dolysis
/
rocksdb
mirror of https://github.com/facebook/rocksdb.git
3
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
7,133 Commits 196 Branches 277 Tags 388 MiB
C++ 84.3%
Java 9.6%
C 1.6%
Python 1.5%
Perl 0.9%
Other 2%
Go to file
Andrew Kryczka 01bcc34896 Introduce library-independent default compression level 
Summary:
Previously we were using -1 as the default for every library, which was legacy from our zlib options. That worked for a while, but after zstd introduced a146ee04ae, it started giving poor compression ratios by default in zstd.

This PR adds a constant to RocksDB public API, `CompressionOptions::kDefaultCompressionLevel`, which will get translated to the default value specific to the compression library being used in "util/compression.h". The constant uses a number that appears to be larger than any library's maximum compression level.
Closes https://github.com/facebook/rocksdb/pull/3895

Differential Revision: D8125780

Pulled By: ajkr

fbshipit-source-id: 2db157a89118cd4f94577c2f4a0a5ff31c8391c6
 		2018-05-23 18:42:08 -07:00
buckifier Update buckifier and TARGETS 2018-03-30 14:26:53 -07:00
build_tools Pass -latomic to linker when using clang 2018-04-25 12:13:41 -07:00
cache comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
cmake Search paths provided by intel's "tbbvars.sh". 2018-05-07 14:28:36 -07:00
coverage Suppress lint in old files 2018-01-29 12:56:42 -08:00
db Specify the underlying type of enums. 2018-05-23 16:12:59 -07:00
docs Adding blog post for 5.10.2 release 2018-02-13 11:56:59 -08:00
env Apply use_direct_io_for_flush_and_compaction to writes only 2018-05-09 19:42:58 -07:00
examples Pinnableslice examples and blog post 2017-08-24 12:26:07 -07:00
hdfs Comment out unused variables 2018-03-05 13:13:41 -08:00
include/rocksdb Introduce library-independent default compression level 2018-05-23 18:42:08 -07:00
java Add a stat for MultiGet keys found, update memtable hit/miss stats 2018-04-20 15:28:19 -07:00
memtable Reorder field based on esan data 2018-05-17 17:57:48 -07:00
monitoring Print histogram count and sum in statistics string 2018-05-21 11:12:47 -07:00
options PersistRocksDBOptions() to use WritableFileWriter 2018-05-21 16:42:22 -07:00
port Better destroydb 2018-05-03 16:13:09 -07:00
table Fix a backward compatibility problem with table_properties being nullptr 2018-05-22 13:57:17 -07:00
third-party fix some text in comments. 2018-04-10 15:59:24 -07:00
tools Avoid single-deleting merge operands in db_stress 2018-05-22 10:58:36 -07:00
util Introduce library-independent default compression level 2018-05-23 18:42:08 -07:00
utilities Move prefix_extractor to MutableCFOptions 2018-05-21 14:43:11 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore Remove leftover references to phutil_module_cache 2017-08-23 12:12:21 -07:00
.travis.yml add 4th test_group in travis 2018-03-13 18:57:29 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs 2018-05-17 02:56:56 -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 Introduce library-independent default compression level 2018-05-23 18:42:08 -07:00
INSTALL.md Enable compilation on OpenBSD 2018-03-19 12:30:05 -07:00
LANGUAGE-BINDINGS.md Add Nim to the list of language bindings 2018-01-29 09:57:46 -08:00
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 Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs 2018-05-17 02:56:56 -07:00
README.md Add dual-license info to README.md 2018-03-06 12:43:51 -08:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
TARGETS Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs 2018-05-17 02:56:56 -07:00
USERS.md Added ProfaneDB 2017-11-19 10:11:44 -08:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00
appveyor.yml Upgrade Appveyor to VS2017 2018-02-01 13:57:01 -08:00
issue_template.md Add a template for issues 2017-09-29 11:41:28 -07:00
src.mk Add missing test files to src.mk 2018-05-21 09:43:29 -07:00
thirdparty.inc Make Windows dep switches compatible with other builds 2018-01-05 14:56:54 -08:00

README.md

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.