- 24 5月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Summary: There was an artifical limit on the size of the write buffer size. Test Plan: make check Reviewers: haobo Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D10911
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- 22 5月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: Currently, with paranoid_check on, DB::Open will fail on any log read error on recovery. If client is ok with losing most recent updates, we could simply skip those errors. However, it's important to introduce an additional flag, so that paranoid_check can still guard against more serious problems. Test Plan: make check; db_stress Reviewers: dhruba, emayanke Reviewed By: emayanke CC: leveldb, emayanke Differential Revision: https://reviews.facebook.net/D10869
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- 18 5月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: Make stop watch a simple implementation, instead of subclass of a virtual class Allocate stop watches off the stack instead of heap. Code is more terse now. Test Plan: make all check, db_bench with --statistics=1 Reviewers: haobo, dhruba Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D10809
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- 14 5月, 2013 2 次提交
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由 Haobo Xu 提交于
[RocksDB] Cleanup compaction filter to use a class interface, instead of function pointer and additional context pointer. Summary: This diff replaces compaction_filter_args and CompactionFilter with a single compaction_filter parameter. It gives CompactionFilter better encapsulation and a similar look to Comparator and MergeOpertor, which improves consistency of the overall interface. The change is not backward compatible. Nevertheless, the two references in fbcode are not in production yet. Test Plan: make check Reviewers: dhruba Reviewed By: dhruba CC: leveldb, zshao Differential Revision: https://reviews.facebook.net/D10773
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由 Haobo Xu 提交于
Summary: Currently, compaction filter is run on internal key older than the oldest snapshot, which is incorrect. Compaction filter should really be run on the most recent internal key when there is no external snapshot. Test Plan: make check; db_stress Reviewers: dhruba Reviewed By: dhruba Differential Revision: https://reviews.facebook.net/D10641
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- 11 5月, 2013 1 次提交
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由 Abhishek Kona 提交于
Test Plan: make check Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D10575
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- 07 5月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: WAL files are moved to archive directory and clear only at DB::Open. Can lead to a lot of space consumption in a Database. Added logic to periodically clear Archive Directory too. Test Plan: make all check + add unit test Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D10617
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- 04 5月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: This diff introduces a new Merge operation into rocksdb. The purpose of this review is mostly getting feedback from the team (everyone please) on the design. Please focus on the four files under include/leveldb/, as they spell the client visible interface change. include/leveldb/db.h include/leveldb/merge_operator.h include/leveldb/options.h include/leveldb/write_batch.h Please go over local/my_test.cc carefully, as it is a concerete use case. Please also review the impelmentation files to see if the straw man implementation makes sense. Note that, the diff does pass all make check and truly supports forward iterator over db and a version of Get that's based on iterator. Future work: - Integration with compaction - A raw Get implementation I am working on a wiki that explains the design and implementation choices, but coding comes just naturally and I think it might be a good idea to share the code earlier. The code is heavily commented. Test Plan: run all local tests Reviewers: dhruba, heyongqiang Reviewed By: dhruba CC: leveldb, zshao, sheki, emayanke, MarkCallaghan Differential Revision: https://reviews.facebook.net/D9651
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- 23 4月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: - don't see a point exposing table.h to the public. - fixed make clean to remove also *.d files. Test Plan: make check; db_stress Reviewers: dhruba, heyongqiang Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D10479
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- 21 4月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: - removed the compaction_filter_value from the callback interface. Restrict compaction filter to purging values. - modify some comments to reflect curent status. Test Plan: make check Reviewers: dhruba Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D10335
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- 16 4月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: A better error message. A local change. Did not look at other places where this could be done. Test Plan: compile Reviewers: dhruba, MarkCallaghan Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D10251
