241b5aa15a
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9562 With per-transaction `read_timestamp_`, it is possible to perform transaction validation after locking a key in addition to sequence-based validation. Specifically, if a transaction has a read_timestamp, then we perform timestamp-based validation as well after the key is locked via `GetForUpdate()`. This is to make sure that no other transaction has modified the key and committed successfully since the read timestamp (but before the locking operation) which represents a consistent view of the database. Reviewed By: ltamasi Differential Revision: D31822034 fbshipit-source-id: c6f1828b7fc23e4f85e2d1ed73ff51464a058d91 |
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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/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.
Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.
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.