Commit Graph

4611 Commits

Author SHA1 Message Date
sdong
622456584d Add some include<functional> 2019-10-31 14:32:48 -07:00
sdong
4887a3f680 [FB Internal] Point to the latest tool chain. 2019-10-31 14:32:48 -07:00
sdong
bcf926b664 [fb only] revert unintended change of USE_SSE
The previuos change that use gcc-5 set USE_SSE to wrong flag by mistake. Fix it.
2017-07-17 22:21:24 -07:00
sdong
e0ff529d5d [FB Only] use gcc-5 2017-07-17 21:39:43 -07:00
Islam AbdelRahman
bcaf392114 backport fbcode gcc path fix 2016-06-08 12:50:09 -07:00
agiardullo
b8c78da6ed update fb-specific dependencies by running update_dependencies.sh 2016-02-18 15:13:33 -08:00
Islam AbdelRahman
5dac6ba2dc Update fbcode_config4.8.1.sh to use update_dependencies.sh
Summary:
This patch update fbcode_config4.8.1.sh to get it's dependencies the same way we updated fbcode_config.sh in D53037

as a result zstd is upgraded to 0.4.7 instead of 0.4.5

Test Plan:
make clean && ROCKSDB_FBCODE_BUILD_WITH_481=1 make check -j64
make clean && ROCKSDB_FBCODE_BUILD_WITH_481=1 USE_CLANG=1 make check -j64

Reviewers: yhchiang, andrewkr, rven, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53355

(cherry picked from commit 77ef87ccb0)
2016-02-18 15:12:29 -08:00
Islam AbdelRahman
61d6cab888 Include rest of dependencies in dependencies.sh
Summary:
This diff

  - Include the rest of the dependencies (kernel-headers, binutils, valgrind) in dependencies.sh
  - updtade zst to 0.4.7
  - It also fix a problem in clang scan build

Test Plan:
make check
USE_CLANG=1 make check
USE_CLANG=1 make analyze
coverage_test.sh

Reviewers: sdong, yhchiang, rven, andrewkr, kradhakrishnan

Reviewed By: kradhakrishnan

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53301

(cherry picked from commit f7ef1a6132)
2016-02-18 15:11:14 -08:00
Islam AbdelRahman
26a2fb1cea Update fbcode_config.sh to use latest versions automatically
Summary:
Update fbcode_config.sh so that It try to use the latest version for dependencies that we are using, after updating the code these libraries where updated

```
Snappy: 1.0.3 => 1.1.3
GFLAGS: 1.6 => 2.1.1
JEMALLOC: 3.6.0 => 4.0.3
```

I have also updated clang from 3.7 to 3.7.1

```
Clang 3.7 => 3.7.1
```

Another change is that we use the same tp2 directory as fbcode, so we dont need to keep changing commit hash every time we need to change a version of a compiler or a library

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

DISABLE_JEMALLOC=1 OPT=-g make all valgrind_check -j32 (make sure it's running)

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

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53037

(cherry picked from commit 538eec0661)
2016-02-18 15:11:01 -08:00
agiardullo
41eb08a960 update build version to 4.4.1
Summary: prepare to release 4.4.1

Test Plan: unit tests pass

Reviewers: kradhakrishnan, IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D54393
2016-02-18 14:40:13 -08:00
agiardullo
e7708343f3 Fix transaction locking
Summary: Broke transaction locking in 4.4 in D52197.  Will cherry-pick this change into 4.4 (which hasn't yet been fully released).  Repro'd using db_bench.

Test Plan: unit tests and db_Bench

Reviewers: sdong, yhchiang, kradhakrishnan, ngbronson

Reviewed By: ngbronson

Subscribers: ngbronson, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D54021

(cherry picked from commit d08d50295c)
2016-02-18 13:37:45 -08:00
Yueh-Hsuan Chiang
dbffb828fa Remove the SyncPoint usage in the destructor of PosixEnv
Summary:
Remove the SyncPoint usage in the destructor of PosixEnv as none
of any active tests is using it.

SyncPoint is a test-only utility class, and it's a static varible.
As a result, using SyncPoint in the destructor of PosixEnv will
make default Env depends on SyncPoint.  Removing such dependency
could solve the problem crash issue only reproducable in Mac
environment.

