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178 lines
10 KiB
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178 lines
10 KiB
Plaintext
Redis Community Edition 7.4 release notes
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=========================================
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--------------------------------------------------------------------------------
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Upgrade urgency levels:
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LOW: No need to upgrade unless there are new features you want to use.
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MODERATE: Program an upgrade of the server, but it's not urgent.
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HIGH: There is a critical bug that may affect a subset of users. Upgrade!
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CRITICAL: There is a critical bug affecting MOST USERS. Upgrade ASAP.
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SECURITY: There are security fixes in the release.
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--------------------------------------------------------------------------------
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================================================================================
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Redis Community Edition 7.4.1 Released Wed 02 Oct 2024 20:17:04 IDT
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================================================================================
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Upgrade urgency SECURITY: See security fixes below.
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Security fixes
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==============
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* (CVE-2024-31449) Lua library commands may lead to stack overflow and potential RCE.
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* (CVE-2024-31227) Potential Denial-of-service due to malformed ACL selectors.
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* (CVE-2024-31228) Potential Denial-of-service due to unbounded pattern matching.
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================================================================================
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Redis Community Edition 7.4.0 GA Released Mon Jul 29 2024 9:00:00 IDT
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================================================================================
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This is the General Availability release of Redis Community Edition 7.4.
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Changes to new 7.4 features (compared to 7.4 RC2)
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=================================================
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* #13391,#13438 Hash - expiration of individual fields: RDB file format changes
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* #13372 Hash - expiration of individual fields: rename and fix counting of `expired_subkeys` metric
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* #13372 Hash - expiration of individual fields: rename `INFO` keyspace field to `subexpiry`
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Configuration parameters
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========================
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* #13400 Add hide-user-data-from-log - allows hiding user data from the log file
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Bug fixes
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=========
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* #13407 trigger Lua GC after `SCRIPT LOAD`
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* #13380 Fix possible crash due to OOM panic on invalid command
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* #13383 `FUNCTION FLUSH` - improve Lua GC behavior and fix thread race in ASYNC mode
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* #13408 `HEXPIRE`-like commands should emit HDEL keyspace notification if expire time is in the past
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================================================================================
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Redis Community Edition 7.4 RC2 Released Thu 27 Jun 2024 10:00:00 IST
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================================================================================
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Upgrade urgency LOW: This is the second Release Candidate for Redis Community Edition 7.4.
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Performance and resource utilization improvements
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=================================================
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* #13296 Optimize CPU cache efficiency
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Changes to new 7.4 new features (compared to 7.4 RC1)
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=====================================================
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* #13343 Hash - expiration of individual fields: when key does not exist - reply with an array (nonexisting code for each field)
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* #13329 Hash - expiration of individual fields: new keyspace event: `hexpired`
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Modules API - Potentially breaking changes to new 7.4 features (compared to 7.4 RC1)
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====================================================================================
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* #13326 Hash - expiration of individual fields: avoid lazy expire when called from a Modules API function
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================================================================================
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Redis Community Edition 7.4 RC1 Released Thu 6 Jun 2024 10:00:00 IST
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================================================================================
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Note: License changed - see LICENSE.txt
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Upgrade urgency LOW: This is the first Release Candidate for Redis Community Edition 7.4.
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Here is a comprehensive list of changes in this release compared to 7.2.5.
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New Features
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============
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* #13303 Hash - expiration of individual fields. 9 commands were introduced:
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- `HEXPIRE` and `HPEXPIRE` set the remaining time to live for specific fields
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- `HEXPIREAT` and `HPEXPIREAT` set the expiration time to a UNIX timestamp for specific fields
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- `HPERSIST` removes the expiration for specific fields
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- `HEXPIRETIME` and `HPEXPIRETIME` get the expiration time for specific fields
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- `HTTL` and `HPTTL` get the remaining time to live for specific fields
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* #13117 `XREAD`: new id value `+` to start reading from the last message
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* #12765 `HSCAN`: new [NOVALUES] flag to report only field names
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* #12728 `SORT`, `SORT_RO`: allow `BY` and `GET` options in cluster mode when the pattern maps to the same slot as the key
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* #12299 `CLIENT KILL`: new optional filter: `MAXAGE maxage` - retain connections older than `maxage` seconds
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* #12971 Lua: expose `os.clock()` API for getting the elapsed time of Lua code execution
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* #13276 Allow `SPUBLISH` command within `MULTI ... EXEC` transactions on replica
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Bug fixes
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=========
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* #12898 `XREADGROUP`: fix entries-read inconsistency between master and replicas
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* #13042 `SORT ... STORE`: fix created lists to respect list compression and packing configs
