e5311a8ea4
Summary: There is a small `SingleDelete` related optimization in the `CompactionIterator` code: when a `SingleDelete`-`Put` pair is preserved solely for the purposes of transaction conflict checking, the value itself gets cleared. (This is referred to as "optimization 3" in the `CompactionIterator` code.) Though the rest of the code got updated to support `SingleDelete`'ing blob indexes, this chunk was apparently missed, resulting in an assertion failure (or `ROCKS_LOG_FATAL` in release builds) when triggered. Note: in addition to clearing the value, we also need to update the type of the KV to regular value when dealing with blob indexes here. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7904 Test Plan: `make check` Reviewed By: ajkr Differential Revision: D26118009 Pulled By: ltamasi fbshipit-source-id: 6bf78043d20265e2b15c2e1ab8865025040c42ae
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.