D48423 increased from 500 keys to 700 keys but in verification phase we are still querying the first 500 keys. It is a bug to fix.

Test Plan: Run the test in the same environment that fails by chance of one in tens of times. It doesn't fail after 1000 times.

Reviewers: yhchiang, IslamAbdelRahman, igor, rven, kradhakrishnan

Reviewed By: rven, kradhakrishnan

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48759
2015-10-14 16:08:55 -07:00
Islam AbdelRahman
b81b2ec25d Fix benchmarks under ROCKSDB_LITE
Summary: Fix db_bench and memtablerep_bench under ROCKSDB_LITE

Test Plan:
OPT=-DROCKSDB_LITE make db_bench -j64
OPT=-DROCKSDB_LITE make memtablerep_bench -j64
make db_bench -j64
make memtablerep_bench -j64

Reviewers: yhchiang, anthony, rven, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48717
2015-10-14 12:43:00 -07:00
Venkatesh Radhakrishnan
e587dbe03a Move manual_compaction_test.cc from util to db
Summary: manual_compaction_test.cc incorrectly in util. Moved to db.

Test Plan: make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48687
2015-10-14 11:06:27 -07:00
Islam AbdelRahman
f55d3009c0 Make db_test_util compile under ROCKSDB_LITE
Summary: db_test_util is used in multiple test files but it dont compile under ROCKSDB_LITE

Test Plan:
make check
make static_lib
OPT=-DROCKSDB_LITE make db_wal_test

Reviewers: igor, yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48579
2015-10-13 17:33:23 -07:00
Yueh-Hsuan Chiang
2b925ccb43 Correct the comments in db/internal_stats.h
Summary: Correct the comments in db/internal_stats.h

Test Plan: no code change

Reviewers: igor, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48675
2015-10-13 17:23:40 -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
Praveen Rao
cc4d13e0a8 Put wal_filter under #ifndef ROCKSDB_LITE 2015-10-13 11:10:14 -07:00
Yueh-Hsuan Chiang
7062d0ea68 Make perf_context.db_mutex_lock_nanos and db_condition_wait_nanos only measures DB Mutex
Summary:
In the current implementation, perf_context.db_mutex_lock_nanos and
perf_context.db_condition_wait_nanos also include the mutex-wait time
other than DB Mutex.

This patch fix this issue by incrementing the counters only when it detects
a DB mutex.

Test Plan: perf_context_test

Reviewers: anthony, IslamAbdelRahman, sdong, igor

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48555
2015-10-13 10:41:48 -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
Praveen Rao
a6efefef79 Fix format specifiers 2015-10-12 19:20:09 -07:00
Praveen Rao
f7b2a7b40b Fix format specifiers 2015-10-12 18:55:46 -07:00
Islam AbdelRahman
7f58ff7c31 Remove db_impl_debug from release build
Summary:
Remove db_impl_debug from NDEBUG, but allow it in ROCKSDB_LITE
These functions by definition should not be included in NDEBUG and they are only used for testing
This is based on offline discussion with @yhchiang and @igor

Test Plan:
make static_lib
make check

Reviewers: igor, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: igor, yhchiang, dhruba

Differential Revision: https://reviews.facebook.net/D48573
2015-10-12 17:35:43 -07:00
Praveen Rao
eb24178553 merge from master 2015-10-12 17:24:21 -07:00
Islam AbdelRahman
c64ae05b1c Move TEST_NewInternalIterator to NewInternalIterator
Summary:
Long time ago we add InternalDumpCommand to ldb_tool https://reviews.facebook.net/D11517
This command is using TEST_NewInternalIterator although it's not a test. This patch move TEST_NewInternalIterator outside of db_impl_debug.cc

Test Plan:
make check
make static_lib

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48561
2015-10-12 17:22:37 -07:00
Praveen Rao
59a0c219bb Adding log filter to inspect and filter log records on recovery 2015-10-12 17:03:03 -07:00
Venkatesh Radhakrishnan
f1fdf5205b Clean up dependency: Move db_test_util.* to db directory
Summary:
As part of tech debt week, we are cleaning up dependencies.
This diff moves db_test_util.[h,cc] from util to db directory.

Test Plan: make check

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48543
2015-10-12 13:05:42 -07:00
Alexey Maykov
fa4b5b3db8 Fix for the travis build caused by my previous commit
Summary: My previous commit ('Passing table properties to compaction callback') broke the clang build. Here is the fix.

Test Plan: USE_CLANG=1 make all -j

Reviewers: igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48489
2015-10-09 19:37:51 -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
sdong
e61d9c1484 Make DBTest.AggregatedTableProperties more deterministic
Summary: Now based on environment, DBTest.AggregatedTableProperties has a possibility of issuing a L0->L1 compaction after reopening and the results are not what we expected. We tune the L0 compaction trigger to make it less likely to happen.

Test Plan: I can't repro the failure but I think the change is better. Just run the test and make sure it passes.

Reviewers: kradhakrishnan, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48423
2015-10-09 09:47:56 -07:00
sdong
b77eb16aba New Manifest format to allow customized fields in NewFile.
Summary: With this commit, we add a new format in manifest when adding a new file. Now path ID and need-compaction hint are first two customized fields.

Test Plan: Add a test case in version_edit_test to verify the encoding and decoding logic. Add a unit test in db_test to verify need compaction is persistent after DB restarting.

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

Reviewed By: igor

Subscribers: javigon, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48123
2015-10-08 15:51:45 -07:00
sdong
000836a880 CompactionFilter::Context to contain column family ID
Summary: Add the column family ID to compaction filter context, so it is easier for compaction filter to apply different logic for different column families.

Test Plan: Add a unit test to verify the column family ID passed is correct.

Reviewers: rven, yhchiang, igor

Reviewed By: igor

Subscribers: yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D48357
2015-10-08 11:27:38 -07:00
Igor Canadi
9803e0d813 compaction_filter.h cleanup
Summary:
Two changes:
1. remove *V2 filter stuff. we deprecated that a while ago
2. clarify what happens when user sets max_subcompactions to bigger than 1

Test Plan: none

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47871
2015-10-08 09:32:50 -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
77e4ad7ce2 Fix compile failure on Travis
Summary:
Travis is complaining against using {} to initialize KVMap: https://travis-ci.org/facebook/rocksdb/jobs/84132600

      db/compaction_job_test.cc:526:26: error: chosen constructor is explicit in copy-initialization
        RunCompaction({files}, {});

This diff should fix it

Test Plan: travis

Reviewers: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48309
2015-10-07 10:17:47 -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
dyniusz
0267502655 Support for LevelDB SST with .ldb suffix
Summary:
	Handle SST files with both ".sst" and ".ldb" suffix.
	This enables user to migrate from leveldb to rocksdb.

Test Plan:
        Added unit test with DB operating on SSTs with names schema.
        See db/dc_test.cc:SSTsWithLdbSuffixHandling for details

Reviewers: yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48003
2015-10-06 17:46:22 -07:00
Igor Canadi
eb5b637fb0 Fix condition for bottommost level
Summary:
The function GetBoundaryKeys() returns the smallest key from the first file and largest key from the last file. This is good for any level >0, but it's not correct for level 0. In level 0, files can overlap, so we need to check all files for boundary keys. This bug can cause wrong value for bottommost_level in compaction (value of true, although correct is false), which means we can set sequence numbers to 0 even if the key is not the oldest one in the database.

Herman reported corruption while testing MyRocks. Fortunately, the patch that added the bug was not released yet.

Test Plan: added a new test to compaction_picker_test.

Reviewers: hermanlee4, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48201
2015-10-05 17:40:18 -07:00
Igor Canadi
9eaff629e3 Make corruption_test more robust
Summary:
Latest travis failed because of corruption test TableFileIndexData: https://travis-ci.org/facebook/rocksdb/jobs/83732558

This diff makes the test more explicit:
1. create two files
2. corrupt the second's file index
3. expect to get only 5000 keys when range scanning

Test Plan: the test is still passing :)

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

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48183
2015-10-05 14:46:28 -07:00
Igor Canadi
bf19dbff44 Fix valgrind - Initialize done variable
Summary: Fixes the valgrind warning "Conditional jump or move depends on uninitialised value(s)"

Test Plan: valgrind test, no more warning

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D48177
2015-10-05 10:10:11 -07:00
Igor Canadi
115427ef63 Add APIs PauseBackgroundWork() and ContinueBackgroundWork()
Summary:
To support a new MongoDB capability, we need to make sure that we don't do any IO for a short period of time. For background, see:
* https://jira.mongodb.org/browse/SERVER-20704
* https://jira.mongodb.org/browse/SERVER-18899

To implement that, I add a new API calls PauseBackgroundWork() and ContinueBackgroundWork() which reuse the capability we already have in place for RefitLevel() function.

Test Plan: Added a new test in db_test. Made sure that test fails when PauseBackgroundWork() is commented out.

Reviewers: IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47901
2015-10-02 13:17:34 -07:00
Islam AbdelRahman
c29af48d3e Add max_file_opening_threads to db_bench
Summary: Add an option to db_bench for max_file_opening_threads

Test Plan: compile and run db_bench

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, paultuckfield

Differential Revision: https://reviews.facebook.net/D47811
2015-09-30 09:51:31 -07:00
Yueh-Hsuan Chiang
30f74fa964 Make CompactionJobStatsTest.UniversalCompactionTest more robust
Summary:
CompactionJobStatsTest.UniversalCompactionTest assumes compaction
kicks in when the number of L0 files equals to the compaction trigger.
However, in some case, the compaction might not catch up the write
speed and thus compaction might not kick in until the number of L0 files
is GREATER than the compaction trigger.

This patch tries to fix this corner case by making the Put thread wait
for a potential compaction whenever it flushes.

Test Plan: ./compaction_job_stats_test

Reviewers: sdong, anthony, IslamAbdelRahman, igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D47589
2015-09-28 13:55:53 -07:00
Mike Lin
60fa9cf0b5 Override DBImplReadOnly::SyncWAL() to return NotSupported. Previously, calling it caused program abort. 2015-09-25 21:25:30 -07:00
Yueh-Hsuan Chiang
63e0f86797 Fixed a bug which causes rocksdb.flush.write.bytes stat is always zero
Summary: Fixed a bug which causes rocksdb.flush.write.bytes stat is always zero

Test Plan: augment existing db_test

Reviewers: sdong, anthony, IslamAbdelRahman, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47595
2015-09-25 13:34:49 -07:00
Yueh-Hsuan Chiang
b6aa3f962d Fixed a memory leak issue in DBTest.UnremovableSingleDelete
Summary: Fixed a memory leak issue in DBTest.UnremovableSingleDelete

Test Plan: valgrind --error-exitcode=2 --leak-check=full ./db_test --gtest_filter="*UnremovableSingleDelete*"

Reviewers: sdong, anthony, IslamAbdelRahman, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47583
2015-09-25 12:07:32 -07:00
Igor Canadi
7b7b5d9f18 [minor] Reuse SleepingBackgroundTask
Summary: As title

Test Plan: make check

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46983
2015-09-25 10:29:44 -07:00
Mayank Pundir
c58bac701c Fix valgrind failure due to memory leaks
Summary: Test cases for IsBottommostLevel function create FileMetaData objects which were not getting deleted in the destructor.

Test Plan: Valgrind check on compaction_picker_test

Reviewers: yhchiang, igor, sdong

Subscribers: rven, kradhakrishnan, IslamAbdelRahman, dhruba, anthony

Differential Revision: https://reviews.facebook.net/D47463
2015-09-23 17:41:42 -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
Yueh-Hsuan Chiang
3fdb6e5234 Fixed old lint errors in db/filename.cc
Summary: Fixed old lint errors in db/filename.cc

Test Plan: make

Reviewers: igor, sdong, anthony, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47445
2015-09-23 12:39:16 -07:00
Yueh-Hsuan Chiang
b349d22786 Fixed old lint errors in db/filename.h
Summary: Fixed old lint errors in db/filename.h

Test Plan: make

Reviewers: igor, sdong, anthony, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47439
2015-09-23 12:22:44 -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
d0c31641d2 Internal stats WAL file synced to match meaning of the stats of the same name
Summary: https://reviews.facebook.net/D23343 changed WAL sync bytes to extra fsync. This change does the same for internal stats.

Test Plan: Run all existing unit tests and verify results in db_bench.

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

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D47349
2015-09-22 14:23:11 -07:00
Siying Dong
48b4497f75 Merge pull request #730 from yuslepukhin/fix_write_batch_win_const_expr
Fix Windows constexpr issue and '#ifdef' column_family_test in Release.
2015-09-22 11:08:10 -07:00
sdong
f1b9f804e9 Add a mode to always pick the oldest file to compact for each level
Summary:
Add options.compaction_pri, which specifies the policy about which file to compact first.
kCompactionPriByLargestSeq will compact oldest files first.
Verified the behavior in db_bench but did not write unit tests yet. Also need to make it settable through option string and dynamically changeable.

