Commit Graph

6492 Commits

Author SHA1 Message Date
Sergey Makarenko
1c80dfab24 Print memory allocation counters
Summary:
Introduced option to dump malloc statistics using new option flag.
    Added new command line option to db_bench tool to enable this
    funtionality.
    Also extended build to support environments with/without jemalloc.

Test Plan:
1) Build rocksdb using `make` command. Launch the following command
    `./db_bench --benchmarks=fillrandom --dump_malloc_stats=true
    --num=10000000` end verified that jemalloc dump is present in LOG file.
    2) Build rocksdb using `DISABLE_JEMALLOC=1  make db_bench -j32` and ran
    the same db_bench tool and found the following message in LOG file:
    "Please compile with jemalloc to enable malloc dump".
    3) Also built rocksdb using `make` command on MacOS to verify behavior
    in non-FB environment.
    Also to debug build configuration change temporary changed
    AM_DEFAULT_VERBOSITY = 1 in Makefile to see compiler and build
    tools output. For case 1) -DROCKSDB_JEMALLOC was present in compiler
    command line. For both 2) and 3) this flag was not present.

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57321
2016-04-27 16:23:33 -07:00
Islam AbdelRahman
eb73980853 Fix BackupableDBTest
Summary: Fix BackupableDBTest.NoDoubleCopy and BackupableDBTest.DifferentEnvs by mocking the db files in db_env instead of backup_env_

Test Plan: make check -j64

Reviewers: sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57273
2016-04-26 16:07:04 -07:00
sdong
ac0e54b4c6 CompactedDB should not be used if there is outstanding WAL files
Summary: CompactedDB skips memtable. So we shouldn't use compacted DB if there is outstanding WAL files.

Test Plan: Change to options.max_open_files = -1 perf context test to create a compacted DB, which we shouldn't do.

Reviewers: yhchiang, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57057
2016-04-26 14:22:07 -07:00
Islam AbdelRahman
d719b095dc Introduce PinnedIteratorsManager (Reduce PinData() overhead / Refactor PinData)
Summary:
While trying to reuse PinData() / ReleasePinnedData() .. to optimize away some memcpys I realized that there is a significant overhead for using PinData() / ReleasePinnedData if they were called many times.
This diff refactor the pinning logic by introducing PinnedIteratorsManager a centralized component that will be created once and will be notified whenever we need to Pin an Iterator. This implementation have much less overhead than the original implementation

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

Reviewers: yhchiang, sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56493
2016-04-26 12:41:07 -07:00
Andrew Kryczka
1995e34d6a Retrieve file size from proper Env
Summary:
When db_env_ != backup_env_, InsertPathnameToSizeBytes() would
use the wrong Env during backup creation. This happened because this function
used backup_env_ instead of db_env_ to get WAL/data file sizes.

This diff adds an argument to InsertPathnameToSizeBytes() indicating which Env
to use.

Test Plan: ran @anirbanb's BackupTestTool

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D57159
2016-04-26 12:33:30 -07:00
Islam AbdelRahman
7c14abf2c7 Improve BytewiseComparatorImpl::FindShortestSeparator
Summary:
The current implementation find the first different byte and try to increment it, if it cannot it return the original key
we can improve this by keep going after the first different byte to find the first non 0xFF byte and increment it

After trying this patch on some logdevice sst files I see decrease in there index block size by 8.5%

Test Plan: existing tests and updated test

Reviewers: yhchiang, andrewkr, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56241
2016-04-25 23:02:14 -07:00
Islam AbdelRahman
f3eb0b5b8c Make EventListenerTest.CompactionReasonLevel more deterministic
Summary:
In this test some times automatic compactions do everything and Manual compaction become a no-op.
Update the test to make sure manual compaction is not a no-op

Test Plan: run the test

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57189
2016-04-25 18:18:35 -07:00
sdong
7b78d623f7 Shouldn't report default column family's compaction stats as DB compaction stats
Summary:
Now we collect compaction stats per column family, but report default colum family's stat as compaction stats for DB.
Fix it by reporting compaction stats per column family instead.

