847ca9f964
Summary: New comment for share_files_with_checksum: // Only used if share_table_files is set to true. Setting to false is // DEPRECATED and potentially dangerous because in that case BackupEngine // can lose data if backing up databases with distinct or divergent // history, for example if restoring from a backup other than the latest, // writing to the DB, and creating another backup. Setting to true (default) // prevents these issues by ensuring that different table files (SSTs) with // the same number are treated as distinct. See // share_files_with_checksum_naming and ShareFilesNaming. I have also removed interim option kFlagMatchInterimNaming, which is no longer needed and was never needed for correct+compatible operation (just performance). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8020 Test Plan: tests updated. Backward+forward compatibility verified with SHORT_TEST=1 check_format_compatible.sh. ldb uses default backup options, and I manually verified shared_checksum in /tmp/rocksdb_format_compatible_peterd/bak/current/ after run. Reviewed By: ajkr Differential Revision: D26786331 Pulled By: pdillinger fbshipit-source-id: 36f968dfef1f5cacbd65154abe1d846151a55130 |
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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.