Test Plan: Will write unit tests

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

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45951
2015-09-21 17:21:59 -07:00
Dmitri Smirnov
2754ec9994 Fix Windows constexpr issue and '#ifdef' column_family_test in Release. 2015-09-21 16:21:01 -07:00
jsteemann
5ec129971b key_ cannot become nullptr, so no check is needed for that
(ignoring the unlikely case that some overrides
`operator new throw(std::bad_alloc)` with a function that returns a nullptr)
2015-09-18 20:15:20 +02:00
jsteemann
834b12a8d5 made Size() function const because it does not modify data 2015-09-18 20:10:00 +02:00
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
Venkatesh Radhakrishnan
51e1c11254 Do not flag error if file to be deleted does not exist
Summary:
Some users have observed errors in the log file when
the log file or sst file is already deleted.

Test Plan:
Make sure that the errors do not appear for already deleted
files.

Reviewers: sdong

Reviewed By: sdong

Subscribers: anthony, kradhakrishnan, yhchiang, rven, igor, IslamAbdelRahman, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47115
2015-09-17 10:21:34 -07:00
Mayank Pundir
a5e312a7a4 Improving condition for bottommost level during compaction
Summary: The diff modifies the condition checked to determine the bottommost level during compaction. Previously, absence of files in higher levels alone was used as the condition. Now, the function additionally evaluates if the higher levels have files which have non-overlapping key ranges, then the level can be safely considered as the bottommost level.

Test Plan: Unit test cases added and passing. However, unit tests of universal compaction are failing as a result of the changes made in this diff. Need to understand why that is happening.

Reviewers: igor

Subscribers: dhruba, sdong, lgalanis, meyering

Differential Revision: https://reviews.facebook.net/D46473
2015-09-16 17:47:50 -07:00
sdong
9aca7cd6d8 DB::Open() to flush info log after printing DB pointer
Summary: Now DB::Open() flushes info log before printing DB pointer, so it may not show up if no activity after DB open. Move log flushing from after printing options to printing DB pointer.

Test Plan: make commit-prereq

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

Reviewed By: rven

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D47121
2015-09-16 16:33:39 -07:00
Yueh-Hsuan Chiang
f21c7415a7 Change the log level of DB start-up log from Warn to Header.
Summary: Change the log level of DB start-up log from Warn to Header.

Test Plan: db_bench and observe the LOG header

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47067
2015-09-16 11:31:45 -07:00
Alexey Maykov
3ebf11ed16 Adding the increment for a counter for a number of WAL syncs
Summary: This will unblock the corresponding change in MyRocks

Test Plan: ran rocksdb.write_sync test

Reviewers: sdong, kolmike

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46911
2015-09-16 11:00:49 -07:00
Igor Canadi
1b7ea8ce81 Skipped tests shouldn't be failures
Summary: If we skip a test, we shouldn't mark `make check` as failure. This fixes travis CI test.

Test Plan: Travis CI

Reviewers: noetzli, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D47031
2015-09-15 18:10:36 -07:00
Ari Ekmekji
5ba3297d0d Add compaction time to log output
Summary:
Although compaction time is recorded in the statistics,
it is helpful to include this value in the log output corresponding
to the end of compaction.

Test Plan: make all && make check

Reviewers: yhchiang, sdong, igor, noetzli, MarkCallaghan

Reviewed By: MarkCallaghan

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D47007
2015-09-15 17:11:44 -07:00
Igor Canadi
0e50a3fcc0 Merge issue with D46773
Summary: There was a merge issue with SleepingBackgroundTask

Test Plan: compiles now

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46977
2015-09-15 11:35:23 -07:00
Igor Canadi
a7e80379b0 LogAndApply() should fail if the column family has been dropped
Summary:
This patch finally fixes the ColumnFamilyTest.ReadDroppedColumnFamily test. The test has been failing very sporadically and it was hard to repro. However, I managed to write a new tests that reproes the failure deterministically.

Here's what happens:
1. We start the flush for the column family
2. We check if the column family was dropped here: a3fc49bfdd/db/flush_job.cc (L149)
3. This check goes through, ends up in InstallMemtableFlushResults() and it goes into LogAndApply()
4. At about this time, we start dropping the column family. Dropping the column family process gets to LogAndApply() at about the same time as LogAndApply() from flush process
5. Drop column family goes through LogAndApply() first, marking the column family as dropped.
6. Flush process gets woken up and gets a chance to write to the MANIFEST. However, this is where it gets stuck: a3fc49bfdd/db/version_set.cc (L1975)
7. We see that the column family was dropped, so there is no need to write to the MANIFEST. We return OK.
8. Flush gets OK back from LogAndApply() and it deletes the memtable, thinking that the data is now safely persisted to sst file.

The fix is pretty simple. Instead of OK, we return ShutdownInProgress. This is not really true, but we have been using this status code to also mean "this operation was canceled because the column family has been dropped".

The fix is only one LOC. All other code is related to tests. I added a new test that reproes the failure. I also moved SleepingBackgroundTask to util/testutil.h (because I needed it in column_family_test for my new test). There's plenty of other places where we reimplement SleepingBackgroundTask, but I'll address that in a separate commit.

Test Plan:
1. new test
2. make check
3. Make sure the ColumnFamilyTest.ReadDroppedColumnFamily doesn't fail on Travis: https://travis-ci.org/facebook/rocksdb/jobs/79952386

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

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46773
2015-09-15 11:28:44 -07:00
Yoshinori Matsunobu
4886073174 Adding Slice::difference_offset() function
Summary:
There are some use cases in MyRocks to compare two slices
and to return the first byte where they differ. It may be
useful to add it as a RocksDB Slice function.

Test Plan: db_test

Reviewers: sdong, rven, igor

Reviewed By: igor

Subscribers: jkedgar, dhruba

Differential Revision: https://reviews.facebook.net/D46935
2015-09-15 10:32:42 -07:00
sdong
f3170b6f6c DBImpl::FindObsoleteFiles() shouldn't release mutex between getting min_pending_output and scanning files
Summary:
Releasing mutex between getting min_pending_output and scanning files may cause min_pending_output to be max but some non-final files are found in file scanning, ending up with deleting wrong files.
As a recent regression, mutex can be released while waiting for log sync. We move it to after file scanning.

Test Plan: Run all existing tests. Don't think it is easy to write a unit test. Maybe we should find a way to assert lock not released so that we can have some test verification for similar cases.

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

Reviewed By: rven

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D46899
2015-09-14 23:39:30 -07:00
Islam AbdelRahman
7cb314b9e6 Skip some tests in ROCKSD_LITE
Summary:
Skip these tests under ROCKSDB_LITE

compaction_job_stats_test
corruption_test
transactions/transaction_test

Test Plan: compile using ROCKSDB_LITE

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46923
2015-09-14 16:44:35 -07:00
sdong
5de807ac16 Add options.hard_pending_compaction_bytes_limit to stop writes if compaction lagging behind
Summary: Add an option to stop writes if compaction lefts behind. If estimated pending compaction bytes is more than threshold specified by options.hard_pending_compaction_bytes_liimt, writes will stop until compactions are cleared to under the threshold.

Test Plan: Add unit test DBTest.HardLimit

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

Reviewed By: igor

Subscribers: MarkCallaghan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45999
2015-09-14 12:51:16 -07:00
Siying Dong
592f6bf782 Merge pull request #716 from yuslepukhin/refactor_file_reader_writer_win
Refactor to support file_reader_writer on Windows.
2015-09-14 12:29:01 -07:00
Ari Ekmekji
03ddce9a01 Add counters for L0 stall while L0-L1 compaction is taking place
Summary:
Although there are currently counters to keep track of the
stall caused by having too many L0 files, there is no distinction as
to whether when that stall occurs either (A) L0-L1 compaction is taking
place to try and mitigate it, or (B) no L0-L1 compaction has been scheduled
at the moment. This diff adds a counter for (A) so that the nature of L0
stalls can be better understood.

Test Plan: make all && make check

Reviewers: sdong, igor, anthony, noetzli, yhchiang

Reviewed By: yhchiang

Subscribers: MarkCallaghan, dhruba

Differential Revision: https://reviews.facebook.net/D46749
2015-09-14 11:03:37 -07:00
Dmitri Smirnov
ddc8b44998 Address code review comments both GH and internal
Fix compilation issues on GCC/CLANG
 Address Windows Release test build issues due to Sync
2015-09-11 17:36:48 -07:00
Andres Noetzli
34cedaff66 Initialize variable to avoid warning
Summary:
RocksDB debug version failed to build under gcc-4.8.1 on sandcastle with the following error:

```
db/db_compaction_filter_test.cc:570:33: error: ‘snapshot’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
```

Test Plan: make db_compaction_filter_test && ./db_compaction_filter_test

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

Reviewed By: igor, sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46725
2015-09-11 12:07:54 -07:00
Manuel Ung
aeb4612685 Add counters for seek/next/prev
Summary:
There are currently no statistics on seeks, only on gets. This adds the following counters:

rocksdb.number.db.seek
rocksdb.number.db.next
rocksdb.number.db.prev
(number of calls)

rocksdb.db.iterate.bytes.read
(number of bytes read from key + value using seek/next/prev)

rocksdb.number.keys.seek.found
rocksdb.number.keys.next.found
rocksdb.number.keys.prev.found
(number of calls where seek/next/prev found a value)

Test Plan:
./db_bench -statistics -benchmarks fillrandom,seekrandom -seek_nexts 5
./db_bench -statistics -benchmarks fillrandom,seekrandom -seek_nexts 5 -reverse_iterator

Reviewers: yhchiang, rven, kradhakrishnan, IslamAbdelRahman, MarkCallaghan, sdong, igor

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46605
2015-09-11 11:37:44 -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
ddb950f83f Fixed bug in compaction iterator
Summary:
During the refactoring, the condition that makes sure that compaction
filters are only applied to records newer than the latest snapshot
got butchered. This patch fixes the condition and adds a test case.

Test Plan: make db_compaction_filter_test && ./db_compaction_filter_test

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

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46707
2015-09-11 10:13:49 -07:00
Dmitri Smirnov
30e82d5c41 Refactor to support file_reader_writer on Windows.
Summary. A change https://reviews.facebook.net/differential/diff/224721/
  Has attempted to move common functionality out of platform dependent
  code to a new facility called file_reader_writer.
  This includes:
  - perf counters
  - Buffering
  - RateLimiting

  However, the change did not attempt to refactor Windows code.
  To mitigate, we introduce new quering interfaces such as UseOSBuffer(),
  GetRequiredBufferAlignment() and ReaderWriterForward()
  for pure forwarding where required.
  Introduce WritableFile got a new method Truncate(). This is to communicate
  to the file as to how much data it has on close.
   - When space is pre-allocated on Linux it is filled with zeros implicitly,
    no such thing exist on Windows so we must truncate file on close.
   - When operating in unbuffered mode the last page is filled with zeros but we still want to truncate.

   Previously, Close() would take care of it but now buffer management is shifted to the wrappers and the file has
   no idea about the file true size.

   This means that Close() on the wrapper level must always include
   Truncate() as well as wrapper __dtor should call Close() and
   against double Close().
   Move buffered/unbuffered write logic to the wrapper.
   Utilize Aligned buffer class.
   Adjust tests and implement Truncate() where necessary.
   Come up with reasonable defaults for new virtual interfaces.
   Forward calls for RandomAccessReadAhead class to avoid double
   buffering and locking (double locking in unbuffered mode on WIndows).
2015-09-11 09:57:02 -07:00
Andres Noetzli
c25f6a85bf Removed __unused__ attribute
Summary:
The current build is failing on some platforms due to an __unused__ attribute.
This patch prevents the problem by using a pattern similar to MergeHelper
(assert not on the variable but inside a condition that uses the variable). We
should have better error handling in both cases in the future.

Test Plan: make clean all check

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

Reviewed By: aekmekji

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46623
2015-09-10 15:16:32 -07:00
Ari Ekmekji
6db0a939d2 Fix DBCompactionTest failure with parallel L0-L1 compactions
Summary:
The test SuggestCompactRangeNoTwoLevel0Compactions in
DBCompactionTest fails when there are parallel L0-L1 compactions
taking place because the test makes sure that only one compaction
involving L0 takes place at any given time (since before having
parallel compactions this was impossible). I changed the test to only
run with DBOptions.max_subcompactions=1 so as to not hit this issue
which is not a correctness issue but just an inherent changing of
assumptions after introducing parallel compactions.

This failed after landing https://reviews.facebook.net/D43269#inline-321303
so now this should fix it

Test Plan: make all && make check

Reviewers: yhchiang, igor, anthony, noetzli, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46617
2015-09-10 14:37:00 -07:00
Andres Noetzli
8aa1f15197 Refactored common code of Builder/CompactionJob out into a CompactionIterator
Summary:
Builder and CompactionJob share a lot of fairly complex code. This patch
refactors this code into a separate class, the CompactionIterator. Because the
shared code is fairly complex, this patch hopefully improves maintainability.
While there are is a lot of potential for further improvements, the patch is
intentionally pretty close to the original structure because the change is
already complex enough.

Test Plan: make clean all check && ./db_stress

Reviewers: rven, anthony, yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46197
2015-09-10 14:35:25 -07:00
Igor Canadi
95ffc5d2bc Correct ASSERT_OK() in ReadDroppedColumnFamily
Summary: ReadDroppedColumnFamily is consistently failing in Travis CI environment (can't repro locally). I suspect it might be failing with non-OK status. This diff will give us more info about the failure.