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- 13 4月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: FindObsoleteFiles was slow, holding the single big lock, resulted in bad p99 behavior. Didn't profile anything, but several things could be improved: 1. VersionSet::AddLiveFiles works with std::set, which is by itself slow (a tree). You also don't know how many dynamic allocations occur just for building up this tree. switched to std::vector, also added logic to pre-calculate total size and do just one allocation 2. Don't see why env_->GetChildren() needs to be mutex proteced, moved to PurgeObsoleteFiles where mutex could be unlocked. 3. switched std::set to std:unordered_set, the conversion from vector is also inside PurgeObsoleteFiles I have a feeling this should pretty much fix it. Test Plan: make check; db_stress Reviewers: dhruba, heyongqiang, MarkCallaghan Reviewed By: dhruba CC: leveldb, zshao Differential Revision: https://reviews.facebook.net/D10197
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- 12 4月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Summary: using unique_ptr to have automatic delete for probableWALfiles in db_impl.cc Test Plan: make Reviewers: sheki, dhruba Reviewed By: sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D10083
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- 11 4月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Summary: The segfault was happening because the program was unable to open a new sst file (as part of the compaction) because the process ran out of file descriptors. The fix is to check the return status of the file creation before taking any other action. Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fabf03f9700 (LWP 29904)] leveldb::DBImpl::OpenCompactionOutputFile (this=this@entry=0x7fabf9011400, compact=compact@entry=0x7fabf741a2b0) at db/db_impl.cc:1399 1399 db/db_impl.cc: No such file or directory. (gdb) where Test Plan: make check Reviewers: MarkCallaghan, sheki Reviewed By: MarkCallaghan CC: leveldb Differential Revision: https://reviews.facebook.net/D10101
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- 09 4月, 2013 1 次提交
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由 Abhishek Kona 提交于
[RocksDB][Bug] Look at all the files, not just the first file in TransactionLogIter as BatchWrites can leave it in Limbo Summary: Transaction Log Iterator did not move to the next file in the series if there was a write batch at the end of the currentFile. The solution is if the last seq no. of the current file is < RequestedSeqNo. Assume the first seqNo. of the next file has to satisfy the request. Also major refactoring around the code. Moved opening the logreader to a seperate function, got rid of goto. Test Plan: added a unit test for it. Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb, emayanke Differential Revision: https://reviews.facebook.net/D10029
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- 03 4月, 2013 2 次提交
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由 Abhishek Kona 提交于
Summary: During recovery, last_updated_manifest number was not set if there were no records in the Write-ahead log. Now check for the recovered manifest also and set last_updated_manifest file to the max value. Test Plan: unit test Reviewers: heyongqiang Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9891
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由 Haobo Xu 提交于
Summary: As title. Code is shorter and cleaner See https://our.dev.facebook.com/intern/tasks/?t=2233981 Test Plan: make check Reviewers: dhruba, heyongqiang Reviewed By: dhruba CC: leveldb, zshao Differential Revision: https://reviews.facebook.net/D9789
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- 29 3月, 2013 4 次提交
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由 Haobo Xu 提交于
Summary: If a class owns an object: - If the object can be null => use a unique_ptr. no delete - If the object can not be null => don't even need new, let alone delete - for runtime sized array => use vector, no delete. Test Plan: make check Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb, zshao, sheki, emayanke, MarkCallaghan Differential Revision: https://reviews.facebook.net/D9783
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由 Abhishek Kona 提交于
Summary: RocksDB does a binary search to look at the files which might contain the requested sequence number at the call GetUpdatesSince. There was a bug in the binary search => when the file pointed by the middle index of bsearch was empty/corrupt it needst to resize the vector and update indexes. This now fixes that. Test Plan: existing unit tests pass. Reviewers: heyongqiang, dhruba Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9777
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由 Abhishek Kona 提交于
Summary: If the vector returned by GetUpdatesSince is empty, it is still returned to the user. This causes it throw an std::range error. The probable file list is checked and it returns an IOError status instead of OK now. Test Plan: added a unit test. Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9771
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由 Abhishek Kona 提交于
Summary: Use non mmapd files for Write-Ahead log. Earlier use of MMaped files. made the log iterator read ahead and miss records. Now the reader and writer will point to the same physical location. There is no perf regression : ./db_bench --benchmarks=fillseq --db=/dev/shm/mmap_test --num=$(million 20) --use_existing_db=0 --threads=2 with This diff : fillseq : 10.756 micros/op 185281 ops/sec; 20.5 MB/s without this dif : fillseq : 11.085 micros/op 179676 ops/sec; 19.9 MB/s Test Plan: unit test included Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9741
