A library that provides an embeddable, persistent key-value store for fast storage.
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anand1976 d394a6bb48 Add a ticker stat for number of keys skipped during iteration
Summary:
This diff adds a new ticker stat, NUMBER_ITER_SKIP, to count the
number of internal keys skipped during iteration. Keys can be skipped
due to deletes, or lower sequence number, or higher sequence number
than the one requested.

Also, fix the issue when StatisticsData is naturally aligned on cacheline boundary,
padding becomes a zero size array, which the Windows compiler doesn't
like. So add a cacheline worth of padding in that case to keep it happy.
We cannot conditionally add padding as gcc doesn't allow using sizeof
in preprocessor directives.
Closes https://github.com/facebook/rocksdb/pull/3177

Differential Revision: D6353897

Pulled By: anand1976

fbshipit-source-id: 441d5a09af9c4e22e7355242dfc0c7b27aa0a6c2
2017-11-20 21:26:37 -08:00
buckifier Fix TARGETS lint warnings. 2017-11-15 14:28:34 -08:00
build_tools prefer enabling cpu features via -march/-mcpu 2017-11-10 16:57:11 -08:00
cache Fix coverity uninitialized fields warnings in lru_cache 2017-10-27 11:26:43 -07:00
cmake CMake: Add support for CMake packages 2017-08-28 17:14:37 -07:00
coverage Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
db Add a ticker stat for number of keys skipped during iteration 2017-11-20 21:26:37 -08:00
docs Blog post for 5.8 release 2017-09-28 10:14:09 -07:00
env Suppress valgrind "unimplemented functionality" error 2017-11-15 14:28:34 -08:00
examples Pinnableslice examples and blog post 2017-08-24 12:26:07 -07:00
hdfs Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
include/rocksdb Add a ticker stat for number of keys skipped during iteration 2017-11-20 21:26:37 -08:00
java Add a ticker stat for number of keys skipped during iteration 2017-11-20 21:26:37 -08:00
memtable Enable MSVC W4 with a few exceptions. Fix warnings and bugs 2017-10-19 10:57:12 -07:00
monitoring Add a ticker stat for number of keys skipped during iteration 2017-11-20 21:26:37 -08:00
options Move static variables out of the header file 2017-11-17 17:12:27 -08:00
port Make writable_file_max_buffer_size dynamic 2017-10-31 13:56:35 -07:00
table Revert "No need for Restart Interval for meta blocks" 2017-11-20 16:42:03 -08:00
third-party Enable MSVC W4 with a few exceptions. Fix warnings and bugs 2017-10-19 10:57:12 -07:00
tools Regression test build binaries with PORTABLE=1 2017-11-13 21:26:24 -08:00
util Make trash-to-DB size ratio limit configurable 2017-11-17 11:58:17 -08:00
utilities Blob DB: Remove some redundant log lines 2017-11-20 21:11:34 -08:00
.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 fix lite build 2017-10-17 08:57:09 -07:00
appveyor.yml Add -DPORTABLE=1 to MSVC CI build 2017-08-31 16:42:48 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Blob DB: not using PinnableSlice move assignment 2017-11-13 18:12:20 -08:00
CONTRIBUTING.md Remove the licensing description in CONTRIBUTING.md 2017-07-16 15:57:18 -07:00
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 Make trash-to-DB size ratio limit configurable 2017-11-17 11:58:17 -08:00
INSTALL.md Default one to rocksdb:x64-windows 2017-09-28 16:12:24 -07:00
issue_template.md Add a template for issues 2017-09-29 11:41:28 -07:00
LANGUAGE-BINDINGS.md add Erlang to the list of language bindings 2017-08-28 16:43:16 -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 Suppress valgrind "unimplemented functionality" error 2017-11-15 14:28:34 -08:00
README.md Appveyor badge to show master branch 2016-07-26 13:54:08 -07:00
ROCKSDB_LITE.md Optimistic Transactions 2015-05-29 14:36:35 -07:00
src.mk Fix TARGETS lint warnings. 2017-11-15 14:28:34 -08:00
TARGETS Fix TARGETS lint warnings. 2017-11-15 14:28:34 -08:00
thirdparty.inc Enable cacheline_aligned_alloc() to allocate from jemalloc if enabled. 2017-10-27 13:27:12 -07:00
USERS.md Added ProfaneDB 2017-11-19 10:11:44 -08:00
Vagrantfile Update Vagrant file (test internal phabricator workflow) 2016-10-28 15:39:19 -07:00
WINDOWS_PORT.md Commit both PR and internal code review changes 2015-07-07 16:58:20 -07:00

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/