Test Plan: none

Reviewers: sdong, kradhakrishnan

Reviewed By: kradhakrishnan

Subscribers: kradhakrishnan, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46611
2015-09-10 14:17:12 -07:00
Ari Ekmekji
3c37b3cccd Determine boundaries of subcompactions
Summary:
Up to this point, the subcompactions that make up a compaction
job have been divided based on the key range of the L1 files, and each
subcompaction has handled the key range of only one file. However
DBOption.max_subcompactions allows the user to designate how many
subcompactions at most to perform. This patch updates the
CompactionJob::GetSubcompactionBoundaries() to determine these
divisions accordingly based on that option and other input/system factors.

The current approach orders the starting and/or ending keys of certain
compaction input files and then generates a histogram to approximate the
size covered by the key range between each consecutive pair of keys. Then
it groups these ranges into groups so that the sizes are approximately equal
to one another. The approach has also been adapted to work for universal
compaction as well instead of just for level-based compaction as it was before.

These subcompactions are then executed in parallel by locally spawning
threads, one for each. The results are then aggregated and the compaction
completed.

Test Plan: make all && make check

Reviewers: yhchiang, anthony, igor, noetzli, sdong

Reviewed By: sdong

Subscribers: MarkCallaghan, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43269
2015-09-10 13:50:00 -07:00
krad
1126644082 Relaxing consistency detection to include errors while inserting to memtable as WAL recovery error.
Summary: The current code, considers data to be consistent if the record
checksum passes. We do have customer issues where the record checksum passed but
the data was incomprehensible. There is no way to get out of this error case
since all WAL recovery model will consider this error as unrelated to WAL.

Relaxing the definition and including errors while inserting to memtable as WAL
errors and handing them as per the recovery level.

Test Plan: Used customer dump to verify the fix for different level. The db
opens for kSkipAnyCorruptedRecords and kPointInTimeRecovery, but fails for
kAbsoluteConsistency and kTolerateCorruptedTailRecords.

Reviewers: sdon igor

CC: leveldb@

Task ID: #7918721

Blame Rev:
2015-09-10 12:56:17 -07:00
sdong
abc7f5fdb2 Make DBTest.ReadLatencyHistogramByLevel more robust
Summary: DBTest.ReadLatencyHistogramByLevel was not written as expected. After writes, reads aren't guaranteed to hit data written. It was not expected. Fix it.

Test Plan: Run the test multiple times

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

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D46587
2015-09-10 11:32:19 -07:00
Igor Canadi
ac9bcb55ce Set max_open_files based on ulimit
Summary: We should never set max_open_files to be bigger than the system's ulimit. Otherwise we will get "Too many open files" errors. See an example in this Travis run: https://travis-ci.org/facebook/rocksdb/jobs/79591566

Test Plan:
make check

I will also verify that max_max_open_files is reasonable.

Reviewers: anthony, kradhakrishnan, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46551
2015-09-10 10:49:28 -07:00
agiardullo
b5b2b75e52 better tuning of arena block size
Summary: Currently, if users didn't set options.arena_block_size, we set "result.arena_block_size = result.write_buffer_size / 10". It makes result.arena_block_size not a multiplier of 4KB, even if options.write_buffer_size is a multiplier of MBs. When calling malloc to arena_block_size, we may waste a small amount of memory for it. We now make the default to be /8 or /16 and align it to 4KB.

Test Plan: unit tests

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46467
2015-09-08 20:53:32 -07:00
sdong
342ba80895 Make DBTest.OptimizeFiltersForHits more deterministic
Summary:
This commit makes DBTest.OptimizeFiltersForHits more deterministic by:
(1) make key inserts more random
(2) make sure L0 has one file
(3) make file size smaller compared to level target so L1 will cover more range.

Test Plan: Run the test many times.

Reviewers: rven, IslamAbdelRahman, kradhakrishnan, igor, anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D46461
2015-09-08 19:31:34 -07:00
Andres Notzli
e17e92ea19 Relaxed assert in forward iterator
Summary:
It looks like in some cases an assert in SeekInternal failed when computing the
hints for the next level because user_key was the same as the largest key and
not strictly smaller. Relaxing the assert to expect smaller or equal keys.

Test Plan: make clean all check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46443
2015-09-08 17:15:11 -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
Andres Noetzli
3a0df7f161 Fixed comparison in ForwardIterator when computing hint for GetNextLevelIndex()
Summary: When computing the hint for GetNextLevelIndex(), ForwardIterator was doing a redundant comparison. This patch fixes the comparison (using https://github.com/facebook/rocksdb/blob/master/db/version_set.cc#L158 as a reference) and moves it inside an assert because we expect `level_files[f_idx]` to contain the next key after Seek(), so user_key should always be smaller than the largest key.

Test Plan: make clean all check

Reviewers: rven, anthony, yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: tnovak, sdong, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D46227
2015-09-08 09:47:54 -07:00
Venkatesh Radhakrishnan
91f3c90792 Fix case when forward iterator misses a new update
Summary:
This diff fixes a case when the forward iterator misses a new
insert when the mutable iterator is not current. The test is also
improved and the check for deleted iterators is made more informative.

Test Plan: DBTailingIteratorTest.*Trim

Reviewers: tnovak, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D46167
2015-09-04 14:28:45 -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
3e0a672c50 Bug fix: table readers created by TableCache::Get() doesn't have latency histogram reported
Summary: TableCache::Get() puts parameters in the wrong places so that table readers created by Get() will not have the histogram updated.

Test Plan: Will write a unit test for that.

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D46035
2015-09-02 12:57:07 -07:00
Tomislav Novak
5508122ed6 Fix a perf regression in ForwardIterator
Summary:
I noticed that memtable iterator usually crosses the `iterate_upper_bound`
threshold when tailing. Changes introduced in D43833 made `NeedToSeekImmutable`
always return true in such case, even when `Seek()` only needs to rewind the
memtable iterator. In a test I ran, this caused the "tailing efficiency"
(ratio of calls to `Seek()` that only affect the memtable versus all seeks)
to drop almost to zero.

This diff attempts to fix the regression by using a different flag to indicate
that `current_` is over the limit instead of resetting `valid_` in
`UpdateCurrent()`.

Test Plan: `DBTestTailingIterator.TailingIteratorUpperBound`

Reviewers: sdong, rven

Reviewed By: rven

Subscribers: dhruba, march

Differential Revision: https://reviews.facebook.net/D45909
2015-09-01 09:54:30 -07:00
Andres Notzli
b722007778 Fix listener_test when using ROCKSDB_MALLOC_USABLE_SIZE
Summary:
Flushes in listener_test happened to early when ROCKSDB_MALLOC_USABLE_SIZE was
active (e.g. when compiling with ROCKSDB_FBCODE_BUILD_WITH_481=1) due to
malloc_usable_size() reporting a better estimate (similar to
https://reviews.facebook.net/D43317 ). This patch grows the write buffer size
slightly to compensate for this.

Test Plan: ROCKSDB_FBCODE_BUILD_WITH_481=1 make listener_test && ./listener_test

Reviewers: rven, anthony, yhchiang, igor, sdong

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45921
2015-08-31 23:11:12 -07:00
agiardullo
18db1e4695 better db_bench options for transactions
Summary:
Pessimistic Transaction expiration time checking currently causes a performace regression,  Lets disable it in db_bench by default.

Also, in order to be able to better tune how much contention we're simulating, added new optinos to set lock timeout and snapshot.

Test Plan: run db_bench randomtranansaction

Reviewers: sdong, igor, yhchiang, MarkCallaghan

Reviewed By: MarkCallaghan

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45831
2015-08-31 15:56:07 -07:00
Ari Ekmekji
8b689546b6 Add Subcompactions to Universal Compaction Unit Tests
Summary:
Now that the approach to parallelizing L0-L1 level-based
compactions by breaking the compaction job into subcompactions is
being extended to apply to universal compactions as well, the unit
tests need to account for this and run the universal compaction
tests with subcompactions both enabled and disabled.

Test Plan: make all && make check

Reviewers: sdong, igor, noetzli, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D45657
2015-08-31 12:59:02 -07:00
sdong
3d78eb66bb Arena usage to be calculated using malloc_usable_size()
Summary: malloc_usable_size() gets a better estimation of memory usage. It is already used to calculate block cache memory usage. Use it in arena too.

Test Plan: Run all unit tests

Reviewers: anthony, kradhakrishnan, rven, IslamAbdelRahman, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43317
2015-08-31 09:39:27 -07:00
Andres Noetzli
effd9dd1e1 Fix deadlock in WAL sync
Summary:
MarkLogsSynced() was doing `logs_.erase(it++);`. The standard is saying:

```
all iterators and references are invalidated, unless the erased members are at an end (front or back) of the deque (in which case only iterators and references to the erased members are invalidated)
```

Because `it` is an iterator to the first element of the container, it is
invalidated, only one iteration is executed and `log.getting_synced = false;`
is not being done, so `while (logs_.front().getting_synced)` in `WriteImpl()`
is not terminating.

Test Plan: make db_bench && ./db_bench --benchmarks=fillsync

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

Reviewed By: tnovak

Subscribers: kolmike, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45807
2015-08-28 18:06:32 -07:00
Andres Noetzli
72a9b73c9e Removed unnecessary checks in DBTest.ApproximateMemoryUsage
Summary:
Just realized that after D45675, part of the code in
DBTest.ApproximateMemoryUsage, does not really test anything anymore, so I
removed it.

Test Plan: make clean all check

Reviewers: rven, igor, sdong, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45783
2015-08-28 11:13:20 -07:00
Venkatesh Radhakrishnan
cb164bfc48 Do not delete iterators for immutable memtables.
Summary:
The immutable memtable iterators are allocated from an arena and there
is no benefit from deleting these. Also the immutable memtables
themselves will continue to be in memory until the version set
containing it is alive. We will not remove immutable memtable iterators
over the upper bound. We now add immutable iterators to the test.

Test Plan: db_tailing_iter_test.TailingIteratorTrimSeekToNext

Reviewers: tnovak, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45597
2015-08-28 11:07:07 -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
Andres Noetzli
e853191c17 Fix DBTest.ApproximateMemoryUsage
Summary:
This patch fixes two issues in DBTest.ApproximateMemoryUsage:
- It was possible that a flush happened between getting the two properties in
  Phase 1, resulting in different numbers for the properties and failing the
  assertion. This is fixed by waiting for the flush to finish before getting
  the properties.
- There was a similar issue in Phase 2 and additionally there was an issue that
  rocksdb.size-all-mem-tables was not monotonically increasing because it was
  possible that a flush happened just after getting the properties and then
  another flush just before getting the properties in the next round. In this
  situation, the reported memory usage decreased. This is fixed by forcing a
  flush before getting the properties.

Note: during testing, I found that kFlushesPerRound does not seem very
accurate. I added a TODO for this and it would be great to get some input on
what to do there.

Test Plan:
The first issue can be made more likely to trigger by inserting a
`usleep(10000);` between the calls to GetIntProperty() in Phase 1.
The second issue can be made more likely to trigger by inserting a
`if (r != 0) usleep(10000);` before the calls to GetIntProperty() and a
`usleep(10000);` after the calls.
Then execute make db_test && ./db_test --gtest_filter=DBTest.ApproximateMemoryUsage

Reviewers: rven, yhchiang, igor, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45675
2015-08-27 16:17:08 -07:00
Yueh-Hsuan Chiang
8ef0144e2f Add argument --show_table_properties to db_bench
Summary:
Add argument --show_table_properties to db_bench

  -show_table_properties (If true, then per-level table properties will be
    printed on every stats-interval when stats_interval is set and
    stats_per_interval is on.) type: bool default: false

Test Plan:
./db_bench --show_table_properties=1 --stats_interval=100000 --stats_per_interval=1
./db_bench --show_table_properties=1 --stats_interval=100000 --stats_per_interval=1 --num_column_families=2

Sample Output:

    Compaction Stats [column_family_name_000001]
    Level    Files   Size(MB) Score Read(GB)  Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) Comp(cnt) Avg(sec) Stall(cnt)  KeyIn KeyDrop
    ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
      L0      3/0          5   0.8      0.0     0.0      0.0       0.0      0.0       0.0   0.0      0.0     86.3         0        17    0.021          0       0      0
      L1      5/0          9   0.9      0.0     0.0      0.0       0.0      0.0       0.0   0.0      0.0      0.0         0         0    0.000          0       0      0
      L2      9/0         16   0.2      0.0     0.0      0.0       0.0      0.0       0.0   0.0      0.0      0.0         0         0    0.000          0       0      0
     Sum     17/0         31   0.0      0.0     0.0      0.0       0.0      0.0       0.0   1.0      0.0     86.3         0        17    0.021          0       0      0
     Int      0/0          0   0.0      0.0     0.0      0.0       0.0      0.0       0.0   1.0      0.0     83.9         0         2    0.022          0       0      0
    Flush(GB): cumulative 0.030, interval 0.004
    Stalls(count): 0 level0_slowdown, 0 level0_numfiles, 0 memtable_compaction, 0 leveln_slowdown_soft, 0 leveln_slowdown_hard

