0d2172f128
Summary: Periodic compactions ensure that even SSTs that do not get picked up otherwise eventually go through compaction; used in conjunction with BlobDB's garbage collection, they enable BlobDB to reclaim space when old blob files are used by such straggling SSTs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6172 Test Plan: Ran `make check` and used the BlobDB mode of `db_bench`. Differential Revision: D19045045 Pulled By: ltamasi fbshipit-source-id: 04636ecc4b6cfe8d495bf656faa65d54a5eb1a93
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/
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.