rocksdb

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

sdong 462796697c dynamic_bloom: replace some divide (remainder) operations with shifts in locality mode, and other improvements Summary: This patch changes meaning of options.bloom_locality: 0 means disable cache line optimization and any positive number means use CACHE_LINE_SIZE as block size (the previous behavior is the block size will be CACHE_LINE_SIZE*options.bloom_locality). By doing it, the divide operations inside a block can be replaced by a shift. Performance is improved: https://reviews.facebook.net/P471 Also, improve the basic algorithm in two ways: (1) make sure num of blocks is an odd number (2) rotate bytes after every probe in locality mode. Since the divider is 2^n, unless doing it, we are never able to use all the bits. Improvements of false positive: https://reviews.facebook.net/P459 Test Plan: make all check Reviewers: ljin, haobo Reviewed By: haobo Subscribers: dhruba, yhchiang, igor, leveldb Differential Revision: https://reviews.facebook.net/D18843		11 years ago
build_tools	hdfs cleanup and compile test against CDH 4.4.	11 years ago
coverage	Disable the html-based coverage report by default	11 years ago
db	Only signal cond variable if need to	11 years ago
doc	doc: table_stats_collectors -> table_properties_collectors.	11 years ago
examples	Make it easier to start using RocksDB	11 years ago
hdfs	hdfs cleanup and compile test against CDH 4.4.	11 years ago
helpers/memenv	Expose in memory Env to the world	11 years ago
include	dynamic_bloom: replace some divide (remainder) operations with shifts in locality mode, and other improvements	11 years ago
java	[Java] Generalize dis-own native handle and refine dispose framework.	11 years ago
linters	allow lambda function syntax in cpplint	11 years ago
port	Make rocksdb work with all versions of lz4	11 years ago
table	forward iterator	11 years ago
third-party/rapidjson	Add rapidjson to RocksDB	11 years ago
tools	db_stress to add an option to periodically change background thread pool size.	11 years ago
util	dynamic_bloom: replace some divide (remainder) operations with shifts in locality mode, and other improvements	11 years ago
utilities	Make RateLimiting unit test less flakey	11 years ago
.arcconfig	Improve/fix bugs for the cpp linter	11 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Add .swp to gitignore	11 years ago
.travis.yml	Turn off travis notifications	11 years ago
CONTRIBUTING.md	New CLA form	11 years ago
HISTORY.md	Update HISTORY.md	11 years ago
INSTALL.md	Better INSTALL.md and Makefile rules	11 years ago
LICENSE	Fix copyright year	11 years ago
Makefile	Move master version to 3.2	11 years ago
PATENTS	Fix the patent format	11 years ago
README.md	Add build status to README.md	11 years ago
ROCKSDB_LITE.md	RocksDBLite	11 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 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 an 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 doc/index.html and 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/