RocksDB is an embedded database for high-performance key-value data, a fork of Google LevelDB, optimized to utilize many CPU cores and efficiently utilize fast storage. It is written in C++ and provides official language bindings for C++, C, and Java, as well as many third-party language bindings.

behavior change

• ReadOptions::verify_checksums=false Disabled CacheEntryRole::kDataBlock Checksum validation for more reads of the block.
• In case of scanning with async_io enabled, if posix does not support IOUring, a Status::NotSupported error will be returned to the user.

feature removal

• delete RocksDB Lite.
• delete block_cache_compressed feature, and the stats associated with it were also removed
• remove deprecated Env::LoadEnv(),use Env::CreateFromString() replace.
• remove deprecated FileSystem::Load().use FileSystem::CreateFromString() replace.
• Deprecated versions of these utility functions and corresponding Java bindings have been removed: LoadOptionsFromFile, LoadLatestOptions, CheckOptionsCompatibility.
• Remove FactoryFunc of LoadObject method from customizable helper method

build changes

• Now make build will build a shared library instead of a static library by default, use LIB_MODE=static to rewrite

new function

• pass FilterV3 The API now supports compression filters for wide-column entities
• for CompressedSecondaryCacheOptions Added do_not_compress_roles, to disable compression for certain types of blocks. Filter blocks are now not compressed by CompressedSecondaryCache by default.
• added a new MultiGetEntity API, which can perform batch wide-column point query

repair

• fixed ColumnFamilyData::flush_reason data races caused by concurrent refreshes.
• Fixed issues with Get and MultiGet when user-defined timestamps are enabled in conjunction with BlobDB.
• fixed LockWAL() some atypical behavior of
• Fixed a feature interaction bug where for Blobs, GetEntity Blobs references are displayed instead of Blobs values.
• when ReadOptions::async_io When the flag is true and IOuring is not enabled, return the correct error to the MultiGet caller ( Status::NotSupported() ).Previously, when the actual failure was lack of async IO support, it would return Status::Corruption().
• Fixed bug with DB open/restore from compressed WAL
• …

For more details, please check: https://github.com/facebook/rocksdb/releases/tag/v8.0.0