Summary:
We've got a crash with this stack trace:
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0 0x00007fc85f2f4009 in raise () from /usr/local/fbcode/gcc-4.9-glibc-2.20-fb/lib/libpthread.so.0
#1 0x00000000005c8f61 in facebook::logdevice::handle_sigsegv(int) () at logdevice/server/sigsegv.cpp:159
#2 0x00007fc85f2f4150 in <signal handler called> () at /usr/local/fbcode/gcc-4.9-glibc-2.20-fb/lib/libpthread.so.0
#3 0x00000000031ed80c in rocksdb::NewReadaheadRandomAccessFile() at util/file_reader_writer.cc:383
#4 0x00000000031ed80c in rocksdb::NewReadaheadRandomAccessFile() at util/file_reader_writer.cc:472
#5 0x00000000031558e7 in rocksdb::TableCache::GetTableReader() at db/table_cache.cc:99
#6 0x0000000003156329 in rocksdb::TableCache::NewIterator() at db/table_cache.cc:198
#7 0x0000000003166568 in rocksdb::VersionSet::MakeInputIterator() at db/version_set.cc:3345
#8 0x000000000324a94f in rocksdb::CompactionJob::ProcessKeyValueCompaction(rocksdb::CompactionJob::SubcompactionState*) () at db/compaction_job.cc:650
#9 0x000000000324c2f6 in rocksdb::CompactionJob::Run() () at db/compaction_job.cc:530
#10 0x00000000030f5ae5 in rocksdb::DBImpl::BackgroundCompaction() at db/db_impl.cc:3269
#11 0x0000000003108d36 in rocksdb::DBImpl::BackgroundCallCompaction(void*) () at db/db_impl.cc:2970
#12 0x00000000029a2a9a in facebook::logdevice::RocksDBEnv::callback(void*) () at logdevice/server/locallogstore/RocksDBEnv.cpp:26
#13 0x00000000029a2a9a in facebook::logdevice::RocksDBEnv::callback(void*) () at logdevice/server/locallogstore/RocksDBEnv.cpp:30
#14 0x00000000031e7521 in rocksdb::ThreadPool::BGThread() at util/threadpool.cc:230
#15 0x00000000031e7663 in rocksdb::BGThreadWrapper(void*) () at util/threadpool.cc:254
#16 0x00007fc85f2ea7f1 in start_thread () at /usr/local/fbcode/gcc-4.9-glibc-2.20-fb/lib/libpthread.so.0
#17 0x00007fc85e8fb46d in clone () at /usr/local/fbcode/gcc-4.9-glibc-2.20-fb/lib/libc.so.6
From looking at the code, probably what happened is this:
- `TableCache::GetTableReader()` called `Env::NewRandomAccessFile()`, which dispatched to a `PosixEnv::NewRandomAccessFile()`, where probably an `open()` call failed, so the `NewRandomAccessFile()` left a nullptr in the resulting file,
- `TableCache::GetTableReader()` called `NewReadaheadRandomAccessFile()` with that `nullptr` file,
- it tried to call file's method and crashed.
This diff is a trivial fix to this crash.
Test Plan: `make -j check`
Reviewers: sdong, andrewkr, IslamAbdelRahman
Reviewed By: IslamAbdelRahman
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D62451
Summary:
The global atomics we previously used for tickers had poor cache performance
since they were typically updated from different threads, causing frequent
invalidations. In this diff,
- recordTick() updates a local ticker value specific to the thread in which it was called
- When a thread exits, its local ticker value is added into merged_sum
- getTickerCount() returns the sum of all threads' local ticker values and the merged_sum
- setTickerCount() resets all threads' local ticker values and sets merged_sum to the value provided by the caller.
In a next diff I will make a similar change for histogram stats.
Test Plan:
before:
$ TEST_TMPDIR=/dev/shm/ perf record -g ./db_bench --benchmarks=readwhilewriting --statistics --num=1000000 --use_existing_db --threads=64 --cache_size=250000000 --compression_type=lz4
$ perf report -g --stdio | grep recordTick
7.59% db_bench db_bench [.] rocksdb::StatisticsImpl::recordTick
...
after:
$ TEST_TMPDIR=/dev/shm/ perf record -g ./db_bench --benchmarks=readwhilewriting --statistics --num=1000000 --use_existing_db --threads=64 --cache_size=250000000 --compression_type=lz4
$ perf report -g --stdio | grep recordTick
1.46% db_bench db_bench [.] rocksdb::StatisticsImpl::recordTick
...
