Compact hashes slash memory; HIMPORT, BACKUP commands ship

This is the General Availability release of Redis 8.10 in Redis Open Source.

Major changes compared to 8.8

• Compact hashes - a new hash encoding that reduces memory usage by storing hash field names just once for keys that share a schema
• New command: HIMPORT - high-throughput compact hash bulk insertion
• TLS peer certificate-based server-to-server authentication
• New commands: LMOVEM, BLMOVEM - move multiple elements between lists
• New command: SUNIONCARD - get the cardinality of the union of multiple sets
• New command: SDIFFCARD - get the cardinality of the difference between sets
• New command: BACKUP - node-side implementation for backup and restore based on multi-part AOF (MP-AOF)
• XREAD, XREADGROUP - new MAXCOUNT and MAXSIZE arguments to cap the cumulative reply entries and size
• New command: FT.ALIASLIST - get all aliases for the index
• Stemmer support for Malay and Tagalog languages
• JSONPath extensions
• New commands: TS.NRANGE, TS.NREVRANGE - Query a range across multiple time series; group results by timestamp
• New command: TS.READ - optionally blocking read
• New command: TS.QUERYLABELS - Get a list of labels and label-values
• New command: TS.MRANGE, TS.MREVRANGE - new EXCLUDEEMPTY argument to exclude series with no reported samples
• Performance improvements

Binary distributions

• Alpine and Debian Docker images - https://hub.docker.com/_/redis
• Install using snap - see https://github.com/redis/redis-snap
• Install using brew - see https://github.com/redis/homebrew-redis
• Install using RPM - see https://github.com/redis/redis-rpm
• Install using Debian APT - see https://github.com/redis/redis-debian

Operating systems we test Redis 8.10 on

• Ubuntu 22.04 (Jammy Jellyfish), 24.04 (Noble Numbat), 26.04 (Resolute Raccoon)
• Rocky Linux 8.10, 9.7, 10.1
• AlmaLinux 8.10, 9.7, 10.1
• Debian 12.13 (Bookworm), Debian 13.4 (Trixie)
• Alpine 3.23
• macOS 14.8.4 (Sonoma), 15.7.4 (Sequoia), 26.3 (Tahoe) - for both Intel and ARM

Bug fixes (compared to 8.10-RC2)

• #15513 Prevented a division-by-zero error when active defragmentation thresholds are configured with equal or reversed value
• #15453 Clients blocked on BLPOP, BLMOVE, or BLMOVEM could remain blocked after SORT with STORE replaced the target key with a list
• #15499 Memory usage reported for compressed replication clients could be lower than the actual memory consumed
• #15518 notify modules when node's own ip/port changes
• #15539 Loading an AOF file with an RDB preamble could fail when active defragmentation was enabled
• RediSearch/RediSearch#10528 Crash in the numeric range tree when background garbage collection encounters an empty leaf during active indexing on a numeric field. (MOD-16877)
• RediSearch/RediSearch#10605 FT.CREATE and FT.ALTER now reject an empty string as a field name, preventing a crash loop in the fork-GC on indexes with an empty TAG field. (MOD-17034)
• RediSearch/RediSearch#10488 FT.INFO reports a negative num_records after garbage collection on indexes that include an INDEXMISSING field. (MOD-16940)
• RediSearch/RediSearch#10568 Cluster FT.AGGREGATE fails with SEARCH_FIELD_DUP when a GROUPBY contains multiple REDUCE COLLECT calls over the same field differing only in option-keyword casing. (MOD-16365)
• RediSearch/RediSearch#10605 FT.CREATE and FT.ALTER now return an error when a field name is an empty string; previously such schemas were accepted silently. (MOD-17034)
• RediSearch/RediSearch#10522 coord_total_query_warnings_timeout double-counts timeout warnings for FT.SEARCH queries that use a hybrid (vector + filter) execution path. (MOD-15973)