db536ee045
Summary: In `FileMetaData`, we keep track of the lowest-numbered blob file referenced by the SST file in question for the purposes of BlobDB's garbage collection in the `oldest_blob_file_number` field, which is updated in `UpdateBoundaries`. However, with the current code, `BlobIndex` decoding errors (or invalid blob file numbers) are swallowed in this method. The patch changes this by propagating these errors and failing the corresponding flush/compaction. (Note that since blob references are generated by the BlobDB code and also parsed by `CompactionIterator`, in reality this can only happen in the case of memory corruption.) This change necessitated updating some unit tests that involved fake/corrupt `BlobIndex` objects. Some of these just used a dummy string like `"blob_index"` as a placeholder; these were replaced with real `BlobIndex`es. Some were relying on the earlier behavior to simulate corruption; these were replaced with `SyncPoint`-based test code that corrupts a valid blob reference at read time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9851 Test Plan: `make check` Reviewed By: riversand963 Differential Revision: D35683671 Pulled By: ltamasi fbshipit-source-id: f7387af9945c48e4d5c4cd864f1ba425c7ad51f6 |
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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.