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* #12817, #12905 Fix race condition issues between the main thread and module threads
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* #12577 Unsubscribe all clients from replica for shard channel if the master ownership changes
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* #12622 `WAITAOF` could timeout or hang if used after a module command that propagated effects only to replicas and not to AOF
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* #11734 `BITCOUNT` and `BITPOS` with nonexistent key and illegal arguments return an error, not 0
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* #12394 `BITCOUNT`: check for wrong argument before checking if key exists
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* #12961 Allow execution of read-only transactions when out of memory
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* #13274 Fix crash when a client performs ACL change that disconnects itself
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* #13311 Cluster: Fix crash due to unblocking client during slot migration
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Security improvements
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=====================
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* #13108 Lua: LRU eviction for scripts generated with `EVAL` *** BEHAVIOR CHANGE ***
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* #12961 Restrict the total request size of `MULTI ... EXEC` transactions
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* #12860 Redact ACL username information and mark '*-key-file-pass configs' as sensitive
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Performance and resource utilization improvements
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=================================================
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* #12838 Improve performance when many clients call `PUNSUBSCRIBE` / `SUNSUBSCRIBE` simultaneously
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* #12627 Reduce lag when waking `WAITAOF` clients and there is not much traffic
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* #12754 Optimize `KEYS` when pattern includes hashtag and implies a single slot
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* #11695 Reduce memory and improve performance by replacing cluster metadata with slot specific dictionaries
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* #13087 `SCRIPT FLUSH ASYNC` now does not block the main thread
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* #12996 Active memory defragmentation efficiency improvements
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* #12899 Improve performance of read/update operation during rehashing
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* #12536 `SCAN ... MATCH`: Improve performance when the pattern implies cluster slot
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* #12450 `ZRANGE ... LIMIT`: improved performance
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Other general improvements
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==========================
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* #13133 Lua: allocate VM code with jemalloc instead of libc and count it as used memory *** BEHAVIOR CHANGE ***
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* #12171 `ACL LOAD`: do not disconnect all clients *** BEHAVIOR CHANGE ***
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* #13020 Allow adjusting defrag configurations while active defragmentation is running
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* #12949 Increase the accuracy of avg_ttl (the average keyspace keys TTL)
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* #12977 Allow running `WAITAOF` in scripts
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* #12782 Implement TCP keep-alive across most Unix-like systems
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* #12707 Improved error codes when rejecting scripts in cluster mode
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* #12596 Support `XREAD ... BLOCK` in scripts; rejected only if it ends up blocking
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New metrics
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===========
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* #12849 `INFO`: `pubsub_clients` - number of clients in Pub/Sub mode
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* #12966 `INFO`: `watching_clients` - number of clients that are watching keys
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* #12966 `INFO`: `total_watched_keys` - number of watched keys
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* #12476 `INFO`: `client_query_buffer_limit_disconnections` - count client input buffer OOM events
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* #12476 `INFO`: `client_output_buffer_limit_disconnections` - count client output buffer OOM events
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* #12996 `INFO`: `allocator_muzzy` - memory returned to the OS but still shows as RSS until the OS reclaims it
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* #13108 `INFO`: `evicted_scripts` - number of evicted eval scripts. Users can check it to see if they are abusing EVAL
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* #12996 `MEMORY STATS`: `allocator.muzzy` - memory returned to the OS but still shows as RSS until the OS reclaims it
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* #12913 `INFO MEMORY` `mem_overhead_db_hashtable_rehashing` - memory resharding overhead (only the memory that will be released soon)
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* #12913 `MEMORY STATS': `overhead.db.hashtable.lut` - total overhead of dictionary buckets in databases
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* #12913 `MEMORY STATS': `overhead.db.hashtable.rehashing` - temporary memory overhead of database dictionaries currently being rehashed
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* #12913 `MEMORY STATS': `db.dict.rehashing.count` - number of top level dictionaries currently being rehashed
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* #12966 `CLIENT LIST`: `watch` - number of keys each client is currently watching
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Modules API
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===========
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* #12985 New API calls: `RM_TryCalloc` and `RM_TryRealloc` - allow modules to handle memory allocation failures gracefully
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* #13069 New API call: `RM_ClusterKeySlot` - which slot a key will hash to
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* #13069 New API call: `RM_ClusterCanonicalKeyNameInSlot` - get a consistent key that will map to a slot
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* #12486 New API call: `RM_AddACLCategory` - allow modules to declare new ACL categories
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Configuration parameters
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========================
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* #12178 New configuration parameters: `max-new-connections-per-cycle` and `max-new-tls-connections-per-cycle` to limit the number of new client connections per event-loop cycle
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* #7351 Rename some CPU configuration parameters for style alignment. Added alias to the old names to avoid breaking change
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CLI tools
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=========
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* #10609 redis-cli: new `-t <timeout>` argument: specify server connection timeout in seconds
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* #11315 redis-cli: new `-4` and `-6` flags to prefer IPV4 or IPV6 on DNS lookup
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* #12862 redis-cli: allows pressing up arrow to return any command (including sensitive commands which are still not persisted)
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* #12543 redis-cli: add reverse history search (like Ctrl+R in terminals)
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* #12826 redis-cli: add `--keystats` and `--keystats-samples` to combines `--memkeys` and `--bigkeys` with additional distribution data
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* #12735 redis-cli: fix: `--bigkeys` and `--memkeys` now work on cluster replicas
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* #9411 redis-benchmark: add support for binary strings
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* #12986 redis-benchmark: fix: pick random slot for a node to distribute operation across slots
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