A library that provides an embeddable, persistent key-value store for fast storage.
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Zhongyi Xie 44653c7b7a Revert "Avoid adding tombstones of the same file to RangeDelAggregato…
Summary:
…r multiple times"

This reverts commit e80709a33a.

lingbin PR https://github.com/facebook/rocksdb/pull/3635 is causing some performance regression for seekrandom workloads
I'm reverting the commit for now but feel free to submit new patches 😃

To reproduce the regression, you can run the following db_bench command
> ./db_bench --benchmarks=fillrandom,seekrandomwhilewriting --threads=1 --num=1000000 --reads=150000 --key_size=66 --value_size=1262 --statistics=0 --compression_ratio=0.5 --histogram=1 --seek_nexts=1 --stats_per_interval=1 --stats_interval_seconds=600 --max_background_flushes=4 --num_multi_db=1 --max_background_compactions=16 --seed=1522388277 -write_buffer_size=1048576 --level0_file_num_compaction_trigger=10000 --compression_type=none

write stats printed by db_bench:

Table | | | | | | | | | | |
 --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
revert commit | Percentiles: | P50: | 80.77  | P75: |102.94  |P99: | 1786.44 | P99.9: | 1892.39 |P99.99: 2645.10 |
keep commit | Percentiles: | P50: | 221.72 | P75: | 686.62 | P99: | 1842.57 | P99.9: | 1899.70|  P99.99: 2814.29|
Closes https://github.com/facebook/rocksdb/pull/3672

Differential Revision: D7463315

Pulled By: miasantreble

fbshipit-source-id: 8e779c87591127f2c3694b91a56d9b459011959d
2018-04-02 19:58:04 -07:00
buckifier Update buckifier and TARGETS 2018-03-30 14:26:53 -07:00
build_tools Enable compilation on OpenBSD 2018-03-19 12:30:05 -07:00
cache Comment out unused variables 2018-03-05 13:13:41 -08:00
cmake add missing config checks to CMakeLists.txt 2017-11-30 22:57:00 -08:00
coverage Suppress lint in old files 2018-01-29 12:56:42 -08:00
db Revert "Avoid adding tombstones of the same file to RangeDelAggregato… 2018-04-02 19:58:04 -07:00
docs Adding blog post for 5.10.2 release 2018-02-13 11:56:59 -08:00
env Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
examples Pinnableslice examples and blog post 2017-08-24 12:26:07 -07:00
hdfs Comment out unused variables 2018-03-05 13:13:41 -08:00
include/rocksdb Fixed small typos 2018-04-01 17:14:46 -07:00
java Fixed small typos 2018-04-01 17:14:46 -07:00
memtable InlineSkiplist: don't decode keys unnecessarily during comparisons 2018-03-23 12:14:30 -07:00
monitoring uint64_t and size_t changes to compile for iOS 2018-03-06 12:43:51 -08:00
options Align SST file data blocks to avoid spanning multiple pages 2018-03-26 20:26:10 -07:00
port CloseHandle docs says that the return is non-zero, does not say TRUE(1) 2018-03-20 18:43:02 -07:00
table Fix a leak in FilterBlockBuilder when adding prefix 2018-03-27 15:13:56 -07:00
third-party Comment out unused variables 2018-03-05 13:13:41 -08:00
tools Align SST file data blocks to avoid spanning multiple pages 2018-03-26 20:26:10 -07:00
util Update 64-bit shift in compression.h 2018-03-30 11:28:05 -07:00
utilities WritePrepared Txn: make recoverable state visible after flush 2018-03-28 12:12:08 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
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AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Fix race condition causing double deletion of ssts 2018-03-28 10:29:59 -07:00
CODE_OF_CONDUCT.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
CONTRIBUTING.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
COPYING Add GPLv2 as an alternative license. 2017-04-27 18:06:12 -07:00
DEFAULT_OPTIONS_HISTORY.md options.delayed_write_rate use the rate of rate_limiter by default. 2017-05-24 09:58:24 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Align SST file data blocks to avoid spanning multiple pages 2018-03-26 20:26:10 -07:00
INSTALL.md Enable compilation on OpenBSD 2018-03-19 12:30:05 -07:00
issue_template.md Add a template for issues 2017-09-29 11:41:28 -07:00
LANGUAGE-BINDINGS.md Add Nim to the list of language bindings 2018-01-29 09:57:46 -08:00
LICENSE.Apache Change RocksDB License 2017-07-15 16:11:23 -07:00
LICENSE.leveldb Add back the LevelDB license file 2017-07-16 18:42:18 -07:00
Makefile Allow rocksdbjavastatic to also be built as debug build 2018-03-28 16:30:36 -07:00
README.md Add dual-license info to README.md 2018-03-06 12:43:51 -08:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
src.mk Fix race condition causing double deletion of ssts 2018-03-28 10:29:59 -07:00
TARGETS Update buckifier and TARGETS 2018-03-30 14:26:53 -07:00
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USERS.md Added ProfaneDB 2017-11-19 10:11:44 -08:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00

RocksDB: A Persistent Key-Value Store for Flash and RAM Storage

Linux/Mac Build Status Windows Build status PPC64le Build Status

RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)

This code is a library that forms the core building block for a fast key value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it specially suitable for storing multiple terabytes of data in a single database.

Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples

See the github wiki for more explanation.

The public interface is in include/. Callers should not include or rely on the details of any other header files in this package. Those internal APIs may be changed without warning.

Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/

License

RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.