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A library that provides an embeddable, persistent key-value store for fast storage.
1,934 Commits 152 Branches 236 Tags 271 MiB
C++ 82.1%
Java 10.3%
C 2.5%
Python 1.7%
Perl 1.1%
Other 2.1%
b278ae8e50
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Lei Jin b278ae8e50 Apply fractional cascading in ForwardIterator::Seek() 
Summary:
Use search hint to reduce FindFile range thus avoid comparison
For a small DB with 50M keys, perf_context counter shows it reduces
comparison from 2B to 1.3B for a 15-minute run. No perf change was
observed for 1 seek thread, but quite good improvement was seen for 32
seek threads, when CPU was busy.
will post detail results when ready

Test Plan: db_bench and db_test

Reviewers: haobo, sdong, dhruba, igor

Reviewed By: igor

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D18879
2014-07-08 11:40:42 -07:00
build_tools Adding NUMA support to db_bench tests 2014-07-07 10:53:31 -07:00
coverage Disable the html-based coverage report by default 2014-02-06 12:58:13 -08:00
db Apply fractional cascading in ForwardIterator::Seek() 2014-07-08 11:40:42 -07:00
doc Remove seek compaction 2014-06-20 10:23:02 +02:00
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 C API: update options w/ convenience funcs & fifo compaction 2014-07-08 10:57:45 -07:00
java Update doc of options.cc 2014-07-07 12:26:06 -07:00
linters allow lambda function syntax in cpplint 2014-02-20 12:47:05 -08:00
port Add timeout_hint_us to WriteOptions and introduce Status::TimeOut. 2014-07-03 15:47:02 -07:00
table initialize decoded_internal_key_valid 2014-07-03 23:13:08 -07:00
third-party/rapidjson Fix a rapidjson compile error in mac. 2014-06-23 17:09:24 -06:00
tools In tools/db_stress.cc, set proper value in NewHashSkipListRepFactory's bucket_size 2014-07-01 11:02:42 -07:00
util Finer report I/O stats about Flush and Compaction. 2014-07-03 16:28:03 -07:00
utilities fix valgrind test 2014-06-20 15:22:11 +02:00
.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 facebook accounts are not required for CLA signers 2014-07-08 05:57:54 -04:00
HISTORY.md Update HISTORY.md to include TimeOut write API and compaction update. 2014-07-03 15:58:27 -07:00
INSTALL.md specify the command to install build_tools/mac-install-gflags.sh file in doc 2014-06-17 17:03:21 -05:00
LICENSE Fix copyright year 2014-03-12 12:06:58 -07:00
Makefile Add doc and end of line 2014-06-22 13:27:22 -07:00
PATENTS Fix the patent format 2013-10-16 15:37:32 -07:00
README.md Update README.md 2014-06-23 15:58:54 -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 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/