Test Plan: Run db_bench with --num_column_families=4 and see the number fixed.

Reviewers: IslamAbdelRahman, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57063
2016-04-25 13:56:59 -07:00
Dhruba Borthakur
995353e46a Fix null-pointer-dereference detected by Infer (https://github.com/facebook/infer)
Test Plan: make check

Reviewers: leveldb, sdong

Reviewed By: sdong

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57165
2016-04-25 20:09:36 +01:00
Yueh-Hsuan Chiang
24110ce90c Correct Statistics FLUSH_WRITE_BYTES
Summary:
In https://reviews.facebook.net/D56271, we fixed an issue where
we consider flush as compaction.  However, that makes us mistakenly
count FLUSH_WRITE_BYTES twice (one in flush_job and one in db_impl.)

This patch removes the one incremented in db_impl.

Test Plan: db_test

Reviewers: yiwu, andrewkr, IslamAbdelRahman, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D57111
2016-04-25 12:01:01 -07:00
dx9
b71c4e613f Alpine Linux Build (#990)
* Musl libc does not provide adaptive mutex. Added feature test for PTHREAD_MUTEX_ADAPTIVE_NP.

* Musl libc does not provide backtrace(3). Added a feature check for backtrace(3).

* Fixed compiler error.

* Musl libc does not implement backtrace(3). Added platform check for libexecinfo.

* Alpine does not appear to support gcc -pg option. By default (gcc has PIE option enabled) it fails with:

gcc: error: -pie and -pg|p|profile are incompatible when linking

When -fno-PIE and -nopie are used it fails with:

/usr/lib/gcc/x86_64-alpine-linux-musl/5.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find gcrt1.o: No such file or directory

Added gcc -pg platform test and output PROFILING_FLAGS accordingly. Replaced pg var in Makefile with PROFILING_FLAGS.

* fix segfault when TEST_IOCTL_FRIENDLY_TMPDIR is undefined and default candidates are not suitable

* use ASSERT_DOUBLE_EQ instead of ASSERT_EQ

* When compiled with ROCKSDB_MALLOC_USABLE_SIZE UniversalCompactionFourPaths and UniversalCompactionSecondPathRatio tests fail due to premature memtable flushes on systems with 16-byte alignment. Arena runs out of block space before GenerateNewFile() completes.

Increased options.write_buffer_size.
2016-04-22 16:49:12 -07:00
Igor Canadi
90ffed1f93 Update USERS.md with link to LinkedIn blog post (#1088) 2016-04-22 15:53:32 -07:00
Naitik Shah
99a3bf8f62 Merge pull request #1068 from daaku/c-purge-old-backups
rocksdb_backup_engine_purge_old_backups for C libraries
2016-04-22 13:49:59 -07:00
PraveenSinghRao
b54c347424 Use async file handle for better parallelism (#1049) 2016-04-22 13:27:33 -07:00
Naitik Shah
c146c9be18 rocksdb_create_mem_env to allow C libraries to create mem env (#1066) 2016-04-22 13:25:05 -07:00
Naitik Shah
6da70c5815 expose more options in the c api (#1067) 2016-04-22 13:24:09 -07:00
Naitik Shah
6f01687aae C rocksdb_create_iterators to expose NewIterators (#1069) 2016-04-22 13:22:21 -07:00
Yueh-Hsuan Chiang
644f978c18 Fix RocksDB Lite build in db_stress
Summary: Fix RocksDB Lite build in db_stress

Test Plan: OPT=-DROCKSDB_LITE db_stress

Reviewers: IslamAbdelRahman, kradhakrishnan, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D57045
2016-04-21 14:47:23 -07:00
Islam AbdelRahman
5bd4022fec Add comparator, merge operator, property collectors to SST file properties (again)
Summary:
This is the original diff that I have landed and reverted and now I want to land again https://reviews.facebook.net/D34269

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

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

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

Test Plan: unittests

Reviewers: andrewkr, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56487
2016-04-21 10:16:28 -07:00
Andrew Kryczka
7a6045a3c7 fix typo in HISTORY.md 2016-04-20 18:53:37 -07:00
Andrew Kryczka
73a847ef89 Add per-level compression ratio property
Summary:
This is needed so we can measure compression ratio improvements
achieved by D52287.

