Sergei Petrunia 1b076e82db Expose locktree's wait count in RangeLockManagerHandle::Counters (#9289)
Summary:
locktree is a module providing Range Locking. It has a counter for
the number of times a lock acquisition request was blocked by an
existing conflicting lock and had to wait for it to be released.

Expose this counter in RangeLockManagerHandle::Counters::lock_wait_count.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9289

Reviewed By: jay-zhuang

Differential Revision: D33079182

Pulled By: riversand963

fbshipit-source-id: 25b1a362d9da247536ab5007bd15900b319f139e
2021-12-22 21:14:48 -08:00
2021-11-20 10:21:58 -08:00
2021-10-07 11:22:17 -07:00
2020-06-29 14:31:41 -07:00
2017-10-18 14:42:10 -07:00
2019-08-29 23:21:01 -07:00
2017-12-05 18:42:35 -08:00
2017-04-27 18:06:12 -07:00
2021-12-17 16:20:39 -08:00
2017-07-15 16:11:23 -07:00
2021-04-22 11:12:40 -07:00
2019-06-24 17:40:32 -07:00
2021-10-01 16:10:35 -07:00

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

CircleCI Status TravisCI Status Appveyor 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 especially suitable for storing multiple terabytes of data in a single database.

Start with example usage here: https://github.com/facebook/rocksdb/tree/main/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/ and https://rocksdb.slack.com/

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.

Description
A library that provides an embeddable, persistent key-value store for fast storage.
Readme 271 MiB
Languages
C++ 82.1%
Java 10.3%
C 2.5%
Python 1.7%
Perl 1.1%
Other 2.1%