Reviewers: kradhakrishnan, MarkCallaghan, IslamAbdelRahman, sdong
Reviewed By: sdong
Subscribers: yiwu, andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62337
This is the initial commit with the templates necessary to have our RocksDB user documentation hosted on GitHub pages.
Ensure you meet requirements here: https://help.github.com/articles/setting-up-your-github-pages-site-locally-with-jekyll/#requirements
Then you can run this right now by doing the following:
```
% bundle install
% bundle exec jekyll serve --config=_config.yml,_config_local_dev.yml
```
Then go to: http://127.0.0.1:4000/
Obviously, this is just the skeleton. Moving forward we will do these things in separate pull requests:
- Replace logos with RocksDB logos
- Update the color schemes
- Add current information on rocksdb.org to markdown in this infra
- Migrate current Wodpress blog to Jekyll and Disqus comments
- Etc.
Summary: fixed data race described in https://github.com/facebook/rocksdb/issues/1267 and add regression test
Test Plan:
./table_test --gtest_filter=BlockBasedTableTest.NewIndexIteratorLeak
make all check -j64
core dump before fix. ok after fix.
Reviewers: andrewkr, sdong
Reviewed By: sdong
Subscribers: igor, andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62361
Summary:
We used to allow insert into full block cache as long as `strict_capacity_limit=false`. This diff further restrict insert to full cache if caller don't intent to hold handle to the cache entry after insert.
Hope this diff fix the assertion failure with db_stress: https://our.intern.facebook.com/intern/sandcastle/log/?instance_id=211853102&step_id=2475070014
db_stress: util/lru_cache.cc:278: virtual void rocksdb::LRUCacheShard::Release(rocksdb::Cache::Handle*): Assertion `lru_.next == &lru_' failed.
The assertion at lru_cache.cc:278 can fail when an entry is inserted into full cache and stay in LRU list.
Test Plan:
make all check
Reviewers: IslamAbdelRahman, lightmark, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62325
Summary:
Add option to block based table to insert index/filter blocks to block cache with priority. Combined with LRUCache with high_pri_pool_ratio, we can reserved space for index/filter blocks, make them less likely to be evicted.
Depends on D61977.
Test Plan: See unit test.
Reviewers: lightmark, IslamAbdelRahman, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, march, leveldb
Differential Revision: https://reviews.facebook.net/D62241
Summary:
This function allows the user to provide a custom function to fold all
threads' local data. It will be used in my next diff for aggregating statistics
stored in thread-local data. Note the test case uses atomics as thread-local
values due to the synchronization requirement (documented in code).
Test Plan: unit test
Reviewers: yhchiang, sdong, kradhakrishnan
Reviewed By: kradhakrishnan
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62049
* Rename RocksDB#remove -> RocksDB#delete to match C++ API; Added deprecated versions of RocksDB#remove for backwards compatibility.
* Add missing experimental feature RocksDB#singleDelete
Summary: value is not an InternalKey, we do not need to decode it
Test Plan:
setup:
$ ldb put --create_if_missing=true k v
$ ldb put --db=./tmp --create_if_missing k v
$ ldb compact --db=./tmp
before:
$ sst_dump --command=raw --file=./tmp/000004.sst
...
terminate called after throwing an instance of 'std::length_error'
after:
$ ./sst_dump --command=raw --file=./tmp/000004.sst
$ cat tmp/000004_dump.txt
...
ASCII k : v
...
Reviewers: sdong, yhchiang, IslamAbdelRahman
Reviewed By: IslamAbdelRahman
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62301
Summary:
Add mid-point insertion functionality to LRU cache. Caller of `Cache::Insert()` can set an additional parameter to make a cache entry have higher priority. The LRU cache will reserve at most `capacity * high_pri_pool_pct` bytes for high-pri cache entries. If `high_pri_pool_pct` is zero, the cache degenerates to normal LRU cache.
Context: If we are to put index and filter blocks into RocksDB block cache, index/filter block can be swap out too early. We want to add an option to RocksDB to reserve some capacity in block cache just for index/filter blocks, to mitigate the issue.
In later diffs I'll update block based table reader to use the interface to cache index/filter blocks at high priority, and expose the option to `DBOptions` and make it dynamic changeable.
Test Plan: unit test.
