A library that provides an embeddable, persistent key-value store for fast storage.
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Haobo Xu 1afdf28701 [RocksDB] Compaction Filter Cleanup
Summary: This hopefully gives the right semantics to compaction filter. Will write a small wiki to explain the ideas.

Test Plan: make check; db_stress

Reviewers: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D11121
2013-06-14 14:23:08 -07:00
db [RocksDB] Compaction Filter Cleanup 2013-06-14 14:23:08 -07:00
doc merge 1.5 2012-08-28 11:43:33 -07:00
hdfs Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
helpers/memenv [RocksDB] cleanup EnvOptions 2013-06-12 11:17:19 -07:00
include [Rocksdb] measure table open io in a histogram 2013-06-13 17:25:09 -07:00
java Pom changes to make relase 1.5.7 for java. 2013-01-10 10:43:43 -08:00
linters/src fixing linters. 2012-12-14 14:05:27 -08:00
port [RocksDB] Introduce Fast Mutex option 2013-06-01 23:11:34 -07:00
scribe fix db_test error with scribe logger turned on 2012-08-28 11:22:58 -07:00
snappy Build with gcc-4.7.1-glibc-2.14.1. 2012-09-17 10:56:26 -07:00
table [Rocksdb] measure table open io in a histogram 2013-06-13 17:25:09 -07:00
thrift Implement RowLocks for assoc schema 2012-10-03 23:19:01 -07:00
tools [RocksDB] Fix build. Removed deprecated option --mmap_read from db_crashtest 2013-06-13 13:48:35 -07:00
util [RocksDB] Sync file to disk incrementally 2013-06-12 12:53:59 -07:00
utilities Completed the implementation and test cases for Redis API. 2013-06-11 11:19:49 -07:00
VALGRIND_LOGS Use version 3.8.1 for valgrind in third_party and do away with log files 2013-03-06 17:47:31 -08:00
.arcconfig Enable linting in arc. 2013-02-01 11:34:25 -08:00
.gitignore Various build cleanups/improvements 2013-01-14 18:40:22 -08:00
build_detect_platform Modify build_detect_platform to run fbcode.*.* irrespective of $PATH 2013-05-14 22:09:01 -07:00
build_detect_version Make the build-time show up in the leveldb library. 2013-03-11 10:33:15 -07:00
build_java.sh Release 1.5.6 for Java code + Script to automate it. 2012-12-17 12:11:11 -08:00
e Enhance db_bench 2013-03-14 16:00:23 -07:00
fbcode.clang31.sh Cleanup TODO/NEWS/AUTHORS files 2013-01-25 09:11:26 -08:00
fbcode.gcc471.sh Updating fbcode.gcc471.sh to use jemalloc 3.3.1 2013-03-13 15:34:50 -07:00
LICENSE reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
Makefile Completed the implementation and test cases for Redis API. 2013-06-11 11:19:49 -07:00
README Use posix_fallocate as default. 2013-03-13 13:50:26 -07:00
README.fb Release 1.5.9.fb to third party 2013-04-10 17:23:58 -07:00
regression_build_test.sh Minor improvements to the regression testing 2013-01-16 14:47:20 -08:00
valgrind_test.sh make clean in valgrind_test.sh first 2013-04-23 14:25:19 -07:00

rocksdb: A persistent key-value store for flash storage
Authors: The Facebook Database Engineering Team

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-Stuctured-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.

The core of this code has been derived from open-source leveldb.

The code under this directory implements a system for maintaining a
persistent key/value store.

See doc/index.html for more explanation.
See doc/impl.html for a brief overview of the implementation.

The public interface is in include/*.h.  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.

Guide to header files:

include/db.h
    Main interface to the DB: Start here

include/options.h
    Control over the behavior of an entire database, and also
    control over the behavior of individual reads and writes.

include/comparator.h
    Abstraction for user-specified comparison function.  If you want
    just bytewise comparison of keys, you can use the default comparator,
    but clients can write their own comparator implementations if they
    want custom ordering (e.g. to handle different character
    encodings, etc.)

include/iterator.h
    Interface for iterating over data. You can get an iterator
    from a DB object.

include/write_batch.h
    Interface for atomically applying multiple updates to a database.

include/slice.h
    A simple module for maintaining a pointer and a length into some
    other byte array.

include/status.h
    Status is returned from many of the public interfaces and is used
    to report success and various kinds of errors.

include/env.h
    Abstraction of the OS environment.  A posix implementation of
    this interface is in util/env_posix.cc

include/table.h
include/table_builder.h
    Lower-level modules that most clients probably won't use directly