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Yi Wu c2247dc1c7 Make DBImpl::has_unpersisted_data_ atomic
Summary:
Seems to me `has_unpersisted_data_` is read from read thread and write
from write thread concurrently without synchronization. Making it an
atomic.

I update the logic not because seeing any problem with it, but it just
feel confusing.
Closes https://github.com/facebook/rocksdb/pull/1869

Differential Revision: D4555837

Pulled By: yiwu-arbug

fbshipit-source-id: eff2ab8
2017-02-13 18:54:13 -08:00
arcanist_util Fix arc setting for Facebook internal tools 2017-02-02 13:24:16 -08:00
build_tools Remove disableDataSync option 2017-02-13 11:09:13 -08:00
cmake/modules cmake support for linux and osx (#1358) 2016-09-28 11:53:15 -07:00
coverage
db Make DBImpl::has_unpersisted_data_ atomic 2017-02-13 18:54:13 -08:00
docs Blog post for 5.1.2 release 2017-02-08 08:54:20 -08:00
examples Remove disableDataSync option 2017-02-13 11:09:13 -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 disableDataSync option 2017-02-13 11:09:13 -08:00
java Remove disableDataSync option 2017-02-13 11:09:13 -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 disableDataSync option 2017-02-13 11:09:13 -08:00
third-party Kill flashcache code in RocksDB 2016-12-01 10:09:22 -08:00
tools Remove disableDataSync option 2017-02-13 11:09:13 -08:00
util Remove disableDataSync option 2017-02-13 11:09:13 -08:00
utilities Remove disableDataSync option 2017-02-13 11:09:13 -08:00
.arcconfig Make rocksdb work with internal repo 2016-10-28 14:59:50 -07:00
.clang-format
.gitignore Less linear search in DBIter::Seek() when keys are overwritten a lot 2016-11-28 10:24:11 -08:00
.travis.yml Split travis jobs 2017-01-19 13:39:12 -08:00
AUTHORS
CMakeLists.txt Windows thread 2017-02-06 14:54:18 -08:00
CONTRIBUTING.md
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
HISTORY.md Remove disableDataSync option 2017-02-13 11:09:13 -08:00
INSTALL.md Update static library versions and add checksums 2017-02-12 23:09:09 -08:00
LANGUAGE-BINDINGS.md Update LANGUAGE-BINDINGS.md 2016-07-15 13:09:30 +02:00
LICENSE
Makefile Update static library versions and add checksums 2017-02-12 23:09:09 -08:00
PATENTS
README.md Appveyor badge to show master branch 2016-07-26 13:54:08 -07:00
ROCKSDB_LITE.md
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
appveyor.yml Enable DBTest.GroupCommit as it runs in a reasonlable time now. 2017-01-18 14:24:11 -08:00
src.mk Rename merger.h -> merging_iterator.h 2017-02-02 16:54:19 -08:00
thirdparty.inc Introduce XPRESS compresssion on Windows. (#1081) 2016-04-19 22:54:24 -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/