    Level[0]: # data blocks=2571; # entries=84813; raw key size=2035512; raw average key size=24.000000; raw value size=8481300; raw average value size=100.000000; data block size=5690119; index block size=82415; filter block size=0; (estimated) table size=5772534; filter policy name=N/A;
    Level[1]: # data blocks=4285; # entries=141355; raw key size=3392520; raw average key size=24.000000; raw value size=14135500; raw average value size=100.000000; data block size=9487353; index block size=137377; filter block size=0; (estimated) table size=9624730; filter policy name=N/A;
    Level[2]: # data blocks=7713; # entries=254439; raw key size=6106536; raw average key size=24.000000; raw value size=25443900; raw average value size=100.000000; data block size=17077893; index block size=247269; filter block size=0; (estimated) table size=17325162; filter policy name=N/A;
    Level[3]: # data blocks=0; # entries=0; raw key size=0; raw average key size=0.000000; raw value size=0; raw average value size=0.000000; data block size=0; index block size=0; filter block size=0; (estimated) table size=0; filter policy name=N/A;
    Level[4]: # data blocks=0; # entries=0; raw key size=0; raw average key size=0.000000; raw value size=0; raw average value size=0.000000; data block size=0; index block size=0; filter block size=0; (estimated) table size=0; filter policy name=N/A;
    Level[5]: # data blocks=0; # entries=0; raw key size=0; raw average key size=0.000000; raw value size=0; raw average value size=0.000000; data block size=0; index block size=0; filter block size=0; (estimated) table size=0; filter policy name=N/A;
    Level[6]: # data blocks=0; # entries=0; raw key size=0; raw average key size=0.000000; raw value size=0; raw average value size=0.000000; data block size=0; index block size=0; filter block size=0; (estimated) table size=0; filter policy name=N/A;

Reviewers: anthony, IslamAbdelRahman, MarkCallaghan, sdong, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45651
2015-08-26 18:27:23 -07:00
Igor Canadi
5f4166c90e ReadaheadRandomAccessFile -- userspace readahead
Summary:
ReadaheadRandomAccessFile acts as a transparent layer on top of RandomAccessFile. When a Read() request is issued, it issues a much bigger request to the OS and caches the result. When a new request comes in and we already have the data cached, it doesn't have to issue any requests to the OS.

We add ReadaheadRandomAccessFile layer only when file is read during compactions.

D45105 was incorrectly closed by Phabricator because I committed it to a separate branch (not master), so I'm resubmitting the diff.

Test Plan: make check

Reviewers: MarkCallaghan, sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45123
2015-08-26 15:25:59 -07:00
sdong
d286b5df90 DBIter to out extra keys with higher sequence numbers when changing direction from forward to backward
Summary:
When DBIter changes iterating direction from forward to backward, it might see some much larger keys with higher sequence ID. With this commit, these rows will be actively filtered out. It should fix existing disabled tests in db_iter_test.

This may not be a perfect fix, but it introduces least impact on existing codes, in order to be safe.

Test Plan:
Enable existing tests and make sure they pass. Add a new test DBIterWithMergeIterTest.InnerMergeIteratorDataRace8.
Also run all existing tests.

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

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45567
2015-08-26 13:01:39 -07:00
Andres Noetzli
3795449c9d Fix DBTest.GetProperty
Summary:
DBTest.GetProperty was failing occasionally (see task #8131266). The reason was
that the test closed the database before the compaction was done. When the test
reopened the database, RocksDB would schedule a compaction which in turn
created table readers and lead the test to fail the assertion that
rocksdb.estimate-table-readers-mem is 0. In most cases, GetIntProperty() of
rocksdb.estimate-table-readers-mem happened before the compaction created the
table readers, hiding the problem. This patch changes the
WaitForFlushMemTable() to WaitForCompact(). WaitForFlushMemTable() is not
necessary because it is already being called a couple of lines before without
any insertions in-between.

Test Plan:
Insert `usleep(10000);` just after `Reopen(options);` on line 2333 to make the issue more likely, then run:
make db_test && while ./db_test --gtest_filter=DBTest.GetProperty; do true; done

Reviewers: rven, yhchiang, anthony, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45603
2015-08-26 10:10:26 -07:00
Igor Canadi
a7834a1292 Merge pull request #698 from yuslepukhin/address_noexcept_windows
Address noexcept and const integer lambda capture on win
2015-08-25 17:15:23 -07:00
Dmitri Smirnov
6924d7582b Address noexcept and const integer lambda capture
VS 2013 does not support noexcept.
   Complains about usage of ineteger constant within lambda requiring explicit capture.
2015-08-25 15:17:14 -07:00
Ari Ekmekji
2f8d71ec05 Moving sequence number compaction variables from SubCompactionState to CompactionJob
Summary:
It was pointed out to me that the members of SubCompactionState
'earliest_snapshot', 'latest_snapshot' and 'visible_at_tip' are never
modified by the subcompactions, so they can stay as global varaibles
instead to make things simpler.

Test Plan: make all && make check

Reviewers: sdong, igor, noetzli, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D45477
2015-08-25 14:03:10 -07:00
Venkatesh Radhakrishnan
bab9934d9e Fix build failure caused by bad merge.
Summary: There was a bad merge during refresh.

Test Plan: make -j all; make check

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D45555
2015-08-25 14:02:03 -07:00
Venkatesh Radhakrishnan
4d28a7d8ab Add a whitebox test for deleted file iterators.
Summary:
We have earlier added a feature to delete file iterators when the
current key is over the iterate upper bound. We now add a whitebox test
to check if the file iterators were actually deleted.

Test Plan: Add check for a range which has deleted iterators.

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45321
2015-08-25 13:40:58 -07:00
Venkatesh Radhakrishnan
249fb4f881 Fix use of deleted file iterators with incomplete iterators
Summary:
After deleting file iterators which are over the iterate upper
bound, we also need to check for null pointers in
ResetIncompletIterators.

Test Plan: db_tailing_iter_test.TailingIteratorTrimSeekToNext

Reviewers: tnovak, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45525
2015-08-25 13:38:35 -07:00
Andres Notzli
09d982f9e0 Fix compact_files_example
Summary:
See task #7983654. The example was triggering an assert in compaction job
because the compaction was not marked as manual. With this patch,
CompactionPicker::FormCompaction() marks compactions as manual. This patch
also fixes a couple of typos, adds optimistic_transaction_example to
.gitignore and librocksdb as a dependency for examples. Adding librocksdb as
a dependency makes sure that the examples are built with the latest changes
in librocksdb.

Test Plan: make clean && cd examples && make all && ./compact_files_example

Reviewers: rven, sdong, anthony, igor, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45117
2015-08-25 12:29:44 -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
Andres Noetzli
2050832974 Fixing race condition in DBTest.DynamicMemtableOptions
Summary:
This patch fixes a race condition in DBTEst.DynamicMemtableOptions. In rare cases,
it was possible that the main thread would fill up both memtables before the flush
job acquired its work. Then, the flush job was flushing both memtables together,
producing only one L0 file while the test expected two. Now, the test waits for
flushes to finish earlier, to make sure that the memtables are flushed in separate
flush jobs.

Test Plan:
Insert "usleep(10000);" after "IOSTATS_SET_THREAD_POOL_ID(Env::Priority::HIGH);" in BGWorkFlush()
to make the issue more likely. Then test with:
make db_test && time while ./db_test --gtest_filter=*DynamicMemtableOptions; do true; done

Reviewers: rven, sdong, yhchiang, anthony, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45429
2015-08-24 17:04:18 -07:00
Igor Canadi
e46bcc08b9 Remove an extra 's' from cur-size-all-mem-tabless
Summary: As title

Test Plan: make check

Reviewers: yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45447
2015-08-24 16:43:18 -07:00
Igor Canadi
4ab26c5ad1 Smarter purging during flush
Summary:
Currently, we only purge duplicate keys and deletions during flush if `earliest_seqno_in_memtable <= newest_snapshot`. This means that the newest snapshot happened before we first created the memtable. This is almost never true for MyRocks and MongoRocks.

This patch makes purging during flush able to understand snapshots. The main logic is copied from compaction_job.cc, although the logic over there is much more complicated and extensive. However, we should try to merge the common functionality at some point.

I need this patch to implement no_overwrite_i_promise functionality for flush. We'll also need this to support SingleDelete() during Flush(). @yoshinorim requested the feature.

Test Plan:
make check
I had to adjust some unit tests to understand this new behavior

Reviewers: yhchiang, yoshinorim, anthony, sdong, noetzli

Reviewed By: noetzli

Subscribers: yoshinorim, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42087
2015-08-24 11:11:12 -07:00
Ari Ekmekji
b6def58f73 Changed 'num_subcompactions' to the more accurate 'max_subcompactions'
Summary:
Up until this point we had DbOptions.num_subcompactions, but
it is semantically more correct to call this max_subcompactions since
we will schedule *up to* DbOptions.max_subcompactions smaller compactions
at a time during a compaction job.

I also added a --subcompactions option to db_bench

Test Plan: make all   make check

Reviewers: sdong, igor, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D45069
2015-08-21 14:25:34 -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
9130873a13 Add options.new_table_reader_for_compaction_inputs
Summary: Currently compaction inputs share the same file descriptor and table reader as other foreground threads. It makes fadvise works less predictable. Add options.new_table_reader_for_compaction_inputs to enforce to create a new file descriptor and new table reader for it.

Test Plan: Add the option.

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

Reviewed By: igor

Subscribers: igor, MarkCallaghan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43311
2015-08-21 08:46:29 -07:00
sdong
07d2d34160 Add a counter about estimated pending compaction bytes
Summary:
Add a counter of estimated bytes the DB needs to compact for all the compactions to finish. Expose it as a DB Property.
In the future, we can use threshold of this counter to replace soft rate limit and hard rate limit. A single threshold of estimated compaction debt in bytes will be easier for users to reason about when should slow down and stopping than more abstract soft and hard rate limits.

Test Plan: Add unit tests

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

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D44205
2015-08-20 22:17:10 -07:00
Yueh-Hsuan Chiang
a203b913c1 Fixed a rare deadlock in DBTest.ThreadStatusFlush
Summary:
Currently, ThreadStatusFlush uses two sync-points to ensure
there's a flush currently running when calling GetThreadList().
However, one of the sync-point is inside db-mutex, which could
cause deadlock in case there's a DB::Get() call.

This patch fix this issue by moving the sync-point to a better
place where the flush job does not hold the mutex.

Test Plan: db_test

Reviewers: igor, sdong, anthony, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45045
2015-08-20 17:18:47 -07:00
Siying Dong
962aa64292 Merge pull request #695 from yuslepukhin/address_windows_build
Address windows build issues caused by introducing Subcompaction
2015-08-20 17:04:48 -07:00
Dmitri Smirnov
5bf8907622 More indent adjustment. 2015-08-20 14:14:02 -07:00
Dmitri Smirnov
e2a9f43d64 Adjust indent 2015-08-20 14:10:51 -07:00
Dmitri Smirnov
1cac89c9b1 Address windows build issues
Intro SubCompactionState move functionality
 =delete copy functionality
 #ifdef SyncPoint in tests for Windows Release builds
2015-08-20 14:08:24 -07:00
Islam AbdelRahman
027ca5b2cd Total SST files size DB Property
Summary: Add a new DB property that calculate the total size of files used by all RocksDB Versions

Test Plan: Unittests for the new property

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

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D44799
2015-08-20 11:47:19 -07:00
Andres Noetzli
b604d2562f Removing unused variables to fix build
Summary: Removing two unused variables that prevented compilation.

Test Plan: make all

Reviewers: rven, sdong, yhchiang, anthony, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D44991
2015-08-19 16:57:40 -07:00
Venkatesh Radhakrishnan
1b114eed4d Free file iterators for files which are above the iterate upper bound to Improve memory utilization
Summary:
This diff improves the memory utilization for tailing iterators RocksDB,
by freeing file iterators which are over the upper bound.
It is an updating on Siying's original diff for improving the memory usage for
tailing iterators. The changes for the seek and next path are now complete
and a test has been added to exercise these paths while deleting file iterators
which are above the upper bound.

Test Plan: db_tailing_iter_test.TailingIteratorTrimSeekToNext

Reviewers: march, tnovak, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43833
2015-08-19 16:05:51 -07:00
Islam AbdelRahman
3fd70b05b8 Rate limit deletes issued by DestroyDB
Summary: Update DestroyDB so that all SST files in the first path id go through DeleteScheduler instead of being deleted immediately

Test Plan: added a unittest

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

Reviewed By: sdong

Subscribers: jeanxu2012, dhruba

Differential Revision: https://reviews.facebook.net/D44955
2015-08-19 15:02:17 -07:00
Yueh-Hsuan Chiang
df79eafcb3 Introduce GetIntProperty("rocksdb.size-all-mem-tables")
Summary:
Currently, GetIntProperty("rocksdb.cur-size-all-mem-tables") only returns
the memory usage by those memtables which have not yet been flushed.

