A library that provides an embeddable, persistent key-value store for fast storage.
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Andrew Kryczka ba0967b567 Reduce severity of too many levels log message (#5742)
Summary:
This condition is now a normal occurrence during write burst so there is
no need to warn the user about it. Here is a scenario where it happens
under completely normal conditions.

* Initially we have a DB of three levels (L0, L1, and L2) that is stable, i.e., compaction scores are all less than one.
* Now a write burst comes along. At first L0 blows up a bit in size as compaction hasn't had a chance to catch up.
* As a result of the above, `base_bytes_min` also increases since it is based on L0 size as of https://github.com/facebook/rocksdb/issues/4338
* If `base_bytes_min` increased enough (i.e., to be larger than L1), then we are shown the warning that the DB has more levels than necessary.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5742

Differential Revision: D17059221

fbshipit-source-id: e4a31d6eea42089a8d273095f19653991bd91bea
2019-08-26 15:00:43 -07:00
buckifier Change buckifier to support parameterized dependencies (#5648) 2019-08-02 10:55:17 -07:00
build_tools Port folly/synchronization/DistributedMutex to rocksdb (#5642) 2019-08-07 14:34:19 -07:00
cache Cleaned up and simplified LRU cache implementation (#5579) 2019-07-16 19:17:45 -07:00
cmake cmake: s/SNAPPY_LIBRARIES/snappy_LIBRARIES/ (#5687) 2019-08-16 15:49:23 -07:00
coverage Fix interpreter lines for files with python2-only syntax. 2019-07-09 10:51:37 -07:00
db Reduce severity of too many levels log message (#5742) 2019-08-26 15:00:43 -07:00
docs Blog post for write_unprepared (#5711) 2019-08-15 14:41:13 -07:00
env fix compile error: ‘FALLOC_FL_KEEP_SIZE’ undeclared (#5708) 2019-08-16 13:58:05 -07:00
examples Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
file New API to get all merge operands for a Key (#5604) 2019-08-06 14:26:44 -07:00
hdfs Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
include/rocksdb Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
java Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
logging Auto Roll Logger to add some extra checking to avoid segfault. (#5623) 2019-07-24 15:14:40 -07:00
memory Move some logging related files to logging/ (#5387) 2019-05-31 17:23:59 -07:00
memtable simplify include directive involving inttypes (#5402) 2019-06-06 13:56:07 -07:00
monitoring fix compiling with -DNPERF_CONTEXT (#5704) 2019-08-16 14:38:08 -07:00
options Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
port fix sign compare warnings (#5651) 2019-07-30 14:12:54 -07:00
table Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
test_util Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
third-party Fix TSAN failures in DistributedMutex tests (#5684) 2019-08-14 17:01:31 -07:00
tools Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
trace_replay Block cache analyzer: Support reading from human readable trace file. (#5679) 2019-08-09 13:13:54 -07:00
util Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
utilities Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Block cache simulator: Add pysim to simulate caches using reinforcement learning. (#5610) 2019-07-26 14:41:13 -07:00
.lgtm.yml Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
.travis.yml Switch Travis to Xenial build (#4789) 2019-06-17 10:20:02 -07:00
.watchmanconfig Added .watchmanconfig file to rocksdb repo (#5593) 2019-07-19 15:00:33 -07:00
appveyor.yml New API to get all merge operands for a Key (#5604) 2019-08-06 14:26:44 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -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
defs.bzl Change buckifier to support parameterized dependencies (#5648) 2019-08-02 10:55:17 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
INSTALL.md Update the version of the dependencies used by the RocksJava static build (#4761) 2018-12-18 20:25:43 -08:00
issue_template.md Add a template for issues 2017-09-29 11:41:28 -07:00
LANGUAGE-BINDINGS.md LANGUAGE-BINDINGS.md: mention python-rocksdb 2019-03-20 11:10:48 -07:00
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 Atomic Flush Crash Test also covers the case that WAL is enabled. (#5729) 2019-08-22 16:32:55 -07:00
README.md Add LevelDB repository link in the Readme 2019-04-01 18:19:09 -07:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
src.mk Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
TARGETS Refactor trimming logic for immutable memtables (#5022) 2019-08-23 13:55:34 -07:00
thirdparty.inc Fix build jemalloc api (#5470) 2019-06-24 17:40:32 -07:00
USERS.md Add Alluxio to USERS.md (#5434) 2019-06-13 12:25:26 -07:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md #5145 , rename port/dirent.h to port/port_dirent.h to avoid compile err when use port dir as header dir output (#5152) 2019-04-04 11:38:19 -07:00

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

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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.