- 23 8月, 2013 2 次提交
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https://reviews.facebook.net/D10917由 Xing Jin 提交于
Summary: Pull Mark's patch and slightly revise it. I revised another place in db_impl.cc with similar new formula. Test Plan: make all check. Also run "time ./db_bench --num=2500000000 --numdistinct=2200000000". It has run for 20+ hours and hasn't finished. Looks good so far: Installed stack trace handler for SIGILL SIGSEGV SIGBUS SIGABRT LevelDB: version 2.0 Date: Tue Aug 20 23:11:55 2013 CPU: 32 * Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz CPUCache: 20480 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 2500000000 RawSize: 276565.6 MB (estimated) FileSize: 157356.3 MB (estimated) Write rate limit: 0 Compression: snappy WARNING: Assertions are enabled; benchmarks unnecessarily slow ------------------------------------------------ DB path: [/tmp/leveldbtest-3088/dbbench] fillseq : 7202.000 micros/op 138 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] fillsync : 7148.000 micros/op 139 ops/sec; (2500000 ops) DB path: [/tmp/leveldbtest-3088/dbbench] fillrandom : 7105.000 micros/op 140 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] overwrite : 6930.000 micros/op 144 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] readrandom : 1.020 micros/op 980507 ops/sec; (0 of 2500000000 found) DB path: [/tmp/leveldbtest-3088/dbbench] readrandom : 1.021 micros/op 979620 ops/sec; (0 of 2500000000 found) DB path: [/tmp/leveldbtest-3088/dbbench] readseq : 113.000 micros/op 8849 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] readreverse : 102.000 micros/op 9803 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] Created bg thread 0x7f0ac17f7700 compact : 111701.000 micros/op 8 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] readrandom : 1.020 micros/op 980376 ops/sec; (0 of 2500000000 found) DB path: [/tmp/leveldbtest-3088/dbbench] readseq : 120.000 micros/op 8333 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] readreverse : 29.000 micros/op 34482 ops/sec; DB path: [/tmp/leveldbtest-3088/dbbench] ... finished 618100000 ops Reviewers: MarkCallaghan, haobo, dhruba, chip Reviewed By: dhruba Differential Revision: https://reviews.facebook.net/D12441
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由 Simha Venkataramaiah 提交于
Summary: An api to query the level, key ranges, size etc for each SST file and an api to delete a specific file from the db and all associated state in the bookkeeping datastructures. Notes: Editing the manifest version does not release the obsolete files right away. However deleting the file directly will mess up the iterator. We may need a more aggressive/timely file deletion api. I have used std::unique_ptr - will switch to boost:: since this is external. thoughts? Unit test is fragile right now as it expects the compaction at certain levels. Test Plan: unittest Reviewers: dhruba, vamsi, emayanke CC: zshao, leveldb, haobo Task ID: # Blame Rev:
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- 21 8月, 2013 1 次提交
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由 Deon Nicholas 提交于
Test Plan: - make all check; - make release; - make stringappend_test; ./stringappend_test Reviewers: haobo, emayanke Reviewed By: haobo CC: leveldb, kailiu Differential Revision: https://reviews.facebook.net/D12381
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- 20 8月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Summary: Also expanded class LogFile to have startSequene and FileSize and exposed it publicly Test Plan: make all check Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D12087
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- 16 8月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Summary: statistic for sequence number is needed by wormhole. setTickerCount is demanded for this statistic. I can't simply recordTick(max_sequence) when db recovers because the statistic iobject is owned by client and may/may not be reset during reopen. Eg. statistic is reset in mcrocksdb whereas it is not in db_stress. Therefore it is best to go with setTickerCount Test Plan: ./db_stress ... --statistics=1 and observed expected sequence number Reviewers: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D12327
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- 15 8月, 2013 1 次提交
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由 Xing Jin 提交于
Summary: Minor fix to current codes, including: coding style, output format, comments. No major logic change. There are only 2 real changes, please see my inline comments. Test Plan: make all check Reviewers: haobo, dhruba, emayanke Differential Revision: https://reviews.facebook.net/D12297
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- 14 8月, 2013 3 次提交
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由 Mayank Agarwal 提交于
