90f744941d
Summary: Transaction has had methods to deal with SavePoints already, but was missing the PopSavePoint method provided by WriteBatch and WriteBatchWithIndex. This PR adds PopSavePoint to Transaction as well. Having the method on Transaction-level too is useful for applications that repeatedly execute a sequence of operations that normally succeed, but infrequently need to get rolled back. Using SavePoints here is sensible, but as operations normally succeed the application may pile up a lot of useless SavePoints inside a Transaction, leading to slightly increased memory usage for managing the unneeded SavePoints. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4256 Differential Revision: D9326932 Pulled By: yiwu-arbug fbshipit-source-id: 53a0af18a6c7e87feff8a56f1f3eab9df7f371d6
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.