Reviewers: IslamAbdelRahman, sdong, lightmark
Reviewed By: lightmark
Subscribers: andrewkr, dhruba, march, leveldb
Differential Revision: https://reviews.facebook.net/D61977
Summary: Update SstFileWriter to use user TablePropertiesCollectors that are passed in Options
Test Plan: unittests
Reviewers: sdong
Reviewed By: sdong
Subscribers: jkedgar, andrewkr, hermanlee4, dhruba, yoshinorim
Differential Revision: https://reviews.facebook.net/D62253
Summary: 1. Range Deletion Tombstone structure 2. Modify Add() in table_builder to make it usable for adding range del tombstones 3. Expose NewTombstoneIterator() API in table_reader
Test Plan: table_test.cc (now BlockBasedTableBuilder::Add() only accepts InternalKey. I make table_test only pass InternalKey to BlockBasedTableBuidler. Also test writing/reading range deletion tombstones in table_test )
Reviewers: sdong, IslamAbdelRahman, lightmark, andrewkr
Reviewed By: andrewkr
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61473
Summary:
Clock-based cache implemenetation aim to have better concurreny than
default LRU cache. See inline comments for implementation details.
Test Plan:
Update cache_test to run on both LRUCache and ClockCache. Adding some
new tests to catch some of the bugs that I fixed while implementing the
cache.
Reviewers: kradhakrishnan, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61647
Summary: Splitting the makefile part of D55581.
Test Plan:
make all check -j32
ROCKSDB_FBCODE_BUILD_WITH_481=1 make all check -j32
ROCKSDB_NO_FBCODE=1 make all check -j32
export TBB_BASE=/mnt/gvfs/third-party2/tbb/afa54b33cfcf93f1d90a3160cdb894d6d63d5dca/4.0_update2/gcc-4.9-glibc-2.20/e9936bf;
ROCKSDB_NO_FBCODE=1 CFLAGS="-I $TBB_BASE/include" LDFLAGS="-L $TBB_BASE/lib -Wl,-rpath=$TBB_BASE/lib" make all check -j32
Reviewers: IslamAbdelRahman, sdong
Reviewed By: sdong
Subscribers: kradhakrishnan, yhchiang, IslamAbdelRahman, andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D56979
* Create rate limiter using factory function in the test.
* Convert function local statics in option helper to a C array
that does not perform dynamic memory allocation. This is helpful
when you try to memory isolate different DB instances.
Summary: ... so that I can include the header and create LRUCache specific tests for D61977
Test Plan:
make check
Reviewers: lightmark, IslamAbdelRahman, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62145
Summary:
Added 2 statistics in compaction job statistics, to
identify if single deletes are not meeting a matching key
(fallthrough) or single deletes are meeting a merge, delete or
another single delete (i.e. not the expected case of put).
Test Plan: Tested the statistics using write_stress and compaction_job_stats_test
Reviewers: sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D61749
Summary:
Add API to WriteBatch to store range deletions in its buffer
which are later added to memtable. In the WriteBatch buffer, a range
deletion is encoded as "<optype><CF ID (optional)><begin key><end key>".
With this diff, the range tombstones are stored inline with the data in
the memtable. It's useful for now because the test cases rely on the
data being accessible via memtable. My next step is to store range
tombstones in a separate area in the memtable.
Test Plan: unit tests
Reviewers: IslamAbdelRahman, sdong, wanning
Reviewed By: wanning
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61401
Summary:
We were frequently seeing a race between SyncPoint::Process() and
SyncPoint::~SyncPoint() (e.g.,
https://our.intern.facebook.com/intern/sandcastle/log/?instance_id=207289975&step_id=2412725431).
The issue was marked_thread_id_ gets deleted when the main thread is exiting and
simultaneously background threads may access it. We can prevent this race
condition by checking whether sync points are disabled (assuming the test terminates
with them disabled) before attempting to access that member. I do not understand
why accesses to other members (mutex_ and enabled_) are ok but anyways the
test no longer fails tsan.
Test Plan: ran tests
Reviewers: sdong, yhchiang, IslamAbdelRahman, yiwu, wanning
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D62133
Summary: Fix the test by releasing the last snapshot
Test Plan: run the test under valgrind
Reviewers: andrewkr, yiwu, lightmark, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D62091
Summary: "Batch" is ambiguous in this context. It can mean "write batch" or commit group. Change it to commit group to be clear.