Summary: With Merge returning bool, it can keep failing silently(eg. While faling to fetch timestamp in TTL). We need to detect this through a rocksdb counter which can get bumped whenever Merge returns false. This will also be super-useful for the mcrocksdb-counter service where Merge may fail. Added a counter NUMBER_MERGE_FAILURES and appropriately updated db/merge_helper.cc I felt that it would be better to directly add counter-bumping in Merge as a default function of MergeOperator class but user should not be aware of this, so this approach seems better to me. Test Plan: make all check Reviewers: dnicholas, haobo, dhruba, vamsi CC: leveldb Differential Revision: https://reviews.facebook.net/D12129
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由 Tyler Harter 提交于
Summary: Similar to v2 (db and table code understands prefixes), but use ReadOptions as in v3. Also, make the CreateFilter code faster and cleaner. Test Plan: make db_test; export LEVELDB_TESTS=PrefixScan; ./db_test Reviewers: dhruba Reviewed By: dhruba CC: haobo, emayanke Differential Revision: https://reviews.facebook.net/D12027
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由 sumeet 提交于
Summary: If we have same compaction filter for each compaction, application cannot know about the different compaction processes. Later on, we can put in more details in compaction filter for the application to consume and use it according to its needs. For e.g. In the universal compaction, we have a compaction process involving all the files while others don't involve all the files. Applications may want to collect some stats only when during full compaction. Test Plan: run existing unit tests Reviewers: haobo, dhruba Reviewed By: dhruba CC: xinyaohu, leveldb Differential Revision: https://reviews.facebook.net/D12057
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- 10 8月, 2013 2 次提交
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由 Dhruba Borthakur 提交于
Summary: The pre-existing code was purging a DeleteMarker if thay key did not exist in deeper levels. But in the Universal Compaction Style, all files are in Level0. For compaction runs that did not include the earliest file, we were erroneously purging the DeleteMarkers. The fix is to purge DeleteMarkers only if the compaction includes the earlist file. Test Plan: DBTest.Randomized triggers this code path. Differential Revision: https://reviews.facebook.net/D12081
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由 Xing Jin 提交于
Summary: Continue fixing existing unit tests for universal compaction. I have tried to apply universal compaction to all unit tests those haven't called ChangeOptions(). I left a few which are either apparently not applicable to universal compaction (because they check files/keys/values at level 1 or above levels), or apparently not related to compaction (e.g., open a file, open a db). I also add a new unit test for universal compaction. Good news is I didn't see any bugs during this round. Test Plan: Ran "make all check" yesterday. Has rebased and is rerunning Reviewers: haobo, dhruba Differential Revision: https://reviews.facebook.net/D12135
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- 08 8月, 2013 1 次提交
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由 Xing Jin 提交于
Summary: This is the first step to fix unit tests and bugs for universal compactiion. I added universal compaction option to ChangeOptions(), and fixed all unit tests calling ChangeOptions(). Some of these tests obviously assume more than 1 level and check file number/values in level 1 or above levels. I set kSkipUniversalCompaction for these tests. The major bug I found is manual compaction with universal compaction never stops. I have put a fix for it. I have also set universal compaction as the default compaction and found at least 20+ unit tests failing. I haven't looked into the details. The next step is to check all unit tests without calling ChangeOptions(). Test Plan: make all check Reviewers: dhruba, haobo Differential Revision: https://reviews.facebook.net/D12051
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- 06 8月, 2013 3 次提交
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由 Deon Nicholas 提交于
Summary: Here are the major changes to the Merge Interface. It has been expanded to handle cases where the MergeOperator is not associative. It does so by stacking up merge operations while scanning through the key history (i.e.: during Get() or Compaction), until a valid Put/Delete/end-of-history is encountered; it then applies all of the merge operations in the correct sequence starting with the base/sentinel value. I have also introduced an "AssociativeMerge" function which allows the user to take advantage of associative merge operations (such as in the case of counters). The implementation will always attempt to merge the operations/operands themselves together when they are encountered, and will resort to the "stacking" method if and only if the "associative-merge" fails. This implementation is conjectured to allow MergeOperator to handle the general case, while still providing the user with the ability to take advantage of certain efficiencies in their own merge-operator / data-structure. NOTE: This is a preliminary diff. This must still go through