Test Plan: OPT=-DTRAVIS V=1 make -j4 check on Mac environment

Reviewers: sdong, anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D54333
2016-02-18 00:47:36 -08:00
Yueh-Hsuan Chiang
2ed9b9206b Add missing SyncPoint::DisableProcessing in compact_file_test
Summary: Add missing SyncPoint::DisableProcessing in compact_file_test

Test Plan: compact_file_test

Reviewers: anthony, sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D54327
2016-02-17 23:21:58 -08:00
Yueh-Hsuan Chiang
4860bfdeab Fixed a dependency issue of ThreadLocalPtr
Summary:
When a child thread that uses ThreadLocalPtr, ThreadLocalPtr::OnThreadExit
will be called when that child thread is destroyed.  However,
OnThreadExit will try to access a static singleton of ThreadLocalPtr,
which will be destroyed when the main thread exit.  As a result,
when a child thread that uses ThreadLocalPtr exits AFTER the main thread
exits, illegal memory access will occur.

This diff includes a test that reproduce this legacy bug.

    ==2095206==ERROR: AddressSanitizer: heap-use-after-free on address
    0x608000007fa0 at pc 0x959b79 bp 0x7f5fa7426b60 sp 0x7f5fa7426b58
    READ of size 8 at 0x608000007fa0 thread T1

This patch fix this issue by having the thread local mutex never be deleted
(but will leak small piece of memory at the end.)   The patch also describe
a better solution (thread_local) in the comment that requires gcc 4.8.1 and
in latest clang as a future work once we agree to move toward gcc 4.8.

Test Plan:
COMPILE_WITH_ASAN=1 make thread_local_test -j32
./thread_local_test --gtest_filter="*MainThreadDiesFirst"

Reviewers: anthony, hermanlee4, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D53013
2016-02-10 16:56:21 -08:00
sdong
74bcf18772 Fix LITE db_test build broken by previous commit
Summary: Previous commit introduces a test that is not supported in LITE. Fix it.

Test Plan: Build the test with ROCKSDB_LITE.

Reviewers: kradhakrishnan, IslamAbdelRahman, anthony, yhchiang, andrewkr

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D53901
2016-02-05 15:36:25 -08:00
sdong
18a4f6a1de Explictly fail when memtable doesn't support concurrent insert
Summary: If users turn on concurrent insert but the memtable doesn't support it, they might see unexcepted crash. Fix it by explicitly fail.

Test Plan:
Run different setting of stress_test and make sure it fails correctly.
Will add a unit test too.

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

Reviewed By: ngbronson

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D53895
2016-02-05 15:35:37 -08:00
sdong
f300da40d0 Fix merge erorr in previous cherry-pick 2016-02-05 09:03:59 -08:00
Nathan Bronson
b8f656767a always invalidate sequential-insertion cache for concurrent skiplist adds
Summary:
InlineSkipList::InsertConcurrently should invalidate the
sequential-insertion cache prev_[] for all inserts of multi-level nodes,
not just those that increase the height of the skip list.  The invariant
for prev_ is that prev_[i] (i > 0) is supposed to be the predecessor of
prev_[0] at level i.  Before this diff InsertConcurrently could violate
this constraint when inserting a multi-level node after prev_[i] but
before prev_[0].

This diff also reenables kConcurrentSkipList as db_test's
MultiThreaded/MultiThreadedDBTest.MultiThreaded/29.

Test Plan:
1. unit tests
2. temporarily hack kConcurrentSkipList timing so that it is fast but has a 1.5% failure rate on my dev box (1ms stagger on thread launch, 1s test duration, failure rate baseline over 1000 runs)
3. observe 1000 passes post-fix

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: MarkCallaghan, dhruba

Differential Revision: https://reviews.facebook.net/D53751
2016-02-04 14:21:27 -08:00
Nathan Bronson
fab086daa1 Fix for --allow_concurrent_memtable_write with batching
Summary:
Concurrent memtable adds were incorrectly computing
the last sequence number for a write batch group when the
write batches were not solitary.  This is the cause of
https://github.com/facebook/mysql-5.6/issues/155