The property compares raw data size against the total file size for a given
level. If the level is empty it should return 0.0.

Test Plan: new unit test

Reviewers: IslamAbdelRahman, yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56967
2016-04-20 18:46:54 -07:00
Dmitri Smirnov
ee221d2de0 Introduce XPRESS compresssion on Windows. (#1081)
Comparable with Snappy on comp ratio.
  Implemented using Windows API, does not require external package.
  Avaiable since Windows 8 and server 2012.
  Use -DXPRESS=1 with CMake to enable.
2016-04-19 22:54:24 -07:00
flabby
874c96ac1d Merge pull request #1083 from flabby/master
fix typo  in comment of options.h
2016-04-19 14:51:24 -07:00
Yueh-Hsuan Chiang
6cbffd50d0 Enable testing CompactFiles in db_stress
Summary:
Enable testing CompactFiles in db_stress by adding flag test_compact_files
to db_stress.

Test Plan:
./db_stress --test_compact_files=1 --compaction_style=0 --allow_concurrent_memtable_write=false --ops_per_thread=100000
./db_stress --test_compact_files=1 --compaction_style=1 --allow_concurrent_memtable_write=false --ops_per_thread=100000

Sample output (note that it's normal to have some CompactFiles() failed):
    Stress Test : 491.891 micros/op 65054 ops/sec
                : Wrote 21.98 MB (0.45 MB/sec) (45% of 3200352 ops)
                : Wrote 1440728 times
                : Deleted 441616 times
                : Single deleted 38181 times
                : 319251 read and 19025 found the key
                : Prefix scanned 640520 times
                : Iterator size sum is 9691415
                : Iterated 319704 times
                : Got errors 0 times
                : 1323 CompactFiles() succeed
                : 32 CompactFiles() failed
    2016/04/11-15:50:58  Verification successful

Reviewers: sdong, IslamAbdelRahman, kradhakrishnan, yiwu, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56565
2016-04-19 14:36:09 -07:00
Islam AbdelRahman
b95510ddf4 Fix DBTest.RateLimitedDelete flakiness
Summary: We need to enable sync_point processing before creating the SstFileManager to ensure that we are holding the bg delete scheduler thread from running

Test Plan:
run the test
debug using printf

Reviewers: sdong, yhchiang, yiwu, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56871
2016-04-19 14:05:48 -07:00
Islam AbdelRahman
6356b4d516 Fix nullptr dereference in adaptive_table
Summary:
@dulmarod Ran infer on RocksDB and found that we dereference nullptr in adaptive_table
https://fb.facebook.com/groups/rocksdb/permalink/1046374415411173/

Test Plan: make check -j64

Reviewers: sdong, yhchiang, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56973
2016-04-19 13:57:05 -07:00
Andrew Kryczka
9385fd72c0 Delete deprecated backup classes in Java
Summary: Corresponding change to D56331.

Test Plan:
Now build succeeds:

  $ make jclean && make rocksdbjava

Reviewers: yhchiang, IslamAbdelRahman, adamretter

Reviewed By: adamretter

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56913
2016-04-19 10:32:31 -07:00
Yueh-Hsuan Chiang
a2466c8851 [db_stress] Make subcompaction random in crash_test
Summary: Make subcompaction random in crash_test

Test Plan: make crash_test and verify whether subcompaction changes randomly

Reviewers: IslamAbdelRahman, kradhakrishnan, yiwu, sdong, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56571
2016-04-18 14:43:33 -07:00
Andrew Kryczka
c3c389d542 Fix column label for L0 write sum
Summary:
This is taken from the "Write(GB)" column in compaction stats, so the
units should be GB, not MB.

Test Plan: none

Reviewers: sdong, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56889
2016-04-18 14:34:45 -07:00
Andrew Kryczka
ec84bef24a New legocastle output parsing
Summary:
Added a python script to parse combined stdout/stderr of legocastle
steps. Previously we just matched words like 'Failure', which didn't work since
even our test names matched that pattern.

