Summary:
MemTableInserter default constructs Post processing info
std::map. However, on Windows with 2015 STL the default
constructed map still dynamically allocates one node
which shows up on a profiler and we loose ~40% throughput
on fillrandom benchmark.
Solution: declare a map as std::aligned storage and optionally
construct.
This addresses https://github.com/facebook/rocksdb/issues/1976
Before:
-------------------------------------------------------------------
Initializing RocksDB Options from command-line flags
DB path: [k:\data\BulkLoadRandom_10M_fillonly]
fillrandom : 2.775 micros/op 360334 ops/sec; 280.4 MB/s
Microseconds per write:
Count: 10000000 Average: 2.7749 StdDev: 39.92
Min: 1 Median: 2.0826 Max: 26051
Percentiles: P50: 2.08 P75: 2.55 P99: 3.55 P99.9: 9.58 P99.99: 51.5**6
------------------------------------------------------
After:
Initializing RocksDB Options from command-line flags
DB path: [k:\data\BulkLoadRandom_10M_fillon
Closes https://github.com/facebook/rocksdb/pull/2011
Differential Revision: D4740823
Pulled By: siying
fbshipit-source-id: 1daaa2c
Summary:
PlainTable now supports non-mmap mode. We don't need to check it anymore.
Closes https://github.com/facebook/rocksdb/pull/1882
Differential Revision: D4751643
Pulled By: siying
fbshipit-source-id: ab14540
Summary:
Add a parameter to Checkpoint::CreateCheckpoint() so that flush can be skipped if total log file size is within a threshold.
Closes https://github.com/facebook/rocksdb/pull/1993
Differential Revision: D4719842
Pulled By: siying
fbshipit-source-id: 4f9d9e1
Summary:
Removed max_grandparent_overlap_factor from benchmark.sh since it is not a valid option anymore.
Closes https://github.com/facebook/rocksdb/pull/2015
Differential Revision: D4748229
Pulled By: lgalanis
fbshipit-source-id: c3869ea
Summary:
Previously, when DB write buffer size triggers, we always pick the CF with most data in its memtable to flush. This approach can minimize total flush happens. Change the behavior to always pick the oldest unflushed CF, which makes it the same behavior when max_total_wal_size hits. This approach will minimize size used by max_total_wal_size.
Closes https://github.com/facebook/rocksdb/pull/1987
Differential Revision: D4703214
Pulled By: siying
fbshipit-source-id: 9ff8b09
Summary:
in buffered io, the filesize_ is the real size.
Closes https://github.com/facebook/rocksdb/pull/1991
Differential Revision: D4711433
Pulled By: lightmark
fbshipit-source-id: ad604b9
Summary:
"DEPRECATED" is ambiguous. Make it clear that those options not supported won't take effect.
Closes https://github.com/facebook/rocksdb/pull/1995
Differential Revision: D4724241
Pulled By: siying
fbshipit-source-id: 1e812b8
Summary:
PinnableSlice
Summary:
Currently the point lookup values are copied to a string provided by the
user. This incures an extra memcpy cost. This patch allows doing point lookup
via a PinnableSlice which pins the source memory location (instead of
copying their content) and releases them after the content is consumed
by the user. The old API of Get(string) is translated to the new API
underneath.
Here is the summary for improvements:
value 100 byte: 1.8% regular, 1.2% merge values
value 1k byte: 11.5% regular, 7.5% merge values
value 10k byte: 26% regular, 29.9% merge values
The improvement for merge could be more if we extend this approach to
pin the merge output and delay the full merge operation until the user
actually needs it. We have put that for future work.
PS:
Sometimes we observe a small decrease in performance when switching from
t5452014 to this patch but with the old Get(string) API. The d
Closes https://github.com/facebook/rocksdb/pull/1756
Differential Revision: D4391738
Pulled By: maysamyabandeh
fbshipit-source-id: 6f3edd3
Summary:
The comparator param in SstFileWriter constructor is redundant as it already exists as a field in options. So the current SstFileWriter constructor should be deprecated in favor of a new one which does not take a comparator.
Note that the jni/java apis have not been touched yet.
Closes https://github.com/facebook/rocksdb/pull/1978
Differential Revision: D4685629
Pulled By: sagar0
fbshipit-source-id: 372ce96
Summary:
Add the flag --prefix to the sst_dump tool
This flag is similar to, and exclusive from, the --from flag.
--prefix=0x00FF will return all rows prefixed with 0x00FF.
The --to flag may also be specified and will work as expected.
These changes were used to help in debugging the power cycle corruption issue and theses changes were tested by scanning through a udb.
Closes https://github.com/facebook/rocksdb/pull/1984
Differential Revision: D4691814
Pulled By: reidHoruff
fbshipit-source-id: 027f261
Summary:
Fixing some bugs in MockEnv so it be actually used.
Closes https://github.com/facebook/rocksdb/pull/1914
Differential Revision: D4609923
Pulled By: maysamyabandeh
fbshipit-source-id: ca25735
Summary:
Without the cast, the build will break on Windows.
Closes https://github.com/facebook/rocksdb/pull/1982
Differential Revision: D4690462
Pulled By: ajkr
fbshipit-source-id: c493b6c
Summary:
This reverts commit d43adf21bb.
The patch has caused problems in regression tests. Will revert it for now until we figure how to debug the problems regression tests.