This patch introduces GetIntProperty("rocksdb.size-all-mem-tables"),
which includes the memory usage by all the memtables, includes those
have been flushed but pinned by iterators.

Test Plan: Added a test in db_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D44229
2015-08-19 13:32:09 -07:00
sdong
888fbdc889 Remove the contstaint that iterator upper bound needs to be within a prefix
Summary: There is a check to fail the iterator if prefix extractor is specified but upper bound is out of the prefix for the seek key. Relax this constraint to allow users to set upper bound to the next prefix of the current one.

Test Plan: make commit-prereq

Reviewers: igor, anthony, kradhakrishnan, yhchiang, rven

Reviewed By: rven

Subscribers: tnovak, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D44949
2015-08-19 11:03:51 -07:00
Ari Ekmekji
137c376675 Removing variables used only in assertions to prevent build error
Summary:
A couple variables were declared but only used in assertions
which causes issues when building in fbcode.

Test Plan: make dbg  and   make release

Reviewers: yhchiang, sdong, igor, anthony, MarkCallaghan

Reviewed By: MarkCallaghan

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D44937
2015-08-19 08:52:22 -07:00
Ari Ekmekji
b47cc58516 Bounding Number of Subcompactions
Summary:
In D43239 (https://reviews.facebook.net/D43239) the number
of subcompactions is set based on the number of L1 files with
unique starting keys. In certain cases when this number is very large
this causes issues, particularly with the overlap between files since
very small output files can be generated. This diff bounds the number
of subcompactions to the user option DBOption.num_subcompactions.

Test Plan: ./db_test ./db_compaction_test

Reviewers: sdong, igor, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D44883
2015-08-18 14:56:31 -07:00
Venkatesh Radhakrishnan
e58e1b18e7 Make tailing iterator show new entries in memtable.
Summary:
Reseek mutable_iter if it is invalid in Next and immutable_iter
is invalid.

Test Plan: DBTestTailingIterator.TailingIteratorSeekToNext

Reviewers: tnovak, march, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D44865
2015-08-18 14:40:06 -07:00
Ari Ekmekji
601b1aaca0 Fixing Failed Assertion in Subcompaction State Diff
Summary:
In D43239 (https://reviews.facebook.net/D43239) there is an
assertion to make sure a subcompaction's output is never empty at the
end of execution. This assertion however breaks the build because some
tests lead to exactly that scenario. So instead I have altered the logic
to handle this case instead of just failing the assertion.

The reason that it is possible for a subcompaction's output to be empty is
that during a sequential execution of subcompactions, if a user aborts the
compaction job then some of the later subcompactions to be executed may
have yet to process any keys and therefore have yet to generate output files.
This becomes very rare once the subcompactions are executed in parallel,
but for now they are still sequential so the case is possible when there is an
early termination, as in some of the tests.

Test Plan: ./db_test  ./db_compaction_test

Reviewers: sdong, igor, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D44877
2015-08-18 12:27:12 -07:00
Ari Ekmekji
f0da6977a3 [Parallel L0-L1 Compaction Prep]: Giving Subcompactions Their Own State
Summary:
In prepration for running multiple threads at the same time during
a compaction job, this patch assigns each subcompaction its own state
(instead of sharing the one global CompactionState). Each subcompaction then
uses this state to update its statistics, keep track of its snapshots, etc.
during the course of execution. Then at the end of all the executions the
statistics are aggregated across the subcompactions so that the final result
is the same as if only one larger compaction had run.

Test Plan: ./db_test  ./db_compaction_test  ./compaction_job_test

Reviewers: sdong, anthony, igor, noetzli, yhchiang

Reviewed By: yhchiang

Subscribers: MarkCallaghan, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43239
2015-08-18 11:06:23 -07:00
Andres Notzli
f32a572099 Simplify querying of merge results
Summary:
While working on supporting mixing merge operators with
single deletes ( https://reviews.facebook.net/D43179 ),
I realized that returning and dealing with merge results
can be made simpler. Submitting this as a separate diff
because it is not directly related to single deletes.

Before, callers of merge helper had to retrieve the merge
result in one of two ways depending on whether the merge
was successful or not (success = result of merge was single
kTypeValue). For successful merges, the caller could query
the resulting key/value pair and for unsuccessful merges,
the result could be retrieved in the form of two deques of
keys and values. However, with single deletes, a successful merge
does not return a single key/value pair (if merge
operands are merged with a single delete, we have to generate
a value and keep the original single delete around to make
sure that we are not accidentially producing a key overwrite).
In addition, the two existing call sites of the merge
helper were taking the same actions independently from whether
the merge was successful or not, so this patch simplifies that.

Test Plan: make clean all check

Reviewers: rven, sdong, yhchiang, anthony, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43353
2015-08-17 17:34:38 -07:00
sdong
72613657f0 Measure file read latency histogram per level
Summary: In internal stats, remember read latency histogram, if statistics is enabled. It can be retrieved from DB::GetProperty() with "rocksdb.dbstats" property, if it is enabled.

Test Plan: Manually run db_bench and prints out "rocksdb.dbstats" by hand and make sure it prints out as expected

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

Reviewed By: yhchiang

Subscribers: MarkCallaghan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D44193
2015-08-14 17:32:42 -07:00
Nathan Bronson
b7198c3afe reduce db mutex contention for write batch groups
Summary:
This diff allows a Writer to join the next write batch group
without acquiring any locks. Waiting is performed via a per-Writer mutex,
so all of the non-leader writers never need to acquire the db mutex.
It is now possible to join a write batch group after the leader has been
chosen but before the batch has been constructed. This diff doesn't
increase parallelism, but reduces synchronization overheads.

For some CPU-bound workloads (no WAL, RAM-sized working set) this can
substantially reduce contention on the db mutex in a multi-threaded
environment.  With T=8 N=500000 in a CPU-bound scenario (see the test
plan) this is good for a 33% perf win.  Not all scenarios see such a
win, but none show a loss.  This code is slightly faster even for the
single-threaded case (about 2% for the CPU-bound scenario below).

Test Plan:
1. unit tests
2. COMPILE_WITH_TSAN=1 make check
3. stress high-contention scenarios with db_bench -benchmarks=fillrandom -threads=$T -batch_size=1 -memtablerep=skip_list -value_size=0 --num=$N -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

Reviewers: sdong, igor, rven, ljin, yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43887
2015-08-14 10:55:43 -07:00
sdong
603b6da8b8 Add options.compaction_measure_io_stats to print write I/O stats in compactions
Summary:
Add options.compaction_measure_io_stats to print out / pass to listener accumulated time spent on write calls. Example outputs in info logs:

2015/08/12-16:27:59.463944 7fd428bff700 (Original Log Time 2015/08/12-16:27:59.463922) EVENT_LOG_v1 {"time_micros": 1439422079463897, "job": 6, "event": "compaction_finished", "output_level": 1, "num_output_files": 4, "total_output_size": 6900525, "num_input_records": 111483, "num_output_records": 106877, "file_write_nanos": 15663206, "file_range_sync_nanos": 649588, "file_fsync_nanos": 349614797, "file_prepare_write_nanos": 1505812, "lsm_state": [2, 4, 0, 0, 0, 0, 0]}

Add two more counters in iostats_context.

Also add a parameter of db_bench.

Test Plan: Add a unit test. Also manually verify LOG outputs in db_bench

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D44115
2015-08-13 16:52:26 -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
agiardullo
0db807ec28 Transaction error statuses
Summary:
Based on feedback from spetrunia, we should better differentiate error statuses for transaction failures.

https://github.com/MySQLOnRocksDB/mysql-5.6/issues/86#issuecomment-124605954

Test Plan: unit tests

Reviewers: rven, kradhakrishnan, spetrunia, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43323
2015-08-11 17:52:56 -07:00
agiardullo
c2f2cb0214 Pessimistic Transactions
Summary:
Initial implementation of Pessimistic Transactions.  This diff contains the api changes discussed in D38913.  This diff is pretty large, so let me know if people would prefer to meet up to discuss it.

MyRocks folks:  please take a look at the API in include/rocksdb/utilities/transaction[_db].h and let me know if you have any issues.

Also, you'll notice a couple of TODOs in the implementation of RollbackToSavePoint().  After chatting with Siying, I'm going to send out a separate diff for an alternate implementation of this feature that implements the rollback inside of WriteBatch/WriteBatchWithIndex.  We can then decide which route is preferable.

Next, I'm planning on doing some perf testing and then integrating this diff into MongoRocks for further testing.

Test Plan: Unit tests, db_bench parallel testing.

Reviewers: igor, rven, sdong, yhchiang, yoshinorim

Reviewed By: sdong

Subscribers: hermanlee4, maykov, spetrunia, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D40869
2015-08-11 17:52:23 -07:00
Islam AbdelRahman
c2868cbc52 Use manual_compaction for compaction_job_test
Summary:
Under certain conditions (disable compression) the compactions that are created in compaction_job_test will pass the trivial_move conditions
This will cause problems since we assert that we dont run a compaction if it's a trivial move
https://github.com/facebook/rocksdb/blob/master/db/compaction_job.cc#L144-L147

for example when we disable compression, compactions become a valid trivial move and the assert fails
https://ci-builds.fb.com/view/rocksdb/job/rocksdb_no_compression/180/console

Test Plan: compaction_job_test

Reviewers: sdong, yhchiang, noetzli, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43983
2015-08-11 14:47:14 -07:00
Islam AbdelRahman
cee1e8a080 Parallelize LoadTableHandlers
Summary: Add a new option that all LoadTableHandlers to use multiple threads to load files on DB Open and Recover

Test Plan:
make check -j64
COMPILE_WITH_TSAN=1 make check -j64
DISABLE_JEMALLOC=1 make all valgrind_check -j64 (still running)

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

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43755
2015-08-11 12:19:56 -07:00
Andres Notzli
4249f159d5 Removing duplicate code in db_bench/db_stress, fixing typos
Summary:
While working on single delete support for db_bench, I realized that
db_bench/db_stress contain a bunch of duplicate code related to
copmression and found some typos. This patch removes duplicate code,
typos and a redundant #ifndef in internal_stats.cc.

Test Plan: make db_stress && make db_bench && ./db_bench --benchmarks=compress,uncompress

Reviewers: yhchiang, sdong, rven, anthony, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43965
2015-08-11 11:46:15 -07:00
Nathan Bronson
1ae27113c7 reduce comparisons by skiplist
Summary:
Key comparison is the single largest CPU user for CPU-bound
workloads. This diff reduces the number of comparisons in two ways.

The first is that it moves predecessor array gathering from
FindGreaterOrEqual to FindLessThan, so that FindGreaterOrEqual can
return immediately if compare_ returns 0.  As part of this change I
moved the sequential insertion optimization into Insert, to remove the
undocumented (and smelly) requirement that prev must be equal to prev_
if it is non-null.

The second optimization is that all of the search functions skip calling
compare_ when moving to a lower level that has the same Next pointer.
With a branching factor of 4 we would expect this to happen 1/4 of
the time.

On a single-threaded CPU-bound workload (-benchmarks=fillrandom -threads=1
-batch_size=1 -memtablerep=skip_list -value_size=0 --num=1600000
-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)
on my dev server this is good for a 7% perf win.

Test Plan: unit tests

Reviewers: rven, ljin, yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43233
2015-08-11 11:25:22 -07:00
Islam AbdelRahman
a9dcc0a638 Fix clang build
Summary:
https://ci-builds.fb.com/view/rocksdb/job/rocksdb_clang_build/893/console
Fixing clang build

Test Plan:
make clean
USE_CLANG=1 make all -j64

Reviewers: sdong, noetzli, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43959
2015-08-10 11:30:36 -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
agiardullo
16ea1c7d1c simple ManagedSnapshot wrapper
Summary: Implemented this simple wrapper for something else I was working on.  Seemed like it makes sense to expose it instead of burying it in some random code.

Test Plan: added test

Reviewers: rven, kradhakrishnan, sdong, yhchiang

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43293
2015-08-06 17:59:05 -07:00
sdong
6a4aaadcd7 Avoid type unique_ptr in LogWriterNumber::writer for Windows build break
Summary:
Visual Studio complains about deque<LogWriterNumber> because LogWriterNumber is non-copyable for its unique_ptr member writer. Move away from it, and do explit free.
It is less safe but I can't think of a better way to unblock it.

Test Plan: valgrind check test

Reviewers: anthony, IslamAbdelRahman, kolmike, rven, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43647
2015-08-06 10:52:41 -07:00
Andres Noetzli
d7314ba759 Fixing endless loop if seeking to end of key with seq num 0
Summary:
When seeking to the last occurrence of a key with sequence number 0, db_iter
ends up in an endless loop because it seeks to type kValueTypeForSeek
which is larger than kTypeDeletion/kTypeValue. Added test case that triggers
the behavior.