Test Plan: Build
Reviewers: MarkCallaghan, yhchiang, IslamAbdelRahman
Reviewed By: IslamAbdelRahman
Subscribers: leveldb, andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D62055
Summary:
Env holds a pointer of ThreadStatusUpdater, which will be deleted when
Env is deleted. However, in case a rocksdb database is deleted after
Env is deleted. Then this will introduce a free-after-use of this
ThreadStatusUpdater.
This patch fix this by never deleting the ThreadStatusUpdater in Env,
which is in general safe as Env is a singleton in most cases.
Test Plan: thread_list_test
Reviewers: andrewkr, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D59187
Summary: Added min/max/avg data block size output to sst_dump. Output was added to the end of BlockBasedTable::DumpDataBlocks, so it appears after the data block details, at the very end of the dump file.
Test Plan:
```
./db_bench --benchmarks=fillrandom
./sst_dump --file=/tmp/rocksdbtest-xyz/dbbench/000007.sst --command=raw
tail -n 6 /tmp/rocksdbtest-xyz/dbbench/000007_dump.txt
```
```
Data Block Summary:
--------------------------------------
# data blocks: 11336
min data block size: 903
max data block size: 2268
avg data block size: 2245.363356
```
Reviewers: IslamAbdelRahman
Reviewed By: IslamAbdelRahman
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D61815
Summary: preparation for detecting Cache type. If SimCache, we then may trigger some command like "setSimCapacity()" with setOptions()
Test Plan: make all check
Reviewers: yiwu, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61953
Summary:
This diff update ForwardIterator to support pinning keys and values, which will allow DBIter to take advantage of that and eliminate memcpy when executing merge operators
This diff is stacked on D61305
Test Plan:
existing tests (updated them to test tailing iterator)
new test
Reviewers: andrewkr, yhchiang, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D60009
Summary:
This diff improves the documentation for GetOptionsFromMap APIs and
fixes a bug in GetOptionsFromMap functions in convenience.h
where new_options will still be changed when the function
call is not successful.
Test Plan: options_test
Reviewers: IslamAbdelRahman, kradhakrishnan, andrewkr, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61731
Summary: make transactionDB working with StackableDB
Test Plan: make all check -j64
Reviewers: andrewkr, yiwu, sdong
Reviewed By: sdong
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D60705
Summary:
Travis times out with persistent_cache_test, there is no way to increase the
timeout, so lower the test case for Travis
Test Plan: Run on travis and sandcastle
Subscribers: leveldb, dhruba, andrewkr
Differential Revision: https://reviews.facebook.net/D61863
Summary:
This diff include these simple change
- Rename ReleasePinnedIterators to ReleasePinnedData
- Rename PinIteratorIfNeeded to PinIterator
- Use std::vector directly in PinnedIteratorsManager instead of std::unique_ptr<std::vector>
- Generalize PinnedIteratorsManager by adding PinPtr which can pin any pointer
Test Plan: existing tests
Reviewers: sdong, yiwu, andrewkr
Reviewed By: andrewkr
Subscribers: andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D61305
* Update arc config for ArcanistBaseUnitTestEngine -> ArcanistUnitTestEngine
Test Plan: Execute Java test suite
Reviewers: yhchiang
Differential Revision: https://reviews.facebook.net/D61911
* Fix for arc use of base64 command on Max OS X
Test Plan: Run on `arc diff` on Mac OS X and Linux
Reviewers: yhchiang
Differential Revision: https://reviews.facebook.net/D61917
Summary:
add SIM_BLOCK_CACHE_HIT and SIM_BLOCK_CACHE_MISS tickers.
maybe can be combined with Histograms like DB_GET to evaluate the current setting of the size of block cache.
Test Plan: make all check
Reviewers: sdong, andrewkr, IslamAbdelRahman, yiwu
Reviewed By: yiwu
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D61803
Summary:
This is a proof of concept of a RocksDB blob log file. The actual value of the Put() is appended to a blob log using normal data block format, and the handle of the block is written as the value of the key in RocksDB.
The prototype only supports Put() and Get(). It doesn't support DB restart, garbage collection, Write() call, iterator, snapshots, etc.
Test Plan: Add unit tests.
Reviewers: arahut
Reviewed By: arahut
Subscribers: kradhakrishnan, leveldb, andrewkr, dhruba
Differential Revision: https://reviews.facebook.net/D61485