Test Plan:
1. unit tests
2. new unit test
3. parallel db_bench stress tests with batch size of 10 and asserts enabled

Reviewers: igor, sdong

Reviewed By: sdong

Subscribers: IslamAbdelRahman, MarkCallaghan, dhruba

Differential Revision: https://reviews.facebook.net/D53595
2016-02-04 14:19:34 -08:00
sdong
f9a3440b76 Should not skip bloom filter for L0 during the query.
Summary: It's a regression bug caused by e089db40f9. With the change, if options.optimize_filters_for_hits=true and there are only L0 files (like single level universal compaction), we skip all the files in L0, which is more than necessary. Fix it by always trying to query bloom filter for files in level 0.

Test Plan: Add a unit test for it.

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

Reviewed By: andrewkr

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D53493
2016-01-27 16:17:02 -08:00
Islam AbdelRahman
3bbf0e1e4f Fix issue in Iterator::Seek when using Block based filter block with prefix_extractor
Summary: Similar to D53385 we need to check InDomain before checking the filter block.

Test Plan: unit tests

Reviewers: yhchiang, rven, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53421
2016-01-27 15:55:22 -08:00
Islam AbdelRahman
0be02649d8 Fix bug in block based tables with full filter block and prefix_extractor
Summary:
Right now when we are creating a BlockBasedTable with fill filter block
we add to the filter all the prefixes that are InDomain() based on the prefix_extractor

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

Test Plan: unit tests

Reviewers: yhchiang, rven, anthony, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D53385
2016-01-27 15:55:02 -08:00
agiardullo
f7ebc2f346 Update HISTORY.mc for 4.4.0
Summary: Prepare to cut release

Test Plan: no code change.

Reviewers: yhchiang

Reviewed By: yhchiang

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52827
2016-01-14 16:57:06 -08:00
Siying Dong
addd9545f8 Merge pull request #947 from yuslepukhin/align_and_yield
Align statistics
2016-01-14 10:28:40 -08:00
Dmitri Smirnov
ac50fd3a71 Align statistics
Use Yield macro to make it a little more portable between platforms.
2016-01-13 14:53:23 -08:00
sdong
b54d4dd435 tools/sst_dump_tool_imp.h not to depend on "util/testutil.h"
Summary:
util/testutil.h doesn't seem to be used in tools/sst_dump_tool_imp.h. Remove it.
Also move some other include to tools/sst_dump_tool.cc instead.

Test Plan: Build with GCC, CLANG and with GCC 4.81 and 4.9.

Reviewers: yuslepukhin, yhchiang, rven, anthony, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52791
2016-01-13 11:34:53 -08:00
Igor Canadi
48a8667c30 Merge pull request #929 from warrenfalk/fix32
fix a compile error on 32-bit (fixes #634)
2016-01-12 11:02:36 -08:00
Islam AbdelRahman
d9bca1e14c Reduce iterator deletion overhead
Summary:
After introducing Iterator::PinData(), we have extra overhead of deleting the pinned iterators that we track in a std::set
This patch avoid inserting to the std::set if we have only one iterator (normal use case when no iterators are pinned)

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

After change

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

Test Plan: make check -j64

Reviewers: yhchiang, rven, anthony, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52761
2016-01-11 16:48:15 -08:00
Igor Canadi
45d794068c Merge pull request #940 from yuslepukhin/fix_windows_build_signed_unsigned
Fix compile error.
2016-01-11 16:16:17 -08:00
Dmitri Smirnov
20d7902df9 Fix compile error.
Use constructor style initialization instead of a cast for
  simplicity.
2016-01-11 16:10:48 -08:00
dhruba borthakur
1477dcb37d Merge pull request #937 from petehunt/master
Add Smyte to USERS.md
2016-01-10 01:56:04 -08:00
Pete Hunt
c7cb1076a6 Add Smyte to USERS.md 2016-01-09 14:11:44 -08:00
sdong
df7e3b6229 Include <array> in table/plain_table_key_coding.h
Summary: <array> is not included in table/plain_table_key_coding.h. It may be the cause of one CLANG build failure.

