Summary:
Some Mongo+Rocks datasets in Parse's environment are not doing compactions very frequently. During the quiet period (with no IO), we'd like to schedule compactions so that our reads become faster. Also, aggressively compacting during quiet periods helps when write bursts happen. In addition, we also want to compact files that are containing deleted key ranges (like old oplog keys).
All of this is currently not possible with CompactRange() because it's single-threaded and blocks all other compactions from happening. Running CompactRange() risks an issue of blocking writes because we generate too much Level 0 files before the compaction is over. Stopping writes is very dangerous because they hold transaction locks. We tried running manual compaction once on Mongo+Rocks and everything fell apart.
MarkForCompaction() solves all of those problems. This is very light-weight manual compaction. It is lower priority than automatic compactions, which means it shouldn't interfere with background process keeping the LSM tree clean. However, if no automatic compactions need to be run (or we have extra background threads available), we will start compacting files that are marked for compaction.
Test Plan: added a new unit test
Reviewers: yhchiang, rven, MarkCallaghan, sdong
Reviewed By: sdong
Subscribers: yoshinorim, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D37083
Summary:
The usage I'm fixing here caused trouble on Fedora 21 when
compiling with the current gcc version 4.9.2 20150212 (Red Hat 4.9.2-6) (GCC):
db/write_controller_test.cc: In member function ‘virtual void rocksdb::WriteControllerTest_SanityTest_Test::TestBody()’:
db/write_controller_test.cc:23:165: error: converting ‘false’ to pointer type for argument 1 of ‘char testing::internal::IsNullLiteralHelper(testing::internal::Secret*)’ [-Werror=conversion-null]
ASSERT_EQ(false, controller.IsStopped());
^
This change was induced mechanically via:
git grep -l -E 'ASSERT_EQ\(false'|xargs perl -pi -e 's/ASSERT_EQ\(false, /ASSERT_FALSE(/'
git grep -l -E 'ASSERT_EQ\(true'|xargs perl -pi -e 's/ASSERT_EQ\(true, /ASSERT_TRUE(/'
Except for the three in utilities/backupable/backupable_db_test.cc for which
I ended up reformatting (joining lines) in the result.
As for why this problem is exhibited with that version of gcc, and none
of the others I've used (from 4.8.1 through gcc-5.0.0 and newer), I suspect
it's a bug in F21's gcc that has been fixed in gcc-5.0.0.
Test Plan:
"make" now succeed on Fedora 21
Reviewers: ljin, rven, igor.sugak, yhchiang, sdong, igor
Reviewed By: igor
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D37329
Summary: this is not used anywhere
Test Plan: compiles
Reviewers: yhchiang, sdong
Reviewed By: sdong
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D37053
Summary: For some reason reduce_levels is opening the databse with 65.000 levels. This makes ComputeCompactionScore() function terribly slow and the tests is also very slow (20seconds).
Test Plan: mr reduce_levels_test now takes 20ms
Reviewers: sdong, rven, kradhakrishnan, yhchiang
Reviewed By: yhchiang
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D37059
Summary: If ExpandWhileOverlapping() we don't clear inputs. That's a bug introduced by my recent patch https://reviews.facebook.net/D36687. However, we have no tests covering ExpandWhileOverlapping(). I created a task t6771252 to add ExpandWhileOverlapping() tests.
Test Plan: make check
Reviewers: sdong, rven, yhchiang
Reviewed By: yhchiang
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D37077
Summary: D36669 introduces a bug that trivial moved data is not going to specific level but the next level, which will incorrectly be level 1 for level 0 compaciton if base level is not level 1. Fixing it by appreciating the output level
Test Plan: Run all tests
Reviewers: MarkCallaghan, rven, yhchiang, igor
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D37119
Summary:
Recent change of DBTest.DynamicLevelCompressionPerLevel2 has a bug that the second sync point is not enabled. Fix it. Also add an assert for that.
Also, flush compression is not tracked in the test. Add it.
Test Plan: Build everything
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D37101
Summary: When commiting the sync point interface change, didn't resolve the new occurance of the old interface in rebase. Fix it.
Test Plan: Build and see it pass
Reviewers: igor, yhchiang, rven, anthony, kradhakrishnan
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D37095
Summary:
Allow users to give a callback function with parameter using sync point, so more complicated verification can be done in tests.
Use it in DBTest.DynamicLevelCompressionPerLevel2 so that failures will be more easy to debug.
Test Plan: Run all tests. Run DBTest.DynamicLevelCompressionPerLevel2 with valgrind check.
Reviewers: rven, yhchiang, anthony, kradhakrishnan, igor
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D36999
Summary: https://reviews.facebook.net/D36963 made the debug build much faster and that triggered failures of CompactFilesOnLevelCompaction test. 3 out of 4 last tests on Jenkins failed. I'm disabling this test temporarily, since we likely know the reason why it's failing and there's already work in progress to address it -- https://reviews.facebook.net/D36225
Test Plan: none
Reviewers: sdong, rven, yhchiang, meyering
Reviewed By: meyering
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36993
On Centos 6, you need to explicitely include linux/falloc.h which is
whele the FALLOC_FL_* flags are defined. Otherwise, the fallocate()
support test defined in build_detect_platform will fail.
