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A library that provides an embeddable, persistent key-value store for fast storage.
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C++ 82.1%
Java 10.3%
C 2.5%
Python 1.7%
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sdong 983c93d731 VersionSet::Get(): Bring back the logic of skipping key range check when there are <=3 level 0 files 
Summary:
https://reviews.facebook.net/D17205 removed the logic of skipping file key range check when there are less than 3 level 0 files. This patch brings it back.

Other than that, add another small optimization to avoid to check all the levels if most higher levels don't have any file.

Test Plan: make all check

Reviewers: ljin

Reviewed By: ljin

Subscribers: yhchiang, igor, haobo, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D19035
2014-06-13 15:51:44 -07:00
build_tools give correct metric name for grep in regression script 2014-06-10 16:32:09 -07:00
coverage Disable the html-based coverage report by default 2014-02-06 12:58:13 -08:00
db VersionSet::Get(): Bring back the logic of skipping key range check when there are <=3 level 0 files 2014-06-13 15:51:44 -07:00
doc doc: table_stats_collectors -> table_properties_collectors. 2014-02-07 12:19:25 -08:00
examples Make it easier to start using RocksDB 2014-05-10 10:49:33 -07:00
hdfs hdfs cleanup and compile test against CDH 4.4. 2014-05-20 17:22:12 -04:00
helpers/memenv Expose in memory Env to the world 2014-04-14 12:28:15 -07:00
include Don't compress block bigger than 2GB 2014-06-09 12:26:09 -07:00
java [Java] Improve documentation for RocksEnv and its C++ resource. 2014-06-07 17:27:03 -07:00
linters allow lambda function syntax in cpplint 2014-02-20 12:47:05 -08:00
port prefetch bloom filter data block for L0 files 2014-06-12 10:06:18 -07:00
table prefetch bloom filter data block for L0 files 2014-06-12 10:06:18 -07:00
third-party/rapidjson Add rapidjson to RocksDB 2014-05-15 16:07:05 -07:00
tools Fix sst_dump for PlainTable 2014-06-12 11:03:03 -07:00
util prefetch bloom filter data block for L0 files 2014-06-12 10:06:18 -07:00
utilities Remove upper bound for rate limiting unit test 2014-06-03 13:58:44 -07:00
.arcconfig Improve/fix bugs for the cpp linter 2014-02-13 17:48:11 -08:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Add .swp to gitignore 2014-05-16 13:17:29 -07:00
.travis.yml Turn off travis notifications 2014-05-14 16:08:02 -07:00
CONTRIBUTING.md New CLA form 2014-04-22 09:12:19 -07:00
HISTORY.md Update HISTORY.md 2014-05-21 15:25:05 -07:00
INSTALL.md Better INSTALL.md and Makefile rules 2014-05-07 16:51:30 -07:00
LICENSE Fix copyright year 2014-03-12 12:06:58 -07:00
Makefile Move master version to 3.2 2014-05-23 10:27:56 -07:00
PATENTS Fix the patent format 2013-10-16 15:37:32 -07:00
README.md Update README.md 2014-06-13 14:11:10 -07:00
ROCKSDB_LITE.md RocksDBLite 2014-04-15 13:39:26 -07:00

README.md

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

Build Status

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 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/