Closes https://github.com/facebook/rocksdb/pull/1975
Differential Revision: D4682880
Pulled By: maysamyabandeh
fbshipit-source-id: 84df83a
Summary:
It augments the regression benchmarks with a time command, parses the output, and print them to the SUMMARY.csv file.
I tested a variation of the script locally. Any idea how to do run a test that also involves writing to scuba tables?
Closes https://github.com/facebook/rocksdb/pull/1967
Differential Revision: D4679470
Pulled By: maysamyabandeh
fbshipit-source-id: 44dac30
Summary:
the 50%+ drained constraint wasn't working consistently in some of our test environments, maybe their resources are too low. relax the constraints a bit.
Closes https://github.com/facebook/rocksdb/pull/1970
Differential Revision: D4679419
Pulled By: ajkr
fbshipit-source-id: 3789cd8
Summary:
This fixes an issue when the most recent readers assume that alignment is always set even if direct io is off.
Also adjust slightly appveyor script to run db_basic_test cases concurrently.
Closes https://github.com/facebook/rocksdb/pull/1959
Differential Revision: D4671972
Pulled By: IslamAbdelRahman
fbshipit-source-id: 1886620
Summary:
This is the second split of this pull request: https://github.com/facebook/rocksdb/pull/1891 which includes only the builder part. The testing will be included in the third split, where the reader is also included.
Closes https://github.com/facebook/rocksdb/pull/1952
Differential Revision: D4660272
Pulled By: maysamyabandeh
fbshipit-source-id: 36b3cf0
Summary:
This PR is to support a way to iterate over all the keys that are just in memtables.
Closes https://github.com/facebook/rocksdb/pull/1953
Differential Revision: D4663500
Pulled By: sagar0
fbshipit-source-id: 144e177
Summary:
db_sst_test had been flaky occasionally in the following way: reached_max_space_on_compaction can in very rare cases be 0. This happens when the limit on maximum allowable space set using SetMaxAllowedSpaceUsage is hit during flush for all test db sizes (1,2,4,8 and 10MB).The fix clears the error returned when the the space limit is reached during flush. This ensures that the compaction call back will always be called. The runtime is increased slightly because the 1MB loop writes more data and hits the limit during multiple flushes until compaction is scheduled.
Closes https://github.com/facebook/rocksdb/pull/1861
Differential Revision: D4557396
Pulled By: lgalanis
fbshipit-source-id: ff778d1
Summary:
Relating to #1903:
In MaybeFlushColumnFamilies() we want to modify the 'getting_flushed' flag before releasing the db mutex when SwitchMemtable() is called.
The following 2 actions need to be atomic in MaybeFlushColumnFamilies()
- getting_flushed is false on oldest log
- we determine that all CFs can be flushed to successfully release oldest log
- we set getting_flushed = true on the oldest log.
-------
- getting_flushed is false on oldest log
- we determine that all CFs can NOT be flushed to successfully release oldest log
- we set unable_to_flush_oldest_log_ = true on the oldest log.
#### In the 2pc case:
T1 enters function but is unable to flush all CFs to release log
T1 sets unable_to_flush_oldest_log_ = true
T1 begins flushing all CFs possible
T2 enters function but is unable to flush all CFs to release log
T2 sees unable_to_flush_oldes_log_ has been set so exits
T3 enters function and will be able to flush all CFs to release oldest log
T3 sets getting_flushed = true on oldes
Closes https://github.com/facebook/rocksdb/pull/1909
Differential Revision: D4646235
Pulled By: reidHoruff
fbshipit-source-id: c8d0447
Summary:
After we have db_basic_test and external_sst_file_basic_test, we don't need to run db_test and external_sst_file_test in Travis's MAC OS run anymore. Move it out.
Closes https://github.com/facebook/rocksdb/pull/1940
Differential Revision: D4659361
Pulled By: siying
fbshipit-source-id: e64e291
Summary:
Note: Using the default operator= is an unsafe approach for Options since it destructs shared_ptr in
the same order of their creation, in contrast to destructors which
destructs them in the opposite order of creation. One particular problme is
that the cache destructor might invoke callback functions that use Option
members such as statistics. To work around this problem, we manually call
destructor of table_facotry which eventually clears the block cache.
Closes https://github.com/facebook/rocksdb/pull/1950
Differential Revision: D4655473
Pulled By: maysamyabandeh
fbshipit-source-id: 6c4bbff
Summary:
Also extracted the common logic into a base class, BackupableCommand.
Closes https://github.com/facebook/rocksdb/pull/1939
Differential Revision: D4630121
Pulled By: ajkr
fbshipit-source-id: 04bb067
Summary:
fix when elapsed time spans non-integral number of intervals since the rate limiter may still be drained during a partial interval.
Closes https://github.com/facebook/rocksdb/pull/1948
Differential Revision: D4651304
Pulled By: ajkr
fbshipit-source-id: b1f9e70
Summary:
This is the metric I plan to use for adaptive rate limiting. The statistics are updated only if the rate limiter is drained by flush or compaction. I believe (but am not certain) that this is the normal case.
The Statistics object is passed in RateLimiter::Request() to avoid requiring changes to client code, which would've been necessary if we passed it in the RateLimiter constructor.
Closes https://github.com/facebook/rocksdb/pull/1946
Differential Revision: D4646489
Pulled By: ajkr
fbshipit-source-id: d8e0161
Siying Dong