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- 27 3月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: rocksdb uses a single global lock to protect in memory metadata. We should minimize the mutex protected code section to increase the effective parallelism of the program. See https://our.intern.facebook.com/intern/tasks/?t=2218928 Test Plan: make check db_bench Reviewers: dhruba, heyongqiang CC: zshao, leveldb Differential Revision: https://reviews.facebook.net/D9705
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- 21 3月, 2013 2 次提交
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由 Dhruba Borthakur 提交于
Summary: The events that trigger compaction: * opening the database * Get -> only if seek compaction is not disabled and other checks are true * MakeRoomForWrite -> when memtable is full * BackgroundCall -> If the background thread is about to do a compaction run, it schedules a new background task to trigger a possible compaction. This will cause additional background threads to find and process other compactions that can run concurrently. Test Plan: ran db_bench with overwrite and readonly alternatively. Reviewers: sheki, MarkCallaghan Reviewed By: sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D9579
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由 Dhruba Borthakur 提交于
Summary: This patch allows an application to specify whether to use bufferedio, reads-via-mmaps and writes-via-mmaps per database. Earlier, there was a global static variable that was used to configure this functionality. The default setting remains the same (and is backward compatible): 1. use bufferedio 2. do not use mmaps for reads 3. use mmap for writes 4. use readaheads for reads needed for compaction I also added a parameter to db_bench to be able to explicitly specify whether to do readaheads for compactions or not. Test Plan: make check Reviewers: sheki, heyongqiang, MarkCallaghan Reviewed By: sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D9429
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- 20 3月, 2013 3 次提交
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由 Mayank Agarwal 提交于
Summary: Makefile had options to ignore sign-comparisons and unused-parameters, which should be there. Also fixed the specific errors in the code-base Test Plan: make Reviewers: chip, dhruba Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D9531
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由 Mark Callaghan 提交于
Summary: Add --benchmarks=levelstats option to report per-level stats (#files, #bytes) Change readwhilewriting test to report response time for writes but exclude them from the stats merged by all threads. Prevent "NaN" in stats output by preventing division by 0. Remove "o" file I committed by mistake. Task ID: # Blame Rev: Test Plan: make check Revert Plan: Database Impact: Memcache Impact: Other Notes: EImportant: - begin *PUBLIC* platform impact section - Bugzilla: # - end platform impact - Reviewers: dhruba Reviewed By: dhruba Differential Revision: https://reviews.facebook.net/D9513
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由 Abhishek Kona 提交于
Summary: Rocksdb can create 0 sized log files when it is opened and closed without any operations. The GetUpdatesSince fails currently if there is a log file of size zero. This diff fixes this. If there is a log file is 0, it is removed form the probable_file_list Test Plan: unit test Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9507
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- 08 3月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Summary: If there is an error while writing an edit to the manifest file, the manifest file is closed and reopened to check if the edit made it in. However, if the re-opening of the manifest is unsuccessful and options.paranoid_checks is set t true, then the db refuses to accept new puts, effectively putting the db in readonly mode. In a future diff, I would like to make the default value of paranoid_check to true. Test Plan: make check Reviewers: sheki Reviewed By: sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D9201
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- 07 3月, 2013 2 次提交
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由 Abhishek Kona 提交于
Summary: Store the last flushed, seq no. in db_impl. Check against it in transaction Log iterator. Do not attempt to read ahead if we do not know if the data is flushed completely. Does not work if flush is disabled. Any ideas on fixing that? * Minor change, iter->Next is called the first time automatically for * the first time. Test Plan: existing test pass. More ideas on testing this? Planning to run some stress test. Reviewers: dhruba, heyongqiang CC: leveldb Differential Revision: https://reviews.facebook.net/D9087
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由 Dhruba Borthakur 提交于
Summary: The compaction process zeros out sequence numbers if the output is part of the bottommost level. The Slice is supposed to refer to an immutable data buffer. The merger that implements the priority queue while reading kvs as the input of a compaction run reies on this fact. The bug was that were updating the sequence number of a record in-place and that was causing suceeding invocations of the merger to return kvs in arbitrary order of sequence numbers. The fix is to copy the key to a local memory buffer before setting its seqno to 0. Test Plan: Set Options.purge_redundant_kvs_while_flush = false and then run db_stress --ops_per_thread=1000 --max_key=320 Reviewers: emayanke, sheki Reviewed By: emayanke CC: leveldb Differential Revision: https://reviews.facebook.net/D9147
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- 04 3月, 2013 2 次提交
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由 Mark Callaghan 提交于