I went through all the legocastle steps to come up with strict failure regexes
for the common failure cases. There is also some more complex logic to present
gtest failures, since the test name and failure message are not on the same
line.

There will definitely be error cases that don't match any of these patterns, so
we can iterate on it over time.

Test Plan:
no end-to-end test. I ran the legocastle steps locally and piped to
my script, then verified output, e.g.,

  $ set -o pipefail && TEST_TMPDIR=/dev/shm/rocksdb COMPILE_WITH_ASAN=1 OPT=-g make J=1 asan_check |& /usr/facebook/ops/scripts/asan_symbolize.py -d |& python build_tools/error_filter.py asan
  ==2058029==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000a414 at pc 0x4c12f6 bp 0x7ffcfb7a0520 sp 0x7ffcfb7a0518

Reviewers: kradhakrishnan

Reviewed By: kradhakrishnan

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56691
2016-04-18 13:01:10 -07:00
Yi Wu
725184b04e Fix db_block_cache_test in lite build
Summary: D56715 move some of the tests from db_test to db_block_cache_test. Some of them should be disabled in lite build.

Test Plan:
    make check -j32
    OPT='-DROCKSDB_LITE' make check -j32

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56907
2016-04-18 11:34:11 -07:00
Yi Wu
290883d94a Fix lite build
Summary: Fix rocksdb lite build after D56715.

Test Plan:
  make -j40 'OPT=-g -DROCKSDB_LITE'

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56895
2016-04-18 10:47:10 -07:00
sdong
23089fd281 write_callback_test: clean test directory before running tests
Summary: write_callback_test fails if previous run didn't finish cleanly. Clean the DB before runing the test.

Test Plan: Run the test that see it doesn't fail any more.

Reviewers: andrewkr, yhchiang, yiwu, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: kradhakrishnan, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56859
2016-04-18 10:18:41 -07:00
Yi Wu
792762c42c Split db_test.cc
Summary: Split db_test.cc into several files. Moving several helper functions into DBTestBase.

Test Plan: make check

Reviewers: sdong, yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

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

Differential Revision: https://reviews.facebook.net/D56715
2016-04-18 09:42:50 -07:00
Andrew Kryczka
40b840f294 Delete deprecated *BackupableDB interface for backups
Summary:
This interface is redundant and has been deprecated for a while.
It's also unused internally. Let's delete it.

I moved the comments to the corresponding functions in BackupEngine/
BackupEngineReadOnly. This caused the diff tool to not work cleanly.

Test Plan:
unit tests

  $ ./backupable_db_test

Reviewers: yhchiang, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56331
2016-04-18 09:04:14 -07:00
Yi Wu
6affd45d84 Make more tests run in parallel
Summary:
Generate t/run-* scripts to run tests in $PARALLEL_TEST separately, then make check_0 rule execute all of them.

Run `time make check` after running `make all`.
master: 71 sec
with this diff: 63 sec.

It seems moving more tests to $PARALLEL_TEST doesn't help improve test time though.

Test Plan:
Run the following
  make check
  J=16 make check
  J=1 make check
  make valgrind_check
  J=1 make valgrind_check
  J=16 make_valgrind_check

Reviewers: IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: leveldb, kradhakrishnan, dhruba, andrewkr, yhchiang

Differential Revision: https://reviews.facebook.net/D56805
2016-04-17 22:34:56 -07:00
Victor Tyutyunov
47833e0ab9 Merge branch 'master' of github.com:facebook/rocksdb 2016-04-16 01:48:17 -07:00
Victor Tyutyunov
e5c614e1df Fixing snapshot 0 assertion
Summary:
Solution is not to change db sequence number to start from 1 because 0 value is used in multiple other places.
Fix covers only compact_iterator::findEarliestVisibleSnapshot with updated logic to support snapshot's numbering starting from 0.