Signed-off-by: Pooya Shareghi <shareghi@gmail.com>
Summary:
This changes loads to use vector memtable and disable the WAL. This also
increases the chance we will see IO bottlenecks during loads which is good to stress
test HW. But I also think it is a good way to load data quickly as this is a bulk
operation and the WAL isn't needed.
The two numbers below are the MB/sec rates for fillseq, bulkload using a skiplist
or vector memtable and the WAL enabled or disabled. There is a big benefit from
using the vector memtable and WAL disabled. Alas there is also a perf bug in
the use of std::sort for ordered input when the vector is flushed. Task is open
for that.
112, 66 - skiplist with wal
250, 116 - skiplist without wal
110, 108 - vector with wal
232, 370 - vector without wal
Task ID: #
Blame Rev:
Test Plan:
Revert Plan:
Database Impact:
Memcache Impact:
Other Notes:
EImportant:
- begin *PUBLIC* platform impact section -
Bugzilla: #
- end platform impact -
Reviewers: igor
Reviewed By: igor
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D36957
Summary: We should use mocked-out env for these tests to make it more realiable. Added benefit is that instead of actually sleeping for 3 seconds, we can instead pretend to sleep and just increase time counters.
Test Plan: for i in `seq 100`; do ./wal_manager_test --gtest_filter=WalManagerTest.WALArchivalTtl ;done
Reviewers: rven, meyering
Reviewed By: meyering
Subscribers: meyering, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36951
Summary: As title. For every operation we're asserting Valid(), which sorts the data. That's pretty terrible. We have to be careful to have decent performance even with DEBUG builds.
Test Plan: make check
Reviewers: sdong, rven, yhchiang, MarkCallaghan
Reviewed By: MarkCallaghan
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36969
Summary: Make target for running all xfunc tests
Test Plan: make xfunc
Reviewers: igor, sdong, meyering
Reviewed By: meyering
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36873
Summary:
The problem is that sometimes two memtables will be compacted together into a single file. In that case, our assertion
ASSERT_EQ(NumTableFilesAtLevel(0), 5);
fails because same amount of data is in 4 files instead of 5. We should wait for flush so that we prevent two memtables merging into a single file.
Test Plan: `for i in `seq 20`; do mrtest FIFOCompactionTest; done` -- fails at least once before. fails zero times after.
Reviewers: rven
Reviewed By: rven
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36939
Summary:
1. it doesn't work
2. we're not using it
In the future, if we need general benchmark framework, we should probably use https://github.com/google/benchmark
Test Plan: make all
Reviewers: yhchiang, rven, anthony, sdong
Reviewed By: sdong
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36777
Summary:
The goal of this diff is to make Compaction class easier to use. This should also make new compaction algorithms easier to write (like CompactFiles from @yhchiang and dynamic leveled and multi-leveled universal from @sdong).
Here are couple of things demonstrating that Compaction class is hard to use:
1. we have two constructors of Compaction class
2. there's this thing called grandparents_, but it appears to only be setup for leveled compaction and not compactfiles
3. it's easy to introduce a subtle and dangerous bug like this: D36225
4. SetupBottomMostLevel() is hard to understand and it shouldn't be. See this comment: afbafeaeae/db/compaction.cc (L236-L241). It also made it harder for @yhchiang to write CompactFiles, as evidenced by this: afbafeaeae/db/compaction_picker.cc (L204-L210)
The problem is that we create Compaction object, which holds a lot of state, and then pass it around to some functions. After those functions are done mutating, then we call couple of functions on Compaction object, like SetupBottommostLevel() and MarkFilesBeingCompacted(). It is very hard to see what's happening with all that Compaction's state while it's travelling across different functions. If you're writing a new PickCompaction() function you need to try really hard to understand what are all the functions you need to run on Compaction object and what state you need to setup.
My proposed solution is to make important parts of Compaction immutable after construction. PickCompaction() should calculate compaction inputs and then pass them onto Compaction object once they are finalized. That makes it easy to create a new compaction -- just provide all the parameters to the constructor and you're done. No need to call confusing functions after you created your object.
This diff doesn't fully achieve that goal, but it comes pretty close. Here are some of the changes:
* have one Compaction constructor instead of two.
* inputs_ is constant after construction
* MarkFilesBeingCompacted() is now private to Compaction class and automatically called on construction/destruction.
* SetupBottommostLevel() is gone. Compaction figures it out on its own based on the input.
* CompactionPicker's functions are not passing around Compaction object anymore. They are only passing around the state that they need.
Test Plan:
make check
make asan_check
make valgrind_check
Reviewers: rven, anthony, sdong, yhchiang
Reviewed By: yhchiang
Subscribers: sdong, yhchiang, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36687
Summary: Need to remember to unref MemTableList->current() before deleting.
Test Plan: ran test with valgrind
Reviewers: igor
Reviewed By: igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36855
Summary:
Test failing due to a missing directory caused by a simple bug (did not run into this on my dev box since the path already existed).