a lot of review, revision, and testing. Feedback welcome! Test Plan: -This is a preliminary diff. I have only just begun testing/debugging it. -I will be testing this with the existing MergeOperator use-cases and unit-tests (counters, string-append, and redis-lists) -I will be "desk-checking" and walking through the code with the help gdb. -I will find a way of stress-testing the new interface / implementation using db_bench, db_test, merge_test, and/or db_stress. -I will ensure that my tests cover all cases: Get-Memtable, Get-Immutable-Memtable, Get-from-Disk, Iterator-Range-Scan, Flush-Memtable-to-L0, Compaction-L0-L1, Compaction-Ln-L(n+1), Put/Delete found, Put/Delete not-found, end-of-history, end-of-file, etc. -A lot of feedback from the reviewers. Reviewers: haobo, dhruba, zshao, emayanke Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11499
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由 Jim Paton 提交于
Summary: This diff adds histogram stats for soft_rate_limit stalls. It also renames the old rate_limit stats to hard_rate_limit. Test Plan: make -j32 check Reviewers: dhruba, haobo, MarkCallaghan Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D12021
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由 Jim Paton 提交于
Summary: This diff adds support for both soft and hard rate limiting. The following changes are included: 1) Options.rate_limit is renamed to Options.hard_rate_limit. 2) Options.rate_limit_delay_milliseconds is renamed to Options.rate_limit_delay_max_milliseconds. 3) Options.soft_rate_limit is added. 4) If the maximum compaction score is > hard_rate_limit and rate_limit_delay_max_milliseconds == 0, then writes are delayed by 1 ms at a time until the max compaction score falls below hard_rate_limit. 5) If the max compaction score is > soft_rate_limit but <= hard_rate_limit, then writes are delayed by 0-1 ms depending on how close we are to hard_rate_limit. 6) Users can disable 4 by setting hard_rate_limit = 0. They can add a limit to the maximum amount of time waited by setting rate_limit_delay_max_milliseconds > 0. Thus, the old behavior can be preserved by setting soft_rate_limit = 0, which is the default. Test Plan: make -j32 check ./db_stress Reviewers: dhruba, haobo, MarkCallaghan Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D12003
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- 02 8月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Expand KeyMayExist to return the proper value if it can be found in memory and also check block_cache Summary: Removed KeyMayExistImpl because KeyMayExist demanded Get like semantics now. Removed no_io from memtable and imm because we need the proper value now and shouldn't just stop when we see Merge in memtable. Added checks to block_cache. Updated documentation and unit-test Test Plan: make all check;db_stress for 1 hour Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11853
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- 01 8月, 2013 2 次提交
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由 Jim Paton 提交于
Summary: Currently, when a certain number of level0 files (level0_slowdown_writes_trigger) are present, RocksDB will slow down each write by 1ms. There is a second limit of level0 files at which RocksDB will stop writes altogether (level0_stop_writes_trigger). This patch enables the user to supply a third parameter specifying the number of files at which Rocks will start slowing down writes (level0_start_slowdown_writes). When this number is reached, Rocks will slow down writes as a quadratic function of level0_slowdown_writes_trigger - num_level0_files. For some workloads, this improves latency and throughput. I will post some stats momentarily in https://our.intern.facebook.com/intern/tasks/?t=2613384. Test Plan: make -j32 check ./db_stress ./db_bench Reviewers: dhruba, haobo, MarkCallaghan, xjin Reviewed By: xjin CC: leveldb, xjin, zshao Differential Revision: https://reviews.facebook.net/D11859
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由 Xing Jin 提交于
Summary: Add an option for arena block size, default value 4096 bytes. Arena will allocate blocks with such size. I am not sure about passing parameter to skiplist in the new virtualized framework, though I talked to Jim a bit. So add Jim as reviewer. Test Plan: new unit test, I am running db_test. For passing paramter from configured option to Arena, I tried tests like: TEST(DBTest, Arena_Option) { std::string dbname = test::TmpDir() + "/db_arena_option_test"; DestroyDB(dbname, Options()); DB* db = nullptr; Options opts; opts.create_if_missing = true; opts.arena_block_size = 1000000; // tested 99, 999999 Status s = DB::Open(opts, dbname, &db); db->Put(WriteOptions(), "a", "123"); } and printed some debug info. The results look good. Any suggestion for such a unit-test? Reviewers: haobo, dhruba, emayanke, jpaton Reviewed By: dhruba CC: leveldb, zshao Differential Revision: https://reviews.facebook.net/D11799
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- 30 7月, 2013 2 次提交