Test Plan:
run:
  make all check

it should pass all tests

Reviewers: IslamAbdelRahman, sdong

Reviewed By: sdong

Subscribers: lgalanis, mgalushka, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56601
2016-04-16 01:47:15 -07:00
Victor Tyutyunov
1b1adebe8f Fixing snapshot 0 assertion
Test Plan: TBD

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56601

Cosmetic changes and comment update
2016-04-16 01:45:31 -07:00
sdong
6d436a3f85 DBTest.HardLimit made more deterministic
Summary: In DBTest.HardLimit, multiple flushes may merge into one, based on thread scheduling. Avoid it by waiting each flush to finish before generating the next one.

Test Plan: Run test in parallel several times and see it doesn't fail any more.

Reviewers: yhchiang, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: yiwu, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56853
2016-04-15 17:36:57 -07:00
Islam AbdelRahman
994d9bc82b Make parallel valgrind watch-log more readable
Summary:
Before
{F1131675}

After
{F1131681}

This will have no effect on normal make check

Test Plan: make watch-log

Reviewers: sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56847
2016-04-15 16:21:03 -07:00
sdong
9d35ae649e Make DBTestUniversalCompaction.IncreaseUniversalCompactionNumLevels more deterministic
Summary: DBTestUniversalCompaction, IncreaseUniversalCompactionNumLevels fails one in about 30 runs when running in parallel. We wait for compaction after each flush to make the compaction behavior deterministic.

Test Plan: Run the test 1000 times in parallel and it still passes.

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: kradhakrishnan, yiwu, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56841
2016-04-15 16:16:53 -07:00
sdong
cea8ed9702 Fix backupable_db_test test cases that can't run by itself
Summary:
Several of backupable_db_test fails if running standalone, because of directory missing. Fix it by:
(1) garbage collector skips shared directory if it doesn't exit
(2) BackupableDBTest.Issue921Test to create the parent directory of the backup directory fist.

Test Plan: Run the tests individually and make sure they pass

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56829
2016-04-15 15:48:57 -07:00
sdong
4b6833aec1 Rename options.compaction_measure_io_stats to options.report_bg_io_stats and include flush too.
Summary: It is useful to print out IO stats in flush jobs too. Extend options.compaction_measure_io_stats to flush jobs and raname it.

Test Plan: Try db_bench and see the stats are printed out.

Reviewers: yhchiang

Reviewed By: yhchiang

Subscribers: kradhakrishnan, yiwu, IslamAbdelRahman, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56769
2016-04-15 10:22:18 -07:00
sdong
3894603fef Allow valgrind_check to run in parallel
Summary:
Extend "J=<parallel>" to valgrind_check.
For DBTest, modify the script to run valgrind. For other tests, prefix launch command with valgrind.

Test Plan: Run valgrind_check with J=1 and J>1 and make sure tests run under valgrind. Manually change codes to introduce memory leak and make sure "make watch-log" correctly report it.

Reviewers: yhchiang, yiwu, andrewkr, kradhakrishnan, IslamAbdelRahman

Reviewed By: kradhakrishnan, IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56727
2016-04-14 18:33:04 -07:00
Dmitri Smirnov
c9d668c584 Fix unit tests issues on Windows (#1078) 2016-04-14 17:33:53 -07:00
krad
083cadc7e9 Minor fix to Java sandcastle job definition
Summary:
proxy config tools are not available in sandcastle environment. Hard
coding the proxy information in the job.

Test Plan: Run manually

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56775
2016-04-14 15:05:54 -07:00
Sherlock
80b74a6c64 Include ldb tool in the windows build (#914) 2016-04-14 10:50:34 -07:00
krad
7c14d11eb9 Minor fix to java build job
Summary:
Java build is downloading junit when not available. Without the proxy
settings exported that would not work.

Test Plan: Run manually

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D56751
2016-04-14 10:46:02 -07:00
sdong
535af525d6 BlockBasedTable::PrefixMayMatch() to skip index checking if we can't find a filter block.
Summary:
In the case where we can't find a filter block, there is not much benefit of doing the binary search and see whether the index key has the prefix. With the change, we blindly return true if we can't get the filter.
It also fixes missing row cases for reverse comparator with full bloom.

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

Reviewers: yhchiang, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

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

Differential Revision: https://reviews.facebook.net/D56697
2016-04-13 19:06:48 -07:00