58660bf21a
Summary: `histogram_test` uses real sleep, which depends on the test executing speed, it makes the test unstable. Switching to using a mock time env, it can also increase the test speed (from 10100ms -> 100ms). Pull Request resolved: https://github.com/facebook/rocksdb/pull/7799 Test Plan: run test 10 times, all passed. vs. without fix 3 out 10 test failed: no fix: https://app.circleci.com/pipelines/github/facebook/rocksdb?branch=pull%2F7797 with fix: https://app.circleci.com/pipelines/github/facebook/rocksdb?branch=pull%2F7799 Reviewed By: pdillinger Differential Revision: D25676948 Pulled By: jay-zhuang fbshipit-source-id: 64c273fc299c53283138dbb213386e4b45e8bdc2
RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
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/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/ 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.