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由 Jim Paton 提交于
Summary: After my patch for stall histograms, there are redundant calls to NowMicros() by both the stop watches and DBImpl::MakeRoomForWrites. So I removed the redundant calls such that the information is gotten from the stopwatch. Test Plan: make clean make -j32 check Reviewers: dhruba, haobo, MarkCallaghan Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11883
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由 Jim Paton 提交于
Summary: Previously, statistics are kept on how much time is spent on stalls of different types. This patch adds support for keeping number of stalls of each type. For example, instead of just reporting how many microseconds are spent waiting for memtables to be compacted, it will also report how many times a write stalled for that to occur. Test Plan: make -j32 check ./db_stress # Not really sure what else should be done... Reviewers: dhruba, MarkCallaghan, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11841
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- 25 7月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Revert 6fbe4e98: If disable wal is set, then batch commits are avoided Summary: Revert "If disable wal is set, then batch commits are avoided" because keeping the mutex while inserting into the skiplist means that readers and writes are all serialized on the mutex. Test Plan: Reviewers: CC: Task ID: # Blame Rev:
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- 24 7月, 2013 3 次提交
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由 Jim Paton 提交于
Summary: This diff virtualizes the skiplist interface so that users can provide their own implementation of a backing store for MemTables. Eventually, the backing store will be responsible for its own synchronization, allowing users (and us) to experiment with different lockless implementations. Test Plan: make clean make -j32 check ./db_stress Reviewers: dhruba, emayanke, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11739
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由 Dhruba Borthakur 提交于
Summary: rocksdb uses batch commit to write to transaction log. But if disable wal is set, then writes to transaction log are anyways avoided. In this case, there is not much value-add to batch things, batching can cause unnecessary delays to Puts(). This patch avoids batching when disableWal is set. Test Plan: make check. I am running db_stress now. Reviewers: haobo Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11763
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由 Mayank Agarwal 提交于
Summary: Introduced KeyMayExist checking during writebatch-delete and removed from Outer Delete API because it uses writebatch-delete. Added code to skip getting Table from disk if not already present in table_cache. Some renaming of variables. Introduced KeyMayExistImpl which allows checking since specified sequence number in GetImpl useful to check partially written writebatch. Changed KeyMayExist to not be pure virtual and provided a default implementation. Expanded unit-tests in db_test to check appropriately. Ran db_stress for 1 hour with ./db_stress --max_key=100000 --ops_per_thread=10000000 --delpercent=50 --filter_deletes=1 --statistics=1. Test Plan: db_stress;make check Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb, xjin Differential Revision: https://reviews.facebook.net/D11745
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- 23 7月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: as title Test Plan: make check; Reviewers: xjin CC: leveldb Differential Revision: https://reviews.facebook.net/D11751
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- 20 7月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: As title. This diff added an option reduce_level to CompactRange. When set to true, it will try to move the files back to the minimum level sufficient to hold the data set. Note that the default is set to true now, just to excerise it in all existing tests. Will set the default to false before check-in, for backward compatibility. Test Plan: make check; Reviewers: dhruba, emayanke CC: leveldb Differential Revision: https://reviews.facebook.net/D11553
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- 12 7月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Summary: Wrote a new function in db_impl.c-CheckKeyMayExist that calls Get but with a new parameter turned on which makes Get return false only if bloom filters can guarantee that key is not in database. Delete calls this function and if the option- deletes_use_filter is turned on and CheckKeyMayExist returns false, the delete will be dropped saving: 1. Put of delete type 2. Space in the db,and 3. Compaction time Test Plan: make all check; will run db_stress and db_bench and enhance unit-test once the basic design gets approved Reviewers: dhruba, haobo, vamsi Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11607