Test Plan: Build it

Reviewers: yhchiang, rven, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52725
2016-01-08 17:34:53 -08:00
sdong
235b162be1 Not scheduling more L1->L2 compaction if L0->L1 is pending with higher priority
Summary: When L0->L1 is pending, there may be one L1->L2 compaction going on which prevents the L0->L1 compaction from happening. If L1 needs more data to be moved to L2, then we may continue scheduling more L1->L2 compactions. The end result may be that L0->L1 compaction will not happen until L1 size drops to below target size. We can reduce the stalling because of number of L0 files by stopping schedling new L1->L2 compaction when L0's score is higher than L1.

Test Plan: Run all existing tests.

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

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52401
2016-01-08 13:56:57 -08:00
sdong
9a8e3f73ed plain table reader: non-mmap mode to keep two recent buffers
Summary: In plain table reader's non-mmap mode, we only keep the most recent read buffer. However, for binary search, it is likely we come back to a location to read. To avoid one pread in such a case, we keep two read buffers. It should cover most of the cases.

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

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

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D51171
2016-01-08 10:53:57 -08:00
Venkatesh Radhakrishnan
7ece10ecb6 DeleteFilesInRange: Mark files to be deleted as being compacted before applying change
Summary:
While running the myrocks regression suite, I found that while
dropping a table soon after inserting rows into it resulted in an
assertion failure in CheckConsistencyForDeletes for not finding
a file which was recently added or moved. Marking the files to be
deleted as being compacted before calling LogAndApplyChange
fixed the assertion failures.

Test Plan: DBCompactionTest.DeleteFileRange

Reviewers: IslamAbdelRahman, anthony, yhchiang, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba, yoshinorim, leveldb

Differential Revision: https://reviews.facebook.net/D52599
2016-01-07 14:48:45 -08:00
Warren Falk
94d9df2482 fix an unused function compiler warning in crc32c in 32-bit mode 2016-01-07 13:27:20 -05:00
Warren Falk
2f01e10fa9 use static_cast in crc32c instead of c-style cast 2016-01-07 13:22:09 -05:00
Warren Falk
601f1306a1 fix shorten-64-to-32 warning in crc32c 2016-01-07 13:12:15 -05:00
Islam AbdelRahman
f3fb39814d Fix BlockBasedTableTest.NoopTransformSeek failure
Summary:
table_test is failing because we are creating a temp InternalComparator

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

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

Reviewers: igor, sdong, anthony, rven

Reviewed By: rven

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D52671
2016-01-07 09:48:29 -08:00
Warren Falk
55b37efa15 fix a compile error on 32-bit 2016-01-07 11:51:52 -05:00
Islam AbdelRahman
8c71eb5afc Optimize DBIter::Prev() by reducing stack overhead
Summary:
It looks like we are spending significant amount of time creating std::deque<std::string> every time we do Iterator::Prev()

{F921567}

By using merge_operands_ as a DBIter data member w create it once and reduce this overhead and see ~30% performance improvement when using Iterator::Prev() on hot data

Orignal performance

```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readreverse" --db="/dev/shm/bench_prev_opt/" --use_existing_db --disable_auto_compactions
readreverse  :       0.713 micros/op 1402219 ops/sec;  155.1 MB/s
readreverse  :       0.609 micros/op 1641386 ops/sec;  181.6 MB/s
readreverse  :       0.684 micros/op 1461150 ops/sec;  161.6 MB/s
readreverse  :       0.629 micros/op 1589842 ops/sec;  175.9 MB/s
readreverse  :       0.647 micros/op 1544530 ops/sec;  170.9 MB/s
```

After optimization

```
DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readreverse" --db="/dev/shm/bench_prev_opt/" --use_existing_db --disable_auto_compactions
readreverse  :       0.488 micros/op 2051189 ops/sec;  226.9 MB/s
readreverse  :       0.505 micros/op 1980892 ops/sec;  219.1 MB/s
readreverse  :       0.541 micros/op 1846971 ops/sec;  204.3 MB/s
readreverse  :       0.497 micros/op 2013612 ops/sec;  222.8 MB/s
readreverse  :       0.480 micros/op 2082665 ops/sec;  230.4 MB/s
```