Test Plan: make clean all check

Reviewers: igor, rven, anthony, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43653
2015-08-06 10:43:28 -07:00
Islam AbdelRahman
29b028b0ed Make DeleteScheduler tests more reliable
Summary: Update DeleteScheduler tests so that they verify the used penalties for waiting instead of measuring the time spent which is not reliable

Test Plan:
make -j64 delete_scheduler_test && ./delete_scheduler_test
COMPILE_WITH_TSAN=1 make -j64 delete_scheduler_test && ./delete_scheduler_test
COMPILE_WITH_ASAN=1 make -j64 delete_scheduler_test && ./delete_scheduler_test

make -j64 db_test && ./db_test --gtest_filter="DBTest.RateLimitedDelete:DBTest.DeleteSchedulerMultipleDBPaths"
COMPILE_WITH_TSAN=1 make -j64 db_test && ./db_test --gtest_filter="DBTest.RateLimitedDelete:DBTest.DeleteSchedulerMultipleDBPaths"
COMPILE_WITH_ASAN=1 make -j64 db_test && ./db_test --gtest_filter="DBTest.RateLimitedDelete:DBTest.DeleteSchedulerMultipleDBPaths"

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43635
2015-08-05 19:16:52 -07:00
Poornima Chozhiyath Raman
7d364d0d94 Fix build failure
Summary: fix the build failure

Test Plan: make all

Reviewers: sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43623
2015-08-05 16:38:12 -07:00
Poornima Chozhiyath Raman
960d936e83 Add function 'GetInfoLogList()'
Summary: The list of info log files of a db can be obtained using the new function.

Test Plan: New test in db_test.cc passed.

Reviewers: yhchiang, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: IslamAbdelRahman, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41715
2015-08-05 16:16:46 -07:00
sdong
7ccd1c80a7 Add two unit tests for SyncWAL()
Summary:
Add two unit tests for SyncWAL(). One makes sure SyncWAL() doesn't block writes in the other thread. Another one makes sure SyncWAL() doesn't wait ongoing writes to finish before being executed.

Create a new test file db_wal_test and move two WAL related tests from db_test to here.

Test Plan: Run the new tests

Reviewers: IslamAbdelRahman, rven, kradhakrishnan, kolmike, tnovak, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43605
2015-08-05 14:27:02 -07:00
sdong
3ae386eafe Add statistic histogram "rocksdb.sst.read.micros"
Summary: Measure read latency histogram and put in statistics. Compaction inputs are excluded from it when possible (unfortunately usually no possible as we usually take table reader from table cache.

Test Plan:
Run db_bench and it shows the stats, like:

rocksdb.sst.read.micros statistics Percentiles :=> 50 : 1.238522 95 : 2.529740 99 : 3.912180

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

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43275
2015-08-05 13:02:33 -07:00
Islam AbdelRahman
9aec75fbb9 Enable DBTest.FlushSchedule under TSAN
Summary: This patch will fix the false positive of DBTest.FlushSchedule under TSAN, we dont need to disable this test

Test Plan: COMPILE_WITH_TSAN=1 make -j64 db_test && ./db_test --gtest_filter="DBTest.FlushSchedule"

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43599
2015-08-05 11:47:07 -07:00
sdong
8e01bd1144 Fix misplaced position for reversing iterator direction while current key is a merge
Summary:
While doing forward iterating, if current key is merge, internal iterator position is placed to the next key. If Prev() is called now, needs to do extra Prev() to recover the location.
This is second attempt of fixing after reverting ec70fea4c4. This time shrink the fix to only merge key is the current key and avoid the reseeking logic for max_iterating skipping

Test Plan: enable the two disabled tests and make sure they pass

Reviewers: rven, IslamAbdelRahman, kradhakrishnan, tnovak, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D43557
2015-08-05 11:08:50 -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
Mike Kolupaev
e06cf1a098 [wal changes 3/3] method in DB to sync WAL without blocking writers
Summary:
Subj. We really need this feature.

Previous diff D40899 has most of the changes to make this possible, this diff just adds the method.

Test Plan: `make check`, the new test fails without this diff; ran with ASAN, TSAN and valgrind.

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

Reviewed By: sdong

Subscribers: MarkCallaghan, maykov, hermanlee4, yoshinorim, tnovak, dhruba

Differential Revision: https://reviews.facebook.net/D40905
2015-08-05 06:06:39 -07:00
Ari Ekmekji
5dc3e6881a Update Tests To Enable Subcompactions
Summary:
Updated DBTest DBCompactionTest and CompactionJobStatsTest
to run compaction-related tests once with subcompactions enabled and
once disabled using the TEST_P test type in the Google Test suite.

Test Plan: ./db_test  ./db_compaction-test  ./compaction_job_stats_test

Reviewers: sdong, igor, anthony, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43443
2015-08-04 22:19:07 -07:00
Islam AbdelRahman
c45a57b41e Support delete rate limiting
Summary:
Introduce DeleteScheduler that allow enforcing a rate limit on file deletion
Instead of deleting files immediately, files are moved to trash directory and deleted in a background thread that apply sleep penalty between deletes if needed.

I have updated PurgeObsoleteFiles and PurgeObsoleteWALFiles to use the delete_scheduler instead of env_->DeleteFile

Test Plan:
added delete_scheduler_test
existing unit tests

Reviewers: kradhakrishnan, anthony, rven, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D43221
2015-08-04 20:45:27 -07:00
Yueh-Hsuan Chiang
241bb2aef3 Make DBCompactionTest.SkipStatsUpdateTest more stable.
Summary:
Make DBCompactionTest.SkipStatsUpdateTest more stable by
removing flaky but unnecessary assertion on the size of db
as simply checking the random file open count is suffice.

Test Plan: db_compaction_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43533
2015-08-04 15:47:05 -07:00
Yueh-Hsuan Chiang
14d0bfa429 Add DBOptions::skip_sats_update_on_db_open
Summary:
UpdateAccumulatedStats() is used to optimize compaction decision
esp. when the number of deletion entries are high, but this function
can slowdown DBOpen esp. in disk environment.

This patch adds DBOptions::skip_sats_update_on_db_open, which skips
UpdateAccumulatedStats() in DB::Open() time when it's set to true.

Test Plan: Add DBCompactionTest.SkipStatsUpdateTest

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: tnovak, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42843
2015-08-04 13:48:16 -07:00
Venkatesh Radhakrishnan
20b244fcca Fix CompactFiles by adding all necessary files
Summary:
The compact files API had a bug where some overlapping files
are not added. These are files which overlap with files which were
added to the compaction input files, but not to the original set of
input files. This happens only when there are more than two levels
involved in the compaction. An example will illustrate this better.

Level 2 has 1 input file 1.sst which spans [20,30].

Level 3 has added file  2.sst which spans [10,25]

Level 4 has file 3.sst which spans [35,40] and
        input file 4.sst which spans [46,50].

The existing code would not add 3.sst to the set of input_files because
it only becomes an overlapping file in level 4 and it wasn't one in
level 3.

When installing the results of the compaction, 3.sst would overlap with
output file from the compact files and result in the assertion in
version_set.cc:1130

 // Must not overlap
   assert(level <= 0 || level_files->empty() ||
            internal_comparator_->Compare(
                (*level_files)[level_files->size() - 1]->largest, f->smallest) <
                0);
This change now adds overlapping files from the current level to the set
of input files also so that we don't hit the assertion above.

Test Plan:
d=/tmp/j; rm -rf $d; seq 1000 | parallel --gnu --eta
'd=/tmp/j/d-{}; mkdir -p $d; TEST_TMPDIR=$d ./db_compaction_test
--gtest_filter=*CompactilesOnLevel* --gtest_also_run_disabled_tests >&
'$d'/log-{}'

Reviewers: igor, yhchiang, sdong

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43437
2015-08-03 15:53:22 -07:00
Venkatesh Radhakrishnan
87df6295dd Make SuggestCompactRangeNoTwoLevel0Compactions deterministic
Summary:
Made SuggestCompactRangeNoTwoLevel0Compactions by forcing
a flush after generating a file and waiting for compaction at the end.

Test Plan: Run SuggestCompactRangeNoTwoLevel0Compactions

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43449
2015-08-03 15:52:52 -07:00
Ari Ekmekji
40c64434d4 Parallelize L0-L1 Compaction: Restructure Compaction Job
Summary:
As of now compactions involving files from Level 0 and Level 1 are single
threaded because the files in L0, although sorted, are not range partitioned like
the other levels. This means that during L0-L1 compaction each file from L1
needs to be merged with potentially all the files from L0.

This attempt to parallelize the L0-L1 compaction assigns a thread and a
corresponding iterator to each L1 file that then considers only the key range
found in that L1 file and only the L0 files that have those keys (and only the
specific portion of those L0 files in which those keys are found). In this way
the overlap is minimized and potentially eliminated between different iterators
focusing on the same files.

The first step is to restructure the compaction logic to break L0-L1 compactions
into multiple, smaller, sequential compactions. Eventually each of these smaller
jobs will be run simultaneously. Areas to pay extra attention to are

  # Correct aggregation of compaction job statistics across multiple threads
  # Proper opening/closing of output files (make sure each thread's is unique)
  # Keys that span multiple L1 files
  # Skewed distributions of keys within L0 files

Test Plan: Make and run db_test (newer version has separate compaction tests) and compaction_job_stats_test

Reviewers: igor, noetzli, anthony, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: MarkCallaghan, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42699
2015-08-03 11:32:14 -07:00
Andres Notzli
193dc977e7 Fixing dead code in table_properties_collector_test
Summary:
There was a bug in table_properties_collector_test that this patch
is fixing: `!backward_mode && !test_int_tbl_prop_collector` in
TestCustomizedTablePropertiesCollector was never true, so the code
in the if-block never got executed. The reason is that the
CustomizedTablePropertiesCollector test was skipping tests with
`!backward_mode_ && !encode_as_internal`. The reason for skipping
the tests is unknown.

Test Plan: make table_properties_collector_test && ./table_properties_collector_test

Reviewers: rven, igor, yhchiang, anthony, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D43281
2015-07-30 16:59:03 -07:00
agiardullo
8161bdb5a0 WriteBatch Save Points
Summary:
Support RollbackToSavePoint() in WriteBatch and WriteBatchWithIndex.  Support for partial transaction rollback is needed for MyRocks.

An alternate implementation of Transaction::RollbackToSavePoint() exists in D40869.  However, the other implementation is messier because it is implemented outside of WriteBatch.  This implementation is much cleaner and also exposes a potentially useful feature to WriteBatch.

Test Plan: Added unit tests

Reviewers: IslamAbdelRahman, kradhakrishnan, maykov, yoshinorim, hermanlee4, spetrunia, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42723
2015-07-29 16:54:23 -07:00
Andres Notzli
d06c82e477 Further cleanup of CompactionJob and MergeHelper
Summary:
Simplified logic in CompactionJob and removed unused parameter in
MergeHelper.

Test Plan: make && make check

Reviewers: rven, igor, sdong, yhchiang

Reviewed By: sdong

Subscribers: aekmekji, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42687
2015-07-28 19:21:55 -07:00
Andres Notzli
e95c59cd2f Count number of corrupt keys during compaction
Summary:
For task #7771355, we would like to log the number of corrupt keys
during a compaction. This patch implements and tests the count
as part of CompactionJobStats.

Test Plan: make && make check

Reviewers: rven, igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42921
2015-07-28 16:41:40 -07:00
Poornima Chozhiyath Raman
1bdfcef7bf Fix when output level is 0 of universal compaction with trivial move
Summary: Fix for universal compaction with trivial move, when the ouput level is 0. The tests where failing. Fixed by allowing normal compaction when output level is 0.

Test Plan: modified test cases run successfully.

Reviewers: sdong, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: anthony, kradhakrishnan, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42933
2015-07-27 14:25:57 -07:00
sdong
82f148ef97 Fix test DBCompactionTest.PartialCompactionFailure undeterministic failure
Summary: DBCompactionTest.PartialCompactionFailure has a risk that one flush job writes out two mem tables into one file, so that the total files flushed are less than expected. Fix it by writing for flush to finish after every write.

Test Plan: Run the test

Reviewers: IslamAbdelRahman, kradhakrishnan, yhchiang, anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42831
2015-07-22 13:46:56 -07:00
Mike Kolupaev
4922af6f8d fixed DBTest.GetPropertiesOfAllTablesTest and DBTest.GetUserDefinedTablaProperties flakiness
Summary: These tests used to fail if a compaction happened between flushing tables and enumerating them to get properties.

Test Plan: this reports occasional failures without this diff and no failures with it: `for i in {1..10000}; do echo $i; done | parallel --gnu -j100 'TEST_TMPDIR=`TMPDIR=/dev/shm/rockstemp mktemp -d -t` ./db_test --gtest_filter=DBTest.GetUserDefinedTablaProperties >&/dev/null || echo {} failed'`

Reviewers: sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42861
2015-07-22 12:37:49 -07:00
Mike Kolupaev
fe09a6dae3 [wal changes 2/3] write with sync=true syncs previous unsynced wals to prevent illegal data loss
Summary:
I'll just copy internal task summary here:

"
This sequence will cause data loss in the middle after an sync write:

non-sync write key 1
flush triggered, not yet scheduled
sync write key 2
system crash

After rebooting, users might see key 2 but not key 1, which violates the API of sync write.

This can be reproduced using unit test FaultInjectionTest::DISABLED_WriteOptionSyncTest.

One way to fix it is for a sync write, if there is outstanding unsynced log files, we need to syc them too.
"

This diff should be considered together with the next diff D40905; in isolation this fix probably could be a little simpler.

