A library that provides an embeddable, persistent key-value store for fast storage.
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anand1976 1e3845805d Properly determine a truncated CompactRange stop key (#4496)
Summary:
When a CompactRange() call for a level is truncated before the end key
is reached, because it exceeds max_compaction_bytes, we need to properly
set the compaction_end parameter to indicate the stop key. The next
CompactRange will use that as the begin key. We set it to the smallest
key of the next file in the level after expanding inputs to get a clean
cut.

Previously, we were setting it before expanding inputs. So we could end
up recompacting some files. In a pathological case, where a single key
has many entries spanning all the files in the level (possibly due to
merge operands without a partial merge operator, thus resulting in
compaction output identical to the input), this would result in
an endless loop over the same set of files.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4496

Differential Revision: D10395026

Pulled By: anand1976

fbshipit-source-id: f0c2f89fee29b4b3be53b6467b53abba8e9146a9
2018-10-15 23:22:51 -07:00
buckifier Set -DROCKSDB_JEMALLOC for buck build if jemalloc presents (#4489) 2018-10-15 11:41:47 -07:00
build_tools Fix typos in comments (#4456) 2018-10-04 20:46:50 -07:00
cache Introduce CacheAllocator, a custom allocator for cache blocks (#4437) 2018-10-02 17:24:58 -07:00
cmake Search paths provided by intel's "tbbvars.sh". 2018-05-07 14:28:36 -07:00
coverage Remove unused imports, from python scripts. (#4057) 2018-06-26 12:43:04 -07:00
db Properly determine a truncated CompactRange stop key (#4496) 2018-10-15 23:22:51 -07:00
docs Update WritePrepared blog post with latest results (#4494) 2018-10-15 14:01:31 -07:00
env move dump stats to a separate thread (#4382) 2018-10-08 22:54:43 -07:00
examples Pin top-level index on partitioned index/filter blocks (#4037) 2018-06-22 15:27:46 -07:00
hdfs Comment out unused variables 2018-03-05 13:13:41 -08:00
include/rocksdb Replace 'string' with 'const string&' in FileOperationInfo (#4491) 2018-10-15 13:46:01 -07:00
java Add UInt64AddOperator to rocksjava (#4448) 2018-10-12 17:35:47 -07:00
memtable Suppress clang analyzer error (#4299) 2018-08-21 16:43:05 -07:00
monitoring Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
options Add path to WritableFileWriter. (#4039) 2018-08-23 10:12:58 -07:00
port Add compile time option to work with utf8 filename strings (#4469) 2018-10-11 23:24:28 -07:00
table Add listener to sample file io (#3933) 2018-10-12 18:36:11 -07:00
third-party Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
tools benchmark.sh: to fix divide by zero runtime error (#4442) 2018-10-10 21:03:19 -07:00
util Replace 'string' with 'const string&' in FileOperationInfo (#4491) 2018-10-15 13:46:01 -07:00
utilities avoid copying when iterating using range-based for (#4459) 2018-10-09 17:15:51 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore RocksDB Trace Analyzer (#4091) 2018-08-13 11:44:02 -07:00
.lgtm.yml Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
.travis.yml Add GCC 8 to Travis (#3433) 2018-07-13 10:58:06 -07:00
appveyor.yml Upgrade Appveyor to VS2017 2018-02-01 13:57:01 -08:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Add compile time option to work with utf8 filename strings (#4469) 2018-10-11 23:24:28 -07:00
CODE_OF_CONDUCT.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
CONTRIBUTING.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
COPYING Add GPLv2 as an alternative license. 2017-04-27 18:06:12 -07:00
DEFAULT_OPTIONS_HISTORY.md options.delayed_write_rate use the rate of rate_limiter by default. 2017-05-24 09:58:24 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Properly determine a truncated CompactRange stop key (#4496) 2018-10-15 23:22:51 -07:00
INSTALL.md Enable compilation on OpenBSD 2018-03-19 12:30:05 -07:00
issue_template.md Add a template for issues 2017-09-29 11:41:28 -07:00
LANGUAGE-BINDINGS.md Added PingCaps Rust RocksDB and ObjectiveRocks (#4065) 2018-06-27 15:43:21 -07:00
LICENSE.Apache Change RocksDB License 2017-07-15 16:11:23 -07:00
LICENSE.leveldb Add back the LevelDB license file 2017-07-16 18:42:18 -07:00
Makefile Utility to run task periodically in a thread (#4423) 2018-09-27 15:28:00 -07:00
README.md Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
src.mk RocksJava: memory_util support (#4446) 2018-10-08 11:05:27 -07:00
TARGETS Set -DROCKSDB_JEMALLOC for buck build if jemalloc presents (#4489) 2018-10-15 11:41:47 -07:00
thirdparty.inc Provide a way to override windows memory allocator with jemalloc for ZSTD 2018-06-04 12:12:48 -07:00
USERS.md Adding IOTA Foundation to USERS.MD (#4436) 2018-10-02 10:03:46 -07:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md Add GCC 8 to Travis (#3433) 2018-07-13 10:58:06 -07:00

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

Linux/Mac Build Status Windows Build status PPC64le 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/

License

RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.