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- 09 7月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: Replication logic would be simplifeid if we can guarantee that write sequence number is always contiguous, even if write failure occurs. Dhruba and I looked at the sequence number generation part of the code. It seems fixable. Note that if WAL was successful and insert into memtable was not, we would be in an unfortunate state. The approach in this diff is : IO error is expected and error status will be returned to client, sequence number will not be advanced; In-mem error is not expected and we panic. Test Plan: make check; db_stress Reviewers: dhruba, sheki CC: leveldb Differential Revision: https://reviews.facebook.net/D11439
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- 04 7月, 2013 1 次提交
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由 Dhruba Borthakur 提交于
Summary: All the universal compaction parameters are encapsulated in a new file universal_compaction.h Test Plan: make check
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- 01 7月, 2013 2 次提交
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由 Dhruba Borthakur 提交于
Summary: There is a new option called hybrid_mode which, when switched on, causes HBase style compactions. Files from L0 are compacted back into L0. This meat of this compaction algorithm is in PickCompactionHybrid(). All files reside in L0. That means all files have overlapping keys. Each file has a time-bound, i.e. each file contains a range of keys that were inserted around the same time. The start-seqno and the end-seqno refers to the timeframe when these keys were inserted. Files that have contiguous seqno are compacted together into a larger file. All files are ordered from most recent to the oldest. The current compaction algorithm starts to look for candidate files starting from the most recent file. It continues to add more files to the same compaction run as long as the sum of the files chosen till now is smaller than the next candidate file size. This logic needs to be debated and validated. The above logic should reduce write amplification to a large extent... will publish numbers shortly. Test Plan: dbstress runs for 6 hours with no data corruption (tested so far). Differential Revision: https://reviews.facebook.net/D11289
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由 Dhruba Borthakur 提交于
Summary: There is a new option called hybrid_mode which, when switched on, causes HBase style compactions. Files from L0 are compacted back into L0. This meat of this compaction algorithm is in PickCompactionHybrid(). All files reside in L0. That means all files have overlapping keys. Each file has a time-bound, i.e. each file contains a range of keys that were inserted around the same time. The start-seqno and the end-seqno refers to the timeframe when these keys were inserted. Files that have contiguous seqno are compacted together into a larger file. All files are ordered from most recent to the oldest. The current compaction algorithm starts to look for candidate files starting from the most recent file. It continues to add more files to the same compaction run as long as the sum of the files chosen till now is smaller than the next candidate file size. This logic needs to be debated and validated. The above logic should reduce write amplification to a large extent... will publish numbers shortly. Test Plan: dbstress runs for 6 hours with no data corruption (tested so far). Differential Revision: https://reviews.facebook.net/D11289
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- 19 6月, 2013 2 次提交
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由 Abhishek Kona 提交于
Summary: $title Test Plan: db_bench --statistics=1 Reviewers: haobo Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11373
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由 Dhruba Borthakur 提交于
Summary: Merge multiple multiple memtables in memory before writing it out to a file in L0. There is a new config parameter min_write_buffer_number_to_merge that specifies the number of write buffers that should be merged together to a single file in storage. The system will not flush wrte buffers to storage unless at least these many buffers have accumulated in memory. The default value of this new parameter is 1, which means that a write buffer will be immediately flushed to disk as soon it is ready. Test Plan: make check Differential Revision: https://reviews.facebook.net/D11241
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- 15 6月, 2013 1 次提交
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由 Haobo Xu 提交于
Summary: This hopefully gives the right semantics to compaction filter. Will write a small wiki to explain the ideas. Test Plan: make check; db_stress Reviewers: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11121
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- 13 6月, 2013 2 次提交
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由 Deon Nicholas 提交于
