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Aaron Gao 6fb9013441 sanitize readahead when direct read enabled 
Summary:
no readahead:
readseq      :       8.438 micros/op 118510 ops/sec;   13.1 MB/s
sanitize to 10MB:
readseq      :       6.051 micros/op 165248 ops/sec;   18.3 MB/s
Closes https://github.com/facebook/rocksdb/pull/1945

Differential Revision: D4645811

Pulled By: lightmark

fbshipit-source-id: 5d63770
2017-03-02 17:24:11 -08:00
arcanist_util Fix arc setting for Facebook internal tools 2017-02-02 13:24:16 -08:00
build_tools Fix Java build 2017-02-23 18:39:13 -08:00
cmake/modules cmake support for linux and osx (#1358) 2016-09-28 11:53:15 -07:00
coverage Fix coverage script 2014-11-03 14:53:00 -08:00
db sanitize readahead when direct read enabled 2017-03-02 17:24:11 -08:00
docs Blog post for 5.1.2 release 2017-02-08 08:54:20 -08:00
examples Remove skip_table_builder_flush and default it to true 2017-03-02 16:54:10 -08:00
hdfs Fix bug in UnScSigned-off-by: xh931076284 <931076284@qq.com> (#1336) 2016-09-14 10:17:34 -07:00
include/rocksdb Remove skip_table_builder_flush and default it to true 2017-03-02 16:54:10 -08:00
java Fixed various memory leaks and Java 8 JNI Compatibility 2017-02-27 16:39:12 -08:00
memtable Unified InlineSkipList::Insert algorithm with hinting 2016-11-22 14:09:13 -08:00
port Windows thread 2017-02-06 14:54:18 -08:00
table Remove skip_table_builder_flush and default it to true 2017-03-02 16:54:10 -08:00
third-party Kill flashcache code in RocksDB 2016-12-01 10:09:22 -08:00
tools Remove skip_table_builder_flush and default it to true 2017-03-02 16:54:10 -08:00
util Remove skip_table_builder_flush and default it to true 2017-03-02 16:54:10 -08:00
utilities Fix unaligned reads in read cache 2017-02-27 13:09:12 -08:00
.arcconfig Make rocksdb work with internal repo 2016-10-28 14:59:50 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Less linear search in DBIter::Seek() when keys are overwritten a lot 2016-11-28 10:24:11 -08:00
.travis.yml Run fewer tests in OSX 2017-02-27 11:09:20 -08:00
appveyor.yml Separate small subset tests in DBTest 2017-02-27 12:24:11 -08:00
AUTHORS Add AUTHORS file. Fix #203 2014-09-29 10:52:18 -07:00
CMakeLists.txt Divide external_sst_file_test 2017-02-28 14:24:11 -08:00
CONTRIBUTING.md facebook accounts are not required for CLA signers 2014-07-08 05:57:54 -04:00
DEFAULT_OPTIONS_HISTORY.md Change the default of delayed slowdown value to 16MB/s 2017-02-01 20:39:17 -08:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md add direct I/O to version notes 5.2.0 2017-02-23 22:09:12 -08:00
INSTALL.md Update static library versions and add checksums 2017-02-12 23:09:09 -08:00
LANGUAGE-BINDINGS.md Adding Dlang to the list 2017-02-16 17:24:10 -08:00
LICENSE Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
Makefile Divide external_sst_file_test 2017-02-28 14:24:11 -08:00
PATENTS Update Patent Grant. 2015-04-13 10:33:43 +01:00
README.md Appveyor badge to show master branch 2016-07-26 13:54:08 -07:00
ROCKSDB_LITE.md Optimistic Transactions 2015-05-29 14:36:35 -07:00
src.mk Divide external_sst_file_test 2017-02-28 14:24:11 -08:00
thirdparty.inc Introduce XPRESS compresssion on Windows. (#1081) 2016-04-19 22:54:24 -07:00
USERS.md Update USERS.md add user Pika 2017-01-25 10:39:17 -08:00
Vagrantfile Update Vagrant file (test internal phabricator workflow) 2016-10-28 15:39:19 -07:00
WINDOWS_PORT.md Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00

README.md

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

Build Status Build status

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/