rocksdb

fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

sdong bb23bfe63c Fix a regression bug on total order seek with prefix enabled and range delete (#6028 ) Summary: Recent change https://github.com/facebook/rocksdb/pull/5861 mistakely use "prefix_extractor_ != nullptr" as the condition to determine whehter prefix bloom filter isused. It fails to consider read_options.total_order_seek, so it is wrong. The result is that an optimization for non-total-order seek is mistakely applied to total order seek, and introduces a bug in following corner case: Because of RangeDelete(), a file's largest key is extended. Seek key falls into the range deleted file, so level iterator seeks into the previous file without getting any key. The correct behavior is to place the iterator to the first key of the next file. However, an optimization is triggered and invalidates the iterator because it is out of the prefix range, causing wrong results. This behavior is reproduced in the unit test added. Fix the bug by setting prefix_extractor to be null if total order seek is used. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6028 Test Plan: Add a unit test which fails without the fix. Differential Revision: D18479063 fbshipit-source-id: ac075f013029fcf69eb3a598f14c98cce3e810b3		5 years ago
buckifier	Add clarifying/instructive header to TARGETS and defs.bzl	5 years ago
build_tools	Misc hashing updates / upgrades (#5909 )	5 years ago
cache	Misc hashing updates / upgrades (#5909 )	5 years ago
cmake	cmake: s/SNAPPY_LIBRARIES/snappy_LIBRARIES/ (#5687 )	5 years ago
coverage	Fix interpreter lines for files with python2-only syntax.	5 years ago
db	Fix a regression bug on total order seek with prefix enabled and range delete (#6028 )	5 years ago
docs	Blog post for write_unprepared (#5711 )	5 years ago
env	Add Env::SanitizeEnvOptions (#5885 )	5 years ago
examples	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
file	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
hdfs	Add copyright headers per FB open-source checkup tool. (#5199 )	6 years ago
include/rocksdb	Batched MultiGet API for multiple column families (#5816 )	5 years ago
java	Fix the rocksjava release Vagrant build on CentOS (#5901 )	5 years ago
logging	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
memory	Charge block cache for cache internal usage (#5797 )	5 years ago
memtable	Misc hashing updates / upgrades (#5909 )	5 years ago
monitoring	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
options	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
port	Fix block cache ID uniqueness for Windows builds (#5844 )	5 years ago
table	Fix BloomFilterPolicy changes for unsigned char (ARM) (#6024 )	5 years ago
test_util	Apply formatter to recent 200+ commits. (#5830 )	5 years ago
third-party	Refactor/consolidate legacy Bloom implementation details (#5784 )	5 years ago
tools	db_stress to cover SeekForPrev() (#6022 )	5 years ago
trace_replay	Misc hashing updates / upgrades (#5909 )	5 years ago
util	Add new persistent 64-bit hash (#5984 )	5 years ago
utilities	Batched MultiGet API for multiple column families (#5816 )	5 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Make buckifier python3 compatible (#5922 )	5 years ago
.lgtm.yml	Create lgtm.yml for LGTM.com C/C++ analysis (#4058 )	6 years ago
.travis.yml	Partial rebalance of TEST_GROUPs for Travis (#6010 )	5 years ago
.watchmanconfig	Added .watchmanconfig file to rocksdb repo (#5593 )	5 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	FilterPolicy consolidation, part 2/2 (#5966 )	5 years ago
CODE_OF_CONDUCT.md	Adopt Contributor Covenant	5 years ago
CONTRIBUTING.md	Add Code of Conduct	7 years ago
COPYING	Add GPLv2 as an alternative license.	8 years ago
DEFAULT_OPTIONS_HISTORY.md	options.delayed_write_rate use the rate of rate_limiter by default.	8 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Batched MultiGet API for multiple column families (#5816 )	5 years ago
INSTALL.md	Update the version of the dependencies used by the RocksJava static build (#4761 )	6 years ago
LANGUAGE-BINDINGS.md	LANGUAGE-BINDINGS.md: mention python-rocksdb	6 years ago
LICENSE.Apache	Change RocksDB License	7 years ago
LICENSE.leveldb	Add back the LevelDB license file	7 years ago
Makefile	Download bzip2 packages from sourceforge (#5995 )	5 years ago
README.md	Replaced some words (#5877 )	5 years ago
ROCKSDB_LITE.md	Fix some typos in comments and docs.	7 years ago
TARGETS	Add clarifying/instructive header to TARGETS and defs.bzl	5 years ago
USERS.md	Add avrio to USERS.md (#5748 )	5 years ago
Vagrantfile	Adding CentOS 7 Vagrantfile & build script	7 years ago
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 )	6 years ago
appveyor.yml	New API to get all merge operands for a Key (#5604 )	5 years ago
defs.bzl	Add clarifying/instructive header to TARGETS and defs.bzl	5 years ago
issue_template.md	Add a template for issues	7 years ago
src.mk	FilterPolicy consolidation, part 2/2 (#5966 )	5 years ago
thirdparty.inc	Fix build jemalloc api (#5470 )	5 years ago

README.md

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

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 especially 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.