Test Plan: `make check`; added a test for that (DBTest.SyncingPreviousLogs) before noticing FaultInjectionTest.WriteOptionSyncTest (keeping both since mine asserts a bit more); both tests fail without this diff; for D40905 stacked on top of this diff, ran tests with ASAN, TSAN and valgrind

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

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D40899
2015-07-22 03:28:08 -07:00
Andres Notzli
06aebca592 Report live data size estimate
Summary:
Fixes T6548822. Added a new function for estimating the size of the live data
as proposed in the task. The value can be accessed through the property
rocksdb.estimate-live-data-size.

Test Plan:
There are two unit tests in version_set_test and a simple test in db_test.
make version_set_test && ./version_set_test;
make db_test && ./db_test gtest_filter=GetProperty

Reviewers: rven, igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41493
2015-07-21 21:33:20 -07:00
sdong
02b635fa38 Fix undeterministic failure of DBTest.GetPropertiesOfAllTablesTest
Summary: DBTest.GetPropertiesOfAllTablesTest generates four files and expects four files there, but a L0->L1 comapction can trigger to compact to one single file. Fix it by raising level 0 number of file compaction trigger

Test Plan: Run it many times and see it never fails.

Reviewers: kradhakrishnan, IslamAbdelRahman, yhchiang, anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42789
2015-07-21 17:13:23 -07:00
Yueh-Hsuan Chiang
7219088cda Move general compaction tests from db_test.cc to db_compaction_test.cc
Summary: Move general compaction tests from db_test.cc to db_compaction_test.cc

Test Plan:
db_test
db_compaction_test

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42651
2015-07-21 03:05:57 -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
Yueh-Hsuan Chiang
443c6646bc Move remaining universal compaction tests from db_test.cc to db_universal_compaction_test.cc
Summary: Move remaining universal compaction tests from db_test.cc to db_universal_compaction_test.cc

Test Plan:
db_test
db_universal_compaction_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42645
2015-07-20 16:07:54 -07:00
Yueh-Hsuan Chiang
7462286d33 Move in-place-update related tests from db_test.cc to db_inplace_update_test.cc
Summary: Move in-place-update related tests from db_test.cc to db_inplace_update_test.cc

Test Plan:
db_test
db_inplace_update_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42657
2015-07-20 16:05:28 -07:00
Yueh-Hsuan Chiang
331954ab83 Fixed DBTestUniversalManualCompactionOutputPathId test
Summary:
Fixed DBTestUniversalManualCompactionOutputPathId test
by changing the expected number of files when setting up
the test as flushes no-longer preempt compactions
in patch https://reviews.facebook.net/D41931.

Also, include db_universal_copaction_test in make all check.

Test Plan: db_universal_copaction_test

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42639
2015-07-20 13:53:41 -07:00
krad
a75f23eb87 Relax assertions in unit DropWrites to be more permissible
Summary: This unit test is blocking our release since it fails under certain
compiler versions. The failure is due to a race in the unit test and not the
core functionality.

Test Plan: Run locally

Reviewers: sdong

CC: leveldb

Task ID: #7760955

Blame Rev:
2015-07-20 12:37:54 -07:00
sdong
ee80432ff8 db_bench add an option of --universal_allow_trivial_move
Summary: Now we allow trivial move in universal compaction. Add a parameter in db_bench

Test Plan: Run db_bench with this option on and off and make sure the option is switched correctly.

Reviewers: yhchiang, igor, kradhakrishnan, anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41427
2015-07-20 11:56:12 -07:00
sdong
58b4209e05 Trigger non-trivial compaction in fault_injection_test
Summary: Now the major test cases of fault_injection_test only insert keys in sorted order so compactions will be trivial move. Add a new mode to insert in non-sequential order to trigger non-trivial compactions.

Test Plan: Run the test

Reviewers: kradhakrishnan, anthony, IslamAbdelRahman, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42435
2015-07-20 11:51:57 -07:00
Islam AbdelRahman
aa8ac6445b Skip unsupported tests in ROCKSDB_LITE
Summary:
Skipping these tests in ROCKSDB_LITE since they are not supported
json_document_test
wal_manager_test
ttl_test
sst_dump_test
deletefile_test
compact_files_test
prefix_test
checkpoint_test

Test Plan:
json_document_test
wal_manager_test
ttl_test
sst_dump_test
deletefile_test
compact_files_test
prefix_test
checkpoint_test

Reviewers: igor, sdong, yhchiang, kradhakrishnan, anthony

Reviewed By: anthony

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42573
2015-07-20 11:24:54 -07:00
Islam AbdelRahman
c06d1d8393 Make merge_test runnable in ROCKSDB_LITE
Summary: Make merge_test runnable in ROCKSDB_LITE

Test Plan: merge_test

Reviewers: igor, sdong, yhchiang, kradhakrishnan, anthony

Reviewed By: anthony

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42579
2015-07-20 11:17:52 -07:00
Islam AbdelRahman
0d1d9aeebe Block plain_table_db_test in ROCKSDB_LITE
Summary: Block plain_table_db_test in ROCKSDB_LITE since plain table is not supported in ROCKSDB_LITE

Test Plan: plain_table_db_test

Reviewers: igor, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42159
2015-07-20 11:12:02 -07:00
Islam AbdelRahman
f0fe9126f2 Fix compile for write_callback_test in ROCKSDB_LITE
Summary: Add main for write_callback_test when compiled under ROCKSDB_LITE

Test Plan: write_callback_test

Reviewers: igor, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42147
2015-07-20 10:54:15 -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
Islam AbdelRahman
20922c4a5a Make compaction_picker_test runnable in ROCKSDB_LITE
Summary: Remove universal and fifo compaction tests from ROCKSDB_LITE since they are not supported

Test Plan: compaction_picker_test

Reviewers: sdong, igor, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42129
2015-07-20 10:46:09 -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
Igor Canadi
35ca59364c Don't let flushes preempt compactions
Summary:
When we first started, max_background_flushes was 0 by default and compaction thread was executing flushes (since there was no flush thread). Then, we switched the default max_background_flushes to 1. However, we still support the case where there is no flush thread and flushes are done in compaction. This is making our code a bit more complicated. By not supporting this use-case we can make our code simpler.

We have a special case that when you set max_background_flushes to 0, we
schedule the flush to execute on the compaction thread.

Test Plan: make check (there might be some unit tests that depend on this behavior)

Reviewers: IslamAbdelRahman, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41931
2015-07-17 12:02:52 -07:00
Ari Ekmekji
74c755c552 Added JSON manifest dump option to ldb command
Summary:
Added a new flag --json to the ldb manifest_dump command
that prints out the version edits as JSON objects for easier
reading and parsing of information.

Test Plan:
**Sample usage: **
```
./ldb manifest_dump --json --path=path/to/manifest/file
```

**Sample output:**
```
{"EditNumber": 0, "Comparator": "leveldb.BytewiseComparator", "ColumnFamily": 0}
{"EditNumber": 1, "LogNumber": 0, "ColumnFamily": 0}
{"EditNumber": 2, "LogNumber": 4, "PrevLogNumber": 0, "NextFileNumber": 7, "LastSeq": 35356, "AddedFiles": [{"Level": 0, "FileNumber": 5, "FileSize": 1949284, "SmallestIKey": "'", "LargestIKey": "'"}], "ColumnFamily": 0}
...
{"EditNumber": 13, "PrevLogNumber": 0, "NextFileNumber": 36, "LastSeq": 290994, "DeletedFiles": [{"Level": 0, "FileNumber": 17}, {"Level": 0, "FileNumber": 20}, {"Level": 0, "FileNumber": 22}, {"Level": 0, "FileNumber": 24}, {"Level": 1, "FileNumber": 13}, {"Level": 1, "FileNumber": 14}, {"Level": 1, "FileNumber": 15}, {"Level": 1, "FileNumber": 18}], "AddedFiles": [{"Level": 1, "FileNumber": 25, "FileSize": 2114340, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 26, "FileSize": 2115213, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 27, "FileSize": 2114807, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 30, "FileSize": 2115271, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 31, "FileSize": 2115165, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 32, "FileSize": 2114683, "SmallestIKey": "'", "LargestIKey": "'"}, {"Level": 1, "FileNumber": 35, "FileSize": 1757512, "SmallestIKey": "'", "LargestIKey": "'"}], "ColumnFamily": 0}
...
```

Reviewers: sdong, anthony, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41727
2015-07-17 10:07:40 -07:00
Igor Canadi
a96fcd09b7 Deprecate CompactionFilterV2
Summary: It has been around for a while and it looks like it never found any uses in the wild. It's also complicating our compaction_job code quite a bit. We're deprecating it in 3.13, but will put it back in 3.14 if we actually find users that need this feature.

Test Plan: make check

Reviewers: noetzli, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42405
2015-07-17 18:59:11 +02:00
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
sdong
ac2b9367fe Fix a typo in variable
Summary: Typo seqeuntial -> sequential in db/fault_injection_test.cc

Test Plan: Build it

Reviewers: ott, igor, anthony, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42417
2015-07-16 12:17:24 -07:00
sdong
6c0c8dee7b Fix data loss after DB recovery by not allowing flush/compaction to be scheduled until DB opened
Summary:
Previous run may leave some SST files with higher file numbers than manifest indicates.
Compaction or flush may start to run while DB::Open() is still going on. SST file garbage collection may happen interleaving with compaction or flush, and overwrite files generated by compaction of flushes after they are generated. This might cause data loss. This possibility of interleaving is recently introduced.
Fix it by not allowing compaction or flush to be scheduled before DB::Open() finishes.

Test Plan: Add a unit test. This verification will have a chance to fail without the fix but doesn't fix without the fix.

Reviewers: kradhakrishnan, anthony, yhchiang, IslamAbdelRahman, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42399
2015-07-16 10:57:41 -07:00
Andres Notzli
e4af3bfb27 Test for compaction of corrupted keys
Summary:
Fixes T7697334. Adds a simple test to check whether CompactionJob deals
with corrupted keys correctly. Right now, we preserve corrupted keys.
Note: depending on the type of corruption and options like comparators,
CompactionJob fails. This test just checks whether corrupted keys that
do not fail CompactionJob are preserved.

Test Plan:
`make compaction_job_test && ./compaction_job_test` -> Tests pass.
Add `input->Next(); continue;` in CompactionJob::ProcessKeyValueCompaction()
inside then-branch of `!ParseInternalKey(key, &ikey)` -> Tests fail.

Reviewers: sdong, rven, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42237
2015-07-16 09:18:35 -07:00
agiardullo
81d072623c move convenience.h out of utilities
Summary: Moved convenience.h out of utilities to remove a dependency on utilities in db.

Test Plan: unit tests.  Also compiled a link to the old location to verify the _Pragma works.

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42201
2015-07-15 14:51:51 -07:00
Poornima Chozhiyath Raman
beb19ad0dd Fixing delete files in Trivial move of universal compaction
Summary:
Trvial move in universal compaction was failing when trying to move files from levels other than 0.
This was because the DeleteFile while trivially moving, was only deleting files of level 0 which caused duplication of same file in different levels.
This is fixed by passing the right level as argument in the call of DeleteFile while doing trivial move.

Test Plan: ./db_test ran successfully with the new test cases.

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D42135
2015-07-15 12:28:22 -07:00
krad
c613960690 Build fix.
Summary: gcc-4.9-glibc-2.20 complains about uninitialized variable.

db/compaction_picker.cc: In member function 'bool
rocksdb::CompactionPicker::IsInputNonOverlapping(rocksdb::Compaction*)':
db/compaction_picker.cc:1174:17: error:
'prev.rocksdb::{anonymous}::InputFileInfo::f' may be used uninitialized in this
function [-Werror=maybe-uninitialized]
   InputFileInfo prev, curr, next;

Test Plan: pmake on local environment

Reviewers: sdong igor

CC: leveldb@

Task ID: #

Blame Rev:
2015-07-15 11:25:10 -07:00
Aaron Feldman
2c8de0ecae Update --help message in db_bench.
Summary:
Remove --help entry for readhot.

Update read_random_exp_range flag description: The distribution is num *
exp(-r), not num * exp(r).

Test Plan: Run ./db_bench --help

Reviewers: sdong, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42303
2015-07-15 10:21:09 -07:00
Andres Notzli
6b2d44b2ff Refactoring of writing key/value pairs
Summary:
Before, writing key/value pairs out to files was done inside
ProcessKeyValueCompaction(). To make ProcessKeyValueCompaction()
more understandable, this patch moves the writing part to a separate
function. This is intended to be a stepping stone for additional
changes.

Test Plan: make && make check

Reviewers: sdong, rven, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42243
2015-07-15 09:55:45 -07:00
Igor Canadi
9a6a0bd8c9 Style fix in compaction_job.cc
Summary: I didn't know this can work :)

Test Plan: none

Reviewers: sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42081
2015-07-15 09:36:47 +02:00
Andres Notzli
ddad40e930 Fixed nullptr deref and added assert
Summary:
Fixes two minor issues in CompactionJob.
CompactionJob::Run() dereferences log_buffer_ without a check, so
this patch adds an assert in the constructor where log_buffer_
is assigned. compaction_job_stats_ can be null but
ProcessKeyValueCompaction was dereferencing it without a check.

