205e577694
Summary: During bottommost compaction, RocksDB cannot simply drop a tombstone if this tombstone is not in the earliest snapshot. The current behavior is: RocksDB skips other internal keys (of the same user key) in the same snapshot range. In the meantime, RocksDB should check for the `shutting_down` flag. Otherwise, it is possible for a bottommost compaction that has already started running to take a long time to finish, even if the application has tried to cancel all background jobs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7356 Test Plan: make check Reviewed By: ltamasi Differential Revision: D23663241 Pulled By: riversand963 fbshipit-source-id: 25f8e9b51bc3bfa3353cdf87557800f9d90ee0b5 |
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README.md
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.