We should look into deleting test::TmpDir() before each test run.
Test Plan: ran test
Reviewers: igor, yhchiang, meyering, sdong
Reviewed By: sdong
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36831
Summary:
Fixed xfunc related compile errors in ROCKSDB_LITE
Now make OPT=-DROCKSDB_LITE shared_lib -j32 would work
Test Plan:
make clean
make OPT=-DROCKSDB_LITE shared_lib -j32
make clean
make OPT=-DROCKSDB_LITE static_lib -j32
Reviewers: sdong, igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36825
Summary: Add tests for MemTableList
Test Plan: run test
Reviewers: yhchiang, kradhakrishnan, sdong, igor
Reviewed By: igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36735
Summary:
Fix a compile error in ROCKSDB_LITE in db/db_impl.cc
related to internal_stats.
Test Plan: make OPT=-DROCKSDB_LITE shared_lib
Reviewers: sdong, igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36819
Summary: "make commit-prereq" uses "make release" which overrides OPT, so ROCKSDB_LITE is not covered. Fix it by using "make static_lib"
Test Plan: Run it and see it fail (which is expected)
Reviewers: yhchiang, meyering, rven, anthony, kradhakrishnan, igor
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D36813
Summary:
Fix a compilation error in ROCKSDB_LITE in db/internal_stats.h
Other compilation errors will be fixed in a separate diff.
Test Plan: make OPT=-DROCKSDB_LITE
Reviewers: sdong, igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36807
Summary:
Add a test case:
Write some keys without sync, flush, write other keys and do sync. Before flush finishes, host crashes and unsync data is dropped.
Tag the new test as disabled since it is not passing.
Test Plan: Run the test
Reviewers: MarkCallaghan, rven, anthony, igor, kradhakrishnan
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D36741
Summary:
This fixes two problems:
1) the env should not be created twice when use_existing_db is false
2) the env dtor should run before cachedev_fd_ is closed.
Task ID: #
Blame Rev:
Test Plan:
Revert Plan:
Database Impact:
Memcache Impact:
Other Notes:
EImportant:
- begin *PUBLIC* platform impact section -
Bugzilla: #
- end platform impact -
Reviewers: igor
Reviewed By: igor
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D36795
Summary: I don't think we need to use whole-archive to include jemalloc. This change only affects our development builds -- it does not affect our open source builds (which don't support jemalloc) or our fbcode third-party2 builds (which use open-source build codepaths).
Test Plan:
make
verify that jemalloc is running by running `MALLOC_CONF="prof:true" ./cache_test` and observing that file was created
Reviewers: MarkCallaghan
Reviewed By: MarkCallaghan
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36783
Summary: Other than making some class members private, this is a documentation-only change
Test Plan: unit tests
Reviewers: sdong, yhchiang, igor
Reviewed By: igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36567
Summary: Add a script, which checks out changes from a list of tags, build them and load the same data into it. In the last, checkout the target build and make sure it can successfully open DB and read all the data. It is implemented through ldb tool, because ldb tool is available from all previous builds so that we don't have to cross build anything.
Test Plan: Run the script.
Reviewers: yhchiang, rven, anthony, kradhakrishnan, igor
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D36639
Summary: Now EnvOptions uses unsanitized DB options. bytes_per_sync is tuned off when rate_limiter is used, but this change doesn't take effort.
Test Plan: See different I/O pattern in db_bench running fillseq.
Reviewers: yhchiang, kradhakrishnan, rven, anthony, igor
Reviewed By: igor
Subscribers: leveldb, dhruba
Differential Revision: https://reviews.facebook.net/D36723
Summary: These two files are test binaries and are not included in TESTS in Makefile.
Test Plan: `make clean` now deletes those files, too
Reviewers: sdong, kradhakrishnan, meyering
Reviewed By: kradhakrishnan, meyering
Subscribers: kradhakrishnan, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36705
Summary:
When building rocksdbjava and rocksdbjavastatic, create -fPIC-enabled
binaries in a temporary subdirectory, jl/.
* Makefile (java_libobjects): New variable.
(java_libobjects): New rule.
(CLEAN_FILES): Arrange for "make clean" to remove that temporary dir.
(rocksdbjavastatic): Depend on the new variable.
Remove useless OPT=... line.
(rocksdbjava): Likewise.
Test Plan:
JAVA_HOME=/usr/local/jdk-7u67-64 PATH=$JAVA_HOME/bin:$PATH \
make rocksdbjavastatic
Reviewers: yhchiang
Reviewed By: yhchiang
Subscribers: dhruba
Differential Revision: https://reviews.facebook.net/D36645
Summary: Now trivial move is only triggered when moving from level n to n+1. With dynamic level base, it is possible that file is moved from level 0 to level n, while levels from 1 to n-1 are empty. Extend trivial move to this case.
Test Plan: Add a more unit test of sequential loading. Non-trivial compaction happened without the patch and now doesn't happen.
Reviewers: rven, yhchiang, MarkCallaghan, igor
Reviewed By: igor
Subscribers: leveldb, dhruba, IslamAbdelRahman
Differential Revision: https://reviews.facebook.net/D36669