Summary: This adds the rate_delay_limit_milliseconds option to make the delay configurable in MakeRoomForWrite when the max compaction score is too high. This delay is called the Ln slowdown. This change also counts the Ln slowdown per level to make it possible to see where the stalls occur. From IO-bound performance testing, the Level N stalls occur: * with compression -> at the largest uncompressed level. This makes sense because compaction for compressed levels is much slower. When Lx is uncompressed and Lx+1 is compressed then files pile up at Lx because the (Lx,Lx+1)->Lx+1 compaction process is the first to be slowed by compression. * without compression -> at level 1 Task ID: #1832108 Blame Rev: Test Plan: run with real data, added test Revert Plan: Database Impact: Memcache Impact: Other Notes: EImportant: - begin *PUBLIC* platform impact section - Bugzilla: # - end platform impact - Reviewers: dhruba Reviewed By: dhruba Differential Revision: https://reviews.facebook.net/D9045
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由 Dhruba Borthakur 提交于
Summary: Rocks accumulates recent writes and deletes in the in-memory memtable. When the memtable is full, it writes the contents on the memtable to a file in L0. This patch removes redundant records at the time of the flush. If there are multiple versions of the same key in the memtable, then only the most recent one is dumped into the output file. The purging of redundant records occur only if the most recent snapshot is earlier than the earliest record in the memtable. Should we switch on this feature by default or should we keep this feature turned off in the default settings? Test Plan: Added test case to db_test.cc Reviewers: sheki, vamsi, emayanke, heyongqiang Reviewed By: sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D8991
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- 27 2月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Summary: There was an artifical limit of 50K files per database. This is insifficient if the database is 1 TB in size and each file is 2 MB. Test Plan: make check Reviewers: sheki, emayanke Reviewed By: emayanke CC: leveldb Differential Revision: https://reviews.facebook.net/D8919
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- 23 2月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: just record time consumed in compaction Test Plan: compile Reviewers: dhruba Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D8781
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- 22 2月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: * Counters for bytes read and write. as a part of this diff, I want to=> * Measure compaction times. @dhruba can you point which function, should * I time to get Compaction-times. Was looking at CompactRange. Test Plan: db_test Reviewers: dhruba, emayanke CC: leveldb Differential Revision: https://reviews.facebook.net/D8763
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- 21 2月, 2013 1 次提交
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由 Abhishek Kona 提交于
Summary: * Introduce is histogram in statistics.h * stop watch to measure time. * introduce two timers as a poc. Replaced NULL with nullptr to fight some lint errors Should be useful for google. Test Plan: ran db_bench and check stats. make all check Reviewers: dhruba, heyongqiang Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D8637
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- 19 2月, 2013 2 次提交
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由 Dhruba Borthakur 提交于
Summary: The sequence numbers in each record eat up plenty of space on storage. The optimization zeroes out sequence numbers on kvs in the Lmax layer that are earlier than the earliest snapshot. Test Plan: Unit test attached. Differential Revision: https://reviews.facebook.net/D8619
- 16 2月, 2013 1 次提交
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由 amayank 提交于
Summary: flush_on_destroy has a default value of false and the memtable is flushed in the dbimpl-destructor only when that is set to true. Because we want the memtable to be flushed everytime that the destructor is called(db is closed) and the cases where we work with the memtable only are very less it is a good idea to give this a default value of true. Thus the put from ldb wil have its data flushed to disk in the destructor and the next Get will be able to read it when opened with OpenForReadOnly. The reason that ldb could read the latest value when the db was opened in the normal Open mode is that the Get from normal Open first reads the memtable and directly finds the latest value written there and the Get from OpenForReadOnly doesn't have access to the memtable (which is correct because all its Put/Modify) are disabled Test Plan: make all; ldb put and get and scans Reviewers: dhruba, heyongqiang, sheki Reviewed By: heyongqiang CC: kosievdmerwe, zshao, dilipj, kailiu Differential Revision: https://reviews.facebook.net/D8631
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- 05 2月, 2013 1 次提交
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由 Kai Liu 提交于
Summary: * Add a SplitByTTLLogger to enable this feature. In this diff I implemented generalized AutoSplitLoggerBase class to simplify the development of such classes. * Refactor the existing AutoSplitLogger and fix several bugs. Test Plan: * Added a unit tests for different types of "auto splitable" loggers individually. * Tested the composited logger which allows the log files to be splitted by both TTL and log size. Reviewers: heyongqiang, dhruba Reviewed By: heyongqiang CC: zshao, leveldb Differential Revision: https://reviews.facebook.net/D8037
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