Redis Community Edition 8.0 release notes ========================================= =========================================================== 8.0-M01 (v7.9.224) Released Thu 12 Sep 2024 10:00:00 IST =========================================================== This is the first 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: Redis 8.0 introduces new data structures: JSON, time series, and 5 probabilistic data structures (previously available as separate Redis modules) and incorporates Redis scalable query engine (including vector search). 8.0-M01 is available as a Docker image and can be downloaded from [Docker Hub](https://hub.docker.com/_/redis). Additional distributions will be introduced in upcoming pre-releases. ### Supported upgrade paths (by replication or persistence) to 8.0-M01 - From previous Redis versions, without modules The following upgrade paths (by replication or persistence) to 8.0-M01 are not yet tested and will be introduced in upcoming pre-releases: - From previous Redis versions with modules (RediSearch, RedisJSON, RedisTimeSeries, RedisBloom) - From Redis Stack 7.2 or 7.4 ### New Features in binary distributions - 7 new data structures: JSON, Time series, Bloom filter, Cuckoo filter, Count-min sketch, Top-k, t-digest - Redis scalable query engine (including vector search) ### Potentially breaking changes - #12272 `GETRANGE` returns an empty bulk when the negative end index is out of range - #12395 Optimize `SCAN` command when matching data type ### Bug fixes - #13510 Fix `RM_RdbLoad` to enable AOF after RDB loading is completed - #13489 `ACL CAT` - return module commands - #13476 Fix a race condition in the `cache_memory` of `functionsLibCtx` - #13473 Fix incorrect lag due to trimming stream via `XTRIM` command - #13338 Fix incorrect lag field in `XINFO` when tombstone is after the `last_id` of the consume group - #13470 On `HDEL` of last field - update the global hash field expiration data structure - #13465 Cluster: Pass extensions to node if extension processing is handled by it - #13443 Cluster: Ensure validity of myself when loading cluster config - #13422 Cluster: Fix `CLUSTER SHARDS` command returns empty array ### Modules API - #13509 New API calls: `RM_DefragAllocRaw`, `RM_DefragFreeRaw`, and `RM_RegisterDefragCallbacks` - defrag API to allocate and free raw memory ### Performance and resource utilization improvements - #13503 Avoid overhead of comparison function pointer calls in listpack `lpFind` - #13505 Optimize `STRING` datatype write commands - #13499 Optimize `SMEMBERS` command - #13494 Optimize `GEO*` commands reply - #13490 Optimize `HELLO` command - #13488 Optimize client query buffer - #12395 Optimize `SCAN` command when matching data type - #13529 Optimize `LREM`, `LPOS`, `LINSERT`, and `LINDEX` commands - #13516 Optimize `LRANGE` and other commands that perform several writes to client buffers per call - #13431 Avoid `used_memory` contention when updating from multiple threads ### Other general improvements - #13495 Reply `-LOADING` on replica while flushing the db ### CLI tools - #13411 redis-cli: Fix wrong `dbnum` showed after the client reconnected ### Notes - No backward compatibility for replication or persistence. - Additional distributions, upgrade paths, features, and improvements will be introduced in upcoming pre-releases. - With the GA release of 8.0 we will deprecate Redis Stack.