Test Plan: make check -j64

Reviewers: sdong, anthony, rven, igor, yhchiang

Reviewed By: yhchiang

Subscribers: jkedgar, dhruba

Differential Revision: https://reviews.facebook.net/D52563
2016-01-07 07:59:14 -08:00
Yueh-Hsuan Chiang
73c31377bb Revert "Fixed the bug when both whole_key_filtering and prefix_extractor are set."
Summary:
This patch reverts commit 57605d7ef3 as it will
cause BlockBasedTableTest.NoopTransformSeek test crashes in some environment.

Test Plan: revert the patch

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Subscribers: dhruba, leveldb

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

Test Plan: Add a test in table_test

Reviewers: anthony, IslamAbdelRahman, rven, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52233
2016-01-06 23:01:23 -08:00
Yueh-Hsuan Chiang
6935eb24e0 Add ColumnFamilyHandle::GetDescriptor()
Summary:
This patch addes ColumnFamilyHandle::GetDescriptor(), which allows
developers to obtain the CF options and names of the associated column
family given its handle.

  // Returns the up-to-date descriptor used by the current handle.  Since it
  // returns the up-to-date information, this call might internally locks
  // and releases DB mutex to access the up-to-date CF options.
  virtual ColumnFamilyDescriptor GetDescriptor() = 0;

Test Plan: augment column_family_test

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

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D51543
2016-01-06 18:14:01 -08:00
agiardullo
9760c842ce fix valgrind failure in backupable_db_test
Summary: fix memory leak in test code

Test Plan: ran test

Reviewers: rven, igor, sdong

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52617
2016-01-06 18:04:58 -08:00
Gunnar Kudrjavets
b1a3b4c0d0 Make ldb automagically determine the file type and use the correct dumping function
Summary:
This set of changes implements the following design: `ldb` will utilize `--path` parameter which can be used to specify a file name. Tool will then apply some heuristic to determine how to output the data properly. The design decision is not to probe the file content, but use file names to determine what dumping function to call.

Usage examples:

Understands that path points to a manifest file and dumps it.
`./ldb --path=/tmp/test_db/MANIFEST-000023 dump`

Understands that path points to a WAL file and dumps it.
`./ldb --path=/tmp/test_db/000024.log dump --header`

Understands that path points to a SST file and dumps it.
`./ldb --path=/tmp/test_db/000007.sst dump`

Figures out that none of the supported file types are applicable and outputs
an appropriate error message.
`./ldb --path=/tmp/cron.log dump`

Test Plan:
Basics:

git diff
make clean
make -j 32 commit-prereq
arc lint

More specific testing (done as part of commit-prereq, but can be iterated separately when making isolated changes):

make clean
make ldb
python tools/ldb_test.py
make rocksdb_dump
make rocksdb_undump
sh tools/rocksdb_dump_test.sh

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

Reviewed By: sdong

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D52269
2016-01-06 14:19:08 -08:00
Igor Canadi
ba83447363 Merge pull request #923 from petermattis/pmattis/prefix-may-match
Fix index seeking in BlockTableReader::PrefixMayMatch.
2016-01-06 14:02:10 -08:00
Reid Horuff
da032495d3 Optimize GetLatestSequenceForKey
Summary: DBImpl::GetLatestSequenceForKey() can do memcpy's to load a value that will never be used.  This can be optimized by changing all the Get() functions called to optionally not fetch the value (and only fetch the sequencenumber).

Test Plan: optimistic_transaction_test and transaction_test

Reviewers: anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba, hermanlee4

Differential Revision: https://reviews.facebook.net/D52227
2016-01-06 13:43:22 -08:00
Peter Mattis
260c29762a Fix index seeking in BlockTableReader::PrefixMayMatch.
PrefixMayMatch previously seeked in the prefix index using an internal
key with a sequence number of 0. This would cause the prefix index seek
to fall off the end if the last key in the index had a user-key greater
than or equal to the key being looked for. Falling off the end of the
index in turn results in PrefixMayMatch returning false if the index is
in memory.
2016-01-06 16:39:56 -05:00