fdf2a0d7eb
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9061 In write-prepared txn, checking a sequence's visibility in a released (old) snapshot may return "Snapshot released". Suppose we have two snapshots: ``` earliest_snap < earliest_write_conflict_snap ``` If we release `earliest_write_conflict_snap` but keep `earliest_snap` during bottommost level compaction, then it is possible that certain sequence of events can lead to a PUT being seq-zeroed followed by a SingleDelete of the same key. This violates the ascending order of keys, and will cause data inconsistency. Reviewed By: ltamasi Differential Revision: D31813017 fbshipit-source-id: dc68ba2541d1228489b93cf3edda5f37ed06f285 |
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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/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.