Summary: Preliminary! Introduced the --use_multiget=1 and --keys_per_multiget=n flags for db_bench. Also updated and tested the ReadRandom() method to include an option to use multiget. By default, keys_per_multiget=100. Preliminary tests imply that multiget is at least 1.25x faster per key than regular get. Will continue adding Multiget for ReadMissing, ReadHot, RandomWithVerify, ReadRandomWriteRandom; soon. Will also think about ways to better verify benchmarks. Test Plan: 1. make db_bench 2. ./db_bench --benchmarks=fillrandom 3. ./db_bench --benchmarks=readrandom --use_existing_db=1 --use_multiget=1 --threads=4 --keys_per_multiget=100 4. ./db_bench --benchmarks=readrandom --use_existing_db=1 --threads=4 5. Verify ops/sec (and 1000000 of 1000000 keys found) Reviewers: haobo, MarkCallaghan, dhruba Reviewed By: MarkCallaghan CC: leveldb Differential Revision: https://reviews.facebook.net/D11127
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由 Haobo Xu 提交于
Summary: This diff simplifies EnvOptions by treating it as POD, similar to Options. - virtual functions are removed and member fields are accessed directly. - StorageOptions is removed. - Options.allow_readahead and Options.allow_readahead_compactions are deprecated. - Unused global variables are removed: useOsBuffer, useFsReadAhead, useMmapRead, useMmapWrite Test Plan: make check; db_stress Reviewers: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11175
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- 10 6月, 2013 1 次提交
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由 Mayank Agarwal 提交于
Summary: Without this files could be written out to a level greater than the maximum level possible and is the source of the segfaults that wormhole awas getting. The sequence of steps that was followed: 1. WriteLevel0Table was called when memtable was to be flushed for a file. 2. PickLevelForMemTableOutput was called to determine the level to which this file should be pushed. 3. PickLevelForMemTableOutput returned a wrong result because max_mem_compaction_level was equal to 2 even when num_levels was equal to 0. The fix to re-initialize max_mem_compaction_level based on num_levels passed seems correct. Test Plan: make all check; Also made a dummy file to mimic the wormhole-file behaviour which was causing the segfaults and found that the same segfault occurs without this change and not with this. Reviewers: dhruba, haobo Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11157
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- 06 6月, 2013 2 次提交
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由 Deon Nicholas 提交于
Summary: Implemented the MultiGet operator which takes in a list of keys and returns their associated values. Currently uses std::vector as its container data structure. Otherwise, it works identically to "Get". Test Plan: 1. make db_test ; compile it 2. ./db_test ; test it 3. make all check ; regress / run all tests 4. make release ; (optional) compile with release settings Reviewers: haobo, MarkCallaghan, dhruba Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D10875
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由 Abhishek Kona 提交于
Summary: Add stop watches around all sync calls. Test Plan: db_bench check if respective histograms are printed Reviewers: haobo, dhruba Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11073
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- 04 6月, 2013 1 次提交
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由 Mark Callaghan 提交于
Summary: Display separate values for read, write & total compaction IO. Display compaction amplification and write amplification. Add similar values for the period since the last call to GetProperty. Results since the server started are reported as "cumulative" stats. Results since the last call to GetProperty are reported as "interval" stats. Level Files Size(MB) Time(sec) Read(MB) Write(MB) Rn(MB) Rnp1(MB) Wnew(MB) Amplify Read(MB/s) Write(MB/s) Rn Rnp1 Wnp1 NewW Count Ln-stall ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- 0 7 13 21 0 211 0 0 211 0.0 0.0 10.1 0 0 0 0 113 0.0 1 79 157 88 993 989 198 795 194 9.0 11.3 11.2 106 405 502 97 14 0.0 2 19 36 5 63 63 37 27 36 2.4 12.3 12.2 19 14 32 18 12 0.0 >>>>>>>>>>>>>>>>>>>>>>>>> text below has been is new and/or reformatted Uptime(secs): 122.2 total, 0.9 interval Compaction IO cumulative (GB): 0.21 new, 1.03 read, 1.23 write, 2.26 read+write Compaction IO cumulative (MB/sec): 1.7 new, 8.6 read, 10.3 write, 19.0 read+write Amplification cumulative: 6.0 write, 11.0 compaction Compaction IO interval (MB): 5.59 new, 0.00 read, 5.59 write, 5.59 read+write Compaction IO interval (MB/sec): 6.5 new, 0.0 read, 6.5 write, 6.5 read+write Amplification interval: 1.0 write, 1.0 compaction >>>>>>>>>>>>>>>>>>>>>>>> text above is new and/or reformatted Stalls(secs): 90.574 level0_slowdown, 0.000 level0_numfiles, 10.165 memtable_compaction, 0.000 leveln_slowdown Task ID: # Blame Rev: Test Plan: make check, run db_bench Revert Plan: Database Impact: Memcache Impact: Other Notes: EImportant: - begin *PUBLIC* platform impact section - Bugzilla: # - end platform impact - Reviewers: haobo Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D11049
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