7d04ef4655
Summary: Part of the test required that a compaction start before a manual flush, but this was not enforced by the test. In some cases, particularly when writing to tmpfs, this could lead to the compaction starting after the flush, which caused the base level to be higher than it was expected to be. Add a sync point in the test to ensure that the flush and compaction happen simultaneously. The test also had some stale comments, so those have been removed or modified, and the test has been simplified so that it no longer uses sleeps and writes uncompressed SSTs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4668 Differential Revision: D13032440 Pulled By: abhimadan fbshipit-source-id: 3f23b583a096454dafb8d8ea75678605dec80209
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 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.