A library that provides an embeddable, persistent key-value store for fast storage.
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Mayank Agarwal da2fd001a6 Fix rocksdb->levledb BytewiseComparator and inverted order of error in db/version_set.cc
Summary:
This is needed to make existing dbs be able to open and also because BytewiseComparator was not changed since leveldb.
The inverted order in the error message caused confusion prebiously

Test Plan: make; open existing db

Reviewers: leveldb, dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D13449
2013-10-14 18:16:54 -07:00
build_tools Migrate names of properties from 'leveldb' prefix to 'rocksdb' prefix. 2013-10-06 00:14:26 -07:00
coverage Fix the gcov/lcov related issues 2013-08-22 17:01:06 -07:00
db Fix rocksdb->levledb BytewiseComparator and inverted order of error in db/version_set.cc 2013-10-14 18:16:54 -07:00
doc Add draft logo. 2013-10-09 22:55:30 -07:00
hdfs Fixing build failure 2013-10-10 01:01:16 -07:00
helpers/memenv Change Function names from Compaction->Flush When they really mean Flush 2013-10-14 15:12:15 -07:00
include Features in Transaction log iterator 2013-10-14 18:16:21 -07:00
linters/src fixing linters. 2012-12-14 14:05:27 -08:00
port Change namespace from leveldb to rocksdb 2013-10-04 11:59:26 -07:00
snappy Build with gcc-4.7.1-glibc-2.14.1. 2012-09-17 10:56:26 -07:00
table Add statistics to sst file 2013-10-14 15:56:13 -07:00
tools Change Function names from Compaction->Flush When they really mean Flush 2013-10-14 15:12:15 -07:00
util Fix rocksdb->levledb BytewiseComparator and inverted order of error in db/version_set.cc 2013-10-14 18:16:54 -07:00
utilities Migrate names of properties from 'leveldb' prefix to 'rocksdb' prefix. 2013-10-06 00:14:26 -07:00
.arcconfig Enable linting in arc. 2013-02-01 11:34:25 -08:00
.gitignore Introduced a new flag non_blocking_io in ReadOptions. 2013-08-28 10:49:14 -07:00
LICENSE reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
Makefile Removed scribe, thrift and java modules. 2013-10-04 15:36:00 -07:00
README Update README file for public interface 2013-09-13 11:15:47 -07:00
README.fb Updating README.fb to have newest verison 2.4 2013-10-04 12:17:44 -07:00

rocksdb: A persistent key-value store for flash storage
Authors: * The Facebook Database Engineering Team
         * Build 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 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/*.  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/rocksdb/db.h
    Main interface to the DB: Start here

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

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

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

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

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

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

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

include/rocksdb/cache.h
    An API for the block cache.

include/rocksdb/compaction_filter.h
    An API for a application filter invoked on every compaction.

include/rocksdb/filter_policy.h
    An API for configuring a bloom filter.

include/rocksdb/memtablerep.h
    An API for implementing a memtable.

include/rocksdb/statistics.h
    An API to retrieve various database statistics.

include/rocksdb/transaction_log.h
    An API to retrieve transaction logs from a database.