This is the third Milestone of Redis Community Edition 8.0.

Milestones are non-feature-complete pre-releases. Pre-releases are not suitable for production use. Once we reach feature-completeness we will release RC1.

Headlines:

8.0-M03 introduces an improved replication mechanism which is more performant and robust, a new I/O threading implementation which enables throughput increase on multi-core environments, and many additional performance improvements. Both Alpine and Debian Docker images are now available on Docker Hub. Snap and Homebrew distributions are available as well (see https://github.com/redis/homebrew-redis)

Security fixes

• (CVE-2024-46981) Lua script may lead to remote code execution
• (CVE-2024-51741) Denial-of-service due to malformed ACL selectors

New Features

• #13695 New I/O threading implementation
• #13732 New replication mechanism

Bug fixes

• #13653 MODULE LOADEX - crash on nonexistent parameter name
• #13661 FUNCTION FLUSH - memory leak when using jemalloc
• #13626 Memory leak on failed RDB loading

Other general improvements

• #13639 When hide-user-data-from-log is enabled - also print command tokens on crash
• #13660 Add the Lua VM memory to memory overhead

New metrics

• #13592 INFO - new KEYSIZES section includes key size distributions for basic data types
• #13695 INFO - new Threads section includes I/O threading metrics

Modules API

• #13666 RedisModule_ACLCheckKeyPrefixPermissions - check access permissions to any key matching a given prefix
• #13676 RedisModule_HashFieldMinExpire - query the minimum expiration time over all the hash’s fields
• #13676 RedisModule_HashGet - new REDISMODULE_HASH_EXPIRE_TIME flag - query the field expiration time
• #13656 RedisModule_RegisterXXXConfig - allow registering unprefixed configuration parameters

Configuration parameters

• replica-full-sync-buffer-limit - maximum size of accumulated replication stream data on the replica side
• io-threads-do-reads is no longer effective. The new I/O threading implementation always use threads for both reads and writes

Performance and resource utilization improvements

• #13638 Optimize CRC64 performance
• #13521 Optimize commands with large argument count - reuse c->argv after command execution
• #13558 Optimize PFCOUNT and PFMERGE - SIMD acceleration
• #13644 Optimize GET on high pipeline use-cases
• #13646 Optimize EXISTS - prefetching and branch prediction hints
• #13652 Optimize LRANGE - improve listpack handling and decoding efficiency
• #13655 Optimize HSET - avoid unnecessary hash field creation or deletion
• #13721 Optimize LRANGE and HGETALL - refactor client write preparation and handling

known bugs and limitations

• Query Engine - config params access via CONFIG SET/GET are disabled
• Missing support for FILTER and GEOFILTER in FT.SEARCH