Test Plan: make && make check

Reviewers: sdong, rven, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42231
2015-07-14 23:12:34 -07:00
Yueh-Hsuan Chiang
801df912af Move UniversalCompaction related db-tests to db_universal_compaction_test.cc
Summary: Move UniversalCompaction related db-tests to db_universal_compaction_test.cc

Test Plan:
db_test
db_universal_compaction_test

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42225
2015-07-14 18:24:45 -07:00
Yueh-Hsuan Chiang
3ca6b2541e Move TailingIterator tests from db_test.cc to db_test_tailing_iterator.cc
Summary: Move TailingIterator tests from db_test.cc to db_test_tailing_iterator.cc

Test Plan:
db_test
db_test_tailing_iterator

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42021
2015-07-14 16:41:08 -07:00
Yueh-Hsuan Chiang
ce829c77e3 Make TransactionLogIterator related tests from db_test.cc to db_log_iter_test.cc
Summary: Make TransactionLogIterator related tests from db_test.cc to db_log_iter_test.cc

Test Plan:
db_test
db_log_iter_test

Reviewers: sdong, IslamAbdelRahman, igor, anthony

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42045
2015-07-14 16:08:21 -07:00
Yueh-Hsuan Chiang
c3f98bb89b Move CompactionFilter tests in db_test.cc to db_compaction_filter_test.cc
Summary: Move CompactionFilter tests in db_test.cc to db_compaction_filter_test.cc

Test Plan:
db_test
db_compaction_filter_test

Reviewers: igor, sdong, IslamAbdelRahman, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42207
2015-07-14 16:03:47 -07:00
agiardullo
18d5e1bf88 Remove db_impl_readonly dependency on utilities
Summary: Seems like the cleanest way to resolve this is to move CompactedDBImpl into db/.  CompactedDBImpl should probably live in the same place as DBImplReadonly since Opening the latter could end up instantiating the former.  Both DBImplReadonly and CompactedDBImpl inherit from DBImpl access protected members of DBImpl( and the latter access friendly private methods).

Test Plan: unit tests

Reviewers: sdong, yhchiang, kradhakrishnan, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42027
2015-07-14 11:32:54 -07:00
Islam AbdelRahman
49640bd82f Allow write_batch_test to run with ROCKSDB_LITE
Summary: Remove ColumnFamiliesBatchWithIndexTest from ROCKSDB_LITE since WriteBatchWithIndex is not supported

Test Plan: write_batch_test

Reviewers: yhchiang, sdong, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42033
2015-07-14 10:35:35 -07:00
Igor Canadi
a9c5109515 Deprecate purge_redundant_kvs_while_flush
Summary: This option is guarding the feature implemented 2 and a half years ago: D8991. The feature was enabled by default back then and has been running without issues. There is no reason why any client would turn this feature off. I found no reference in fbcode.

Test Plan: none

Reviewers: sdong, yhchiang, anthony, dhruba

Reviewed By: dhruba

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42063
2015-07-14 13:07:02 +02:00
Igor Canadi
5aea98ddd8 Deprecate WriteOptions::timeout_hint_us
Summary:
In one of our recent meetings, we discussed deprecating features that are not being actively used. One of those features, at least within Facebook, is timeout_hint. The feature is really nicely implemented, but if nobody needs it, we should remove it from our code-base (until we get a valid use-case). Some arguments:
* Less code == better icache hit rate, smaller builds, simpler code
* The motivation for adding timeout_hint_us was to work-around RocksDB's stall issue. However, we're currently addressing the stall issue itself (see @sdong's recent work on stall write_rate), so we should never see sharp lock-ups in the future.
* Nobody is using the feature within Facebook's code-base. Googling for `timeout_hint_us` also doesn't yield any users.

Test Plan: make check

Reviewers: anthony, kradhakrishnan, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: sdong, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41937
2015-07-14 09:35:48 +02:00
Andres Notzli
ae29495e4b Avoid manipulating const char* arrays
Summary:
We were manipulating `const char*` arrays in CompactionJob to
change the sequence number/types of keys. This patch changes
UpdateInternalKey() to use string methods to do the manipulation
and updates all calls accordingly.

Test Plan:
Added test case for UpdateInternalKey() in dbformat_test.
make && make check

Reviewers: sdong, rven, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41985
2015-07-14 00:21:41 -07:00
Andres Notzli
ab137af4ba Partial cleanup of CompactionJob
Summary:
Logging, dealing with key prefix batches and updating stats
moved from CompactionJob::Run() into separate functions.

Test Plan: make all && make check

Reviewers: sdong, rven, yhchiang, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41919
2015-07-14 00:09:20 -07:00
Yueh-Hsuan Chiang
b10cf4e2e0 Move DynamicLevel related db-tests to db_dynamic_level_test.cc
Summary: Move DynamicLevel related db-tests to db_dynamic_level_test.cc

Test Plan:
db_dynamic_level_test
db_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D42039
2015-07-13 19:00:30 -07:00
Islam AbdelRahman
e290f5d3ce Block reduce_levels_test in ROCKSDB_LITE
Summary: Block reduce_levels_test in ROCKSDB_LITE as LDBCommand is not supported

Test Plan:
make reduce_levels_test -j64
OPT=-DROCKSDB_LITE make reduce_levels_test -j64
make check -j64

Reviewers: sdong, igor, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41967
2015-07-13 18:45:55 -07:00
Yueh-Hsuan Chiang
49f42ad032 Move global static functions in db_test_util to DBTestBase
Summary:
Move global static functions in db_test_util to DBTestBase.
This is to prevent unused function warning when decoupling
db_test.cc into multiple files.

Test Plan: db_test

Reviewers: igor, sdong, anthony, IslamAbdelRahman, kradhakrishnan

Reviewed By: kradhakrishnan

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42009
2015-07-13 17:41:41 -07:00
Yueh-Hsuan Chiang
625467a08a Move reusable part of db_test.cc to util/db_test_util.h
Summary:
Move reusable part of db_test.cc to util/db_test_util.h.
This makes it more possible to partition db_test.cc into
multiple smaller test files.

Also, fixed many old lint errors in db_test.

Test Plan: db_test

Reviewers: igor, anthony, IslamAbdelRahman, sdong, kradhakrishnan

Reviewed By: sdong, kradhakrishnan

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41973
2015-07-13 16:53:38 -07:00
Ari Ekmekji
8bca83e5dd Add tombstone information in CompactionJobStats
Summary:
Added new statistics in CompactionJobStats to keep track of
deletion entries and the expiration of those entries. Updated these
fields in compaction_job.cc as compaction took place and wrote a new
test in compaction_job_stats_test.cc to verify accuracy.

Test Plan:
Wrote new test DeletionStatsTest in
compaction_job_stats_test.cc to verify

Reviewers: sdong, igor, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41355
2015-07-13 15:51:38 -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
sdong
5fd11853cb Print Fast CRC32 support information in DB LOG
Summary: Print whether fast CRC32 is supported in DB info LOG

Test Plan: Run db_bench and see it prints out correctly.

Reviewers: yhchiang, anthony, kradhakrishnan, igor

Reviewed By: igor

Subscribers: MarkCallaghan, yoshinorim, leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41733
2015-07-10 17:59:36 -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
krad
7189e90c22 Fix a noisy unit test.
Summary: The t/DBTest.DropWrites test still fails under certain gcc version in release unit test.

I unfortunately cannot repro the failure (since the compilers have mapped library which I am not able to map to correctly). I am suspecting the clock skew.

Test Plan: Run make check

Reviewers:

CC: sdong igore

Task ID: #7312624

Blame Rev:
2015-07-09 13:43:52 -07:00
Aaron Feldman
1f4d565709 Add db_bench flag to set cache_index_and_filter_blocks
Summary:
The new flag --cache_index_and_filter_blocks sets
BlockBasedTableOptions.cache_index_and_filter_blocks

Test Plan: make db_bench. Working on benchmarks with the new flag.

Reviewers: igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41481
2015-07-09 13:36:16 -07:00
Dmitri Smirnov
d8586ab22b All of these are in the new code added past 3.10
1) Crash in env_win.cc that prevented db_test run to completion and some new tests
     2) Fix new corruption tests in DBTest by allowing a shared trunction of files. Note that this is generally needed ONLY for tests.
     3) Close database so WAL is closed prior to inducing corruption similar to what we did within Corruption tests.
2015-07-08 16:56:45 -07:00
Poornima Chozhiyath Raman
4bed00a44b Fix function name format according to google style
Summary: Change the naming style of getter and setters according to Google C++ style in compaction.h file

Test Plan: Compilation success

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D41265
2015-07-08 15:21:10 -07:00
krad
e2e3d84b2c Added multi WAL log testing to recovery tests.
Summary: Currently there is no test in the suite to test the case where
there are multiple WAL files and there is a corruption in one of them. We have
tests for single WAL file corruption scenarios. Added tests to mock
the scenarios for all combinations of recovery modes and corruption in
specified file locations.

Test Plan: Run make check

Reviewers: sdong igor

CC: leveldb@

Task ID: #7501229

Blame Rev:
2015-07-08 14:39:00 -07:00
Dmitri Smirnov
ef4b87f1b2 Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00
agiardullo
4f56632b16 Fix occasional failure in compaction_job_test
Summary: Coverage test has been occasionally failing due to this timing check.

Test Plan: run test

Reviewers: yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41367
2015-07-07 16:10:23 -07:00
Poornima Chozhiyath Raman
411c8e3d19 Build fail fix
Summary: Build fail fix. Type cast issues.

Test Plan: compiled

Reviewers: sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41349
2015-07-07 15:21:17 -07:00
Poornima Chozhiyath Raman
c0b23dd5b0 Enabling trivial move in universal compaction
Summary: This change enables trivial move if all the input files are non onverlapping while doing Universal Compaction.

Test Plan: ./compaction_picker_test and db_test ran successfully with the new testcases.

Reviewers: sdong

Reviewed By: sdong

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D40875
2015-07-07 14:18:55 -07:00
Yueh-Hsuan Chiang
d8e3e766f9 Fixed a bug in test ThreadStatusSingleCompaction
Summary:
Fixed a bug in test ThreadStatusSingleCompaction where
SyncPoint traces are not cleared before the test begins
its second iteration.

Test Plan: db_test

Reviewers: sdong, anthony, IslamAbdelRahman, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41337
2015-07-07 14:00:03 -07:00
Yueh-Hsuan Chiang
4ce5be4255 fixed leaking log::Writers
Summary: Fixes valgrind errors in column_family_test.

Test Plan: `make check`, `make valgrind_check`

Reviewers: igor, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D41181
2015-07-07 12:10:10 -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
Andres Notzli
58d7ab3c68 Added tests for ExpandWhileOverlapping()
Summary:
This patch adds three test cases for ExpandWhileOverlapping()
to the compaction_picker_test test suite.
ExpandWhileOverlapping() only has an effect if the comparison
function for the internal keys allows for overlapping user
keys in different SST files on the same level. Thus, this
patch adds a comparator based on sequence numbers to
compaction_picker_test for the new test cases.

Test Plan:
- make compaction_picker_test && ./compaction_picker_test
  -> All tests pass
- Replace body of ExpandWhileOverlapping() with `return true`
  -> Compile and run ./compaction_picker_test as before
  -> New tests fail

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

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41277
2015-07-06 22:25:27 -07:00
Igor Canadi
155ce60daf Fix compaction_job_test
Summary:
Two issues:
* the input keys to the compaction don't include sequence number.
* sequence number is set to max(seq_num), but it should be set to max(seq_num)+1, because the condition here is strictly-larger (i.e. we will only zero-out sequence number if the DB's sequence number is strictly greater than the key's sequence number): https://github.com/facebook/rocksdb/blob/master/db/compaction_job.cc#L830

Test Plan: make compaction_job_test && ./compaction_job_test

Reviewers: sdong, lovro

Reviewed By: lovro

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D41247
2015-07-06 11:14:08 -07:00
Dmitri Smirnov
d2f0912bd3 Merge the latest changes from github/master 2015-07-02 17:23:41 -07:00
Mike Kolupaev
218487d8dc [wal changes 1/3] fixed unbounded wal growth in some workloads
Summary:
This fixes the following scenario we've hit:
 - we reached max_total_wal_size, created a new wal and scheduled flushing all memtables corresponding to the old one,
 - before the last of these flushes started its column family was dropped; the last background flush call was a no-op; no one removed the old wal from alive_logs_,
 - hours have passed and no flushes happened even though lots of data was written; data is written to different column families, compactions are disabled; old column families are dropped before memtable grows big enough to trigger a flush; the old wal still sits in alive_logs_ preventing max_total_wal_size limit from kicking in,
 - a few more hours pass and we run out disk space because of one huge .log file.

Test Plan: `make check`; backported the new test, checked that it fails without this diff

Reviewers: igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D40893
2015-07-02 14:27:00 -07:00
Dmitri Smirnov
9dbde7277c Merge remote-tracking branch 'origin' into ms_win_port 2015-07-02 11:34:22 -07:00