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Andrew Kryczka fbff4628a9 Reduce compaction iterator status checks 
Summary:
seems it's expensive to check status since the underlying merge iterator checks status of all its children. so only do it when it's really necessary to get the status before invoking Next(), i.e., when we're advancing to get the first key in the next file.
Closes https://github.com/facebook/rocksdb/pull/1691

Differential Revision: D4343446

Pulled By: siying

fbshipit-source-id: 70ab315
2016-12-16 17:39:09 -08:00
arcanist_util Rocksdb contruns to new Sandcastle API 2016-11-10 10:54:20 -08:00
build_tools "make format" format diff since last commit from master 2016-12-16 11:24:18 -08:00
cmake/modules cmake support for linux and osx (#1358) 2016-09-28 11:53:15 -07:00
coverage
db Reduce compaction iterator status checks 2016-12-16 17:39:09 -08:00
docs Add pcache documentation images 2016-12-14 11:54:22 -08:00
examples Add missing copyright header 2016-12-14 10:24:13 -08:00
hdfs Fix bug in UnScSigned-off-by: xh931076284 <931076284@qq.com> (#1336) 2016-09-14 10:17:34 -07:00
include/rocksdb gcc-7 requires include <functional> for std::function 2016-12-16 11:24:18 -08:00
java gcc-7 requires include <functional> for std::function 2016-12-16 11:24:18 -08:00
memtable Unified InlineSkipList::Insert algorithm with hinting 2016-11-22 14:09:13 -08:00
port Return finer-granularity status from Env::GetChildren* 2016-12-12 12:54:13 -08:00
table table/block_based_table_builder.cc: intentional fallthrough - comment to match gcc pattern 2016-12-13 13:54:15 -08:00
third-party Kill flashcache code in RocksDB 2016-12-01 10:09:22 -08:00
tools gcc-7 requires include <functional> for std::function 2016-12-16 11:24:18 -08:00
util WritableFileWriter: default buffer size equal min(64k,options.writabl? 2016-12-16 13:09:14 -08:00
utilities gcc-7 requires include <functional> for std::function 2016-12-16 11:24:18 -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 Ask travis to use JDK 7 2016-11-16 10:54:12 -08:00
appveyor.yml fix vs generator (#1269) 2016-08-10 09:08:13 -07:00
AUTHORS
CMakeLists.txt Iterator should be in corrupted status if merge operator return false 2016-12-16 11:09:16 -08:00
CONTRIBUTING.md
DEFAULT_OPTIONS_HISTORY.md Release RocksDB 4.8.0 2016-05-02 14:38:04 -07:00
DUMP_FORMAT.md
HISTORY.md More accurate error status for BackupEngine::Open 2016-12-12 13:24:21 -08:00
INSTALL.md Update documentation to point at gcc 4.8 2016-10-29 12:09:17 -07:00
LANGUAGE-BINDINGS.md Update LANGUAGE-BINDINGS.md 2016-07-15 13:09:30 +02:00
LICENSE
Makefile Iterator should be in corrupted status if merge operator return false 2016-12-16 11:09:16 -08:00
PATENTS
README.md Appveyor badge to show master branch 2016-07-26 13:54:08 -07:00
ROCKSDB_LITE.md
src.mk Iterator should be in corrupted status if merge operator return false 2016-12-16 11:09:16 -08:00
thirdparty.inc Introduce XPRESS compresssion on Windows. (#1081) 2016-04-19 22:54:24 -07:00
USERS.md Update USERS.md 2016-12-07 11:24:14 -08:00
Vagrantfile Update Vagrant file (test internal phabricator workflow) 2016-10-28 15:39:19 -07:00
WINDOWS_PORT.md

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/