8.0-M03

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

7.4.2

Upgrade urgency SECURITY: See security fixes below.

Security fixes

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

Bug fixes

• #13627 Crash on module memory defragmentation
• #13338 Streams: XINFO lag field is wrong when tombstone is after the last_id of the consume group
• #13473 Streams: XTRIM does not update the maximal tombstone, leading to an incorrect lag
• #13470 INFO after HDEL show wrong number of hash keys with expiration
• #13476 Fix a race condition in the cache_memory of functionsLibCtx
• #13626 Memory leak on failed RDB loading
• #13539 Hash: fix key ref for a hash that no longer has fields with expiration on RENAME/MOVE/SWAPDB/RESTORE
• #13443 Cluster: crash when loading cluster config
• #13422 Cluster: CLUSTER SHARDS returns empty array
• #13465 Cluster: incompatibility with older node versions
• #13608 Cluster: SORT ... GET #: incorrect error message

7.2.7

Upgrade urgency SECURITY: See security fixes below.

Security fixes

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

Bug fixes

• #13380 Possible crash due to OOM panic on invalid command
• #13338 Streams: XINFO lag field is wrong when tombstone is after the last_id of the consume group
• #13473 Streams: XTRIM does not update the maximal tombstone, leading to an incorrect lag
• #13311 Cluster: crash due to unblocking client during slot migration
• #13443 Cluster: crash when loading cluster config
• #13422 Cluster: CLUSTER SHARDS returns empty array
• #13465 Cluster: incompatibility with older node versions

6.2.17

Upgrade urgency SECURITY: See security fixes below.

Security fixes

• (CVE-2024-46981) Lua script commands may lead to remote code execution

8.0-M02

This is the second 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-M02 introduces significant performance improvements. Both Alpine and Debian Docker images are now available on Docker Hub. Additional distributions will be introduced in upcoming pre-releases. In addition, Redis Query Engine now supports both horizontal and vertical scaling for search, query and vector workloads.

Supported upgrade paths (by replication or persistence) to 8.0-M02

• From previous Redis versions, without modules

The following upgrade paths (by replication or persistence) to 8.0-M02 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

Security fixes

• (CVE-2024-31449) Lua library commands may lead to stack overflow and potential RCE.
• (CVE-2024-31227) Potential Denial-of-service due to malformed ACL selectors.
• (CVE-2024-31228) Potential Denial-of-service due to unbounded pattern matching.

Bug fixes

• #13539 Hash: Fix key ref for a hash that no longer has fields with expiration on RENAME/MOVE/SWAPDB/RESTORE
• #13512 Fix TOUCH command from a script in no-touch mode
• #13468 Cluster: Fix cluster node config corruption caused by mixing shard-id and non-shard-id versions
• #13608 Cluster: Fix GET # option in SORT command

Modules API

• #13526 Extend RedisModule_OpenKey to read also expired keys and subkeys

Performance and resource utilization improvements

• #11884 Optimize ZADD and ZRANGE* commands
• #13530 Optimize SSCAN command in case of listpack or intset encoding
• #13531 Optimize HSCAN/ZSCAN command in case of listpack encoding
• #13520 Optimize commands that heavily rely on bulk/mbulk replies (example of LRANGE)
• #13566 Optimize ZUNION[STORE] by avoiding redundant temporary dict usage
• #13567 Optimize SUNION/SDIFF commands by avoiding redundant temporary dict usage
• #11533 Avoid redundant lpGet to boost quicklistCompare
• #13412 Reduce redundant call of prepareClientToWrite when call addReply* continuously

Notes

• 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.

7.4.1

Upgrade urgency SECURITY: See security fixes below.

Security fixes

• (CVE-2024-31449) Lua library commands may lead to stack overflow and potential RCE
• (CVE-2024-31227) Potential Denial-of-service due to malformed ACL selectors
• (CVE-2024-31228) Potential Denial-of-service due to unbounded pattern matching

7.2.6

Upgrade urgency SECURITY: See security fixes below.

Security fixes

• (CVE-2024-31449) Lua library commands may lead to stack overflow and potential RCE
• (CVE-2024-31227) Potential Denial-of-service due to malformed ACL selectors
• (CVE-2024-31228) Potential Denial-of-service due to unbounded pattern matching

Bug fixes

• #13315 Fixed crashes in cluster mode

6.2.16

Upgrade urgency SECURITY: See security fixes below.

Security fixes

• (CVE-2024-31449) Lua library commands may lead to stack overflow and potential RCE.
• (CVE-2024-31228) Potential Denial-of-service due to unbounded pattern matching.

8.0-M01

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. 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.

7.4.0

This is the General Availability release of Redis Community Edition 7.4.

Changes to new 7.4 features (compared to 7.4 RC2)

• #13391, #13438 Hash - expiration of individual fields: RDB file format changes
• #13372 Hash - expiration of individual fields: rename and fix counting of expired_subkeys metric
• #13372 Hash - expiration of individual fields: rename INFO keyspace field to subexpiry

Configuration parameters

• #13400 Add hide-user-data-from-log - allows hiding user data from the log file

Bug fixes

• #13407 Trigger Lua GC after SCRIPT LOAD
• #13380 Fix possible crash due to OOM panic on invalid command
• #13383 FUNCTION FLUSH - improve Lua GC behavior and fix thread race in ASYNC mode
• #13408 HEXPIRE-like commands should emit HDEL keyspace notification if expire time is in the past