Valkey 9.0.0-rc1 release notes and version.h bump (#2476)

As per step 2 of the release checklist #2408 for 9.0.0-rc1

---------

Signed-off-by: Kyle J. Davis <[email protected]>
Co-authored-by: Madelyn Olson <[email protected]>
Co-authored-by: Viktor Söderqvist <[email protected]>
Co-authored-by: Harkrishn Patro <[email protected]>
Co-authored-by: Ping Xie <[email protected]>
Co-authored-by: Wen Hui <[email protected]>

Author: 6 people

00-RELEASENOTES

@@ -1,16 +1,212 @@
-Hello! This file is just a placeholder, since this is the "unstable" branch
-of Valkey, the place where all the development happens.
+Valkey 9.0 release notes
+========================
 
-There is no release notes for this branch, it gets forked into another branch
-every time there is a partial feature freeze in order to eventually create
-a new stable release.
+Upgrade urgency levels:
 
-Usually "unstable" is stable enough for you to use it in development environments
-however you should never use it in production environments. It is possible
-to download the latest stable release here:
+| Level    | Meaning                                                             |
+|----------|---------------------------------------------------------------------|
+| LOW      | No need to upgrade unless there are new features you want to use.   |
+| MODERATE | Program an upgrade of the server, but it's not urgent.              |
+| HIGH     | There is a critical bug that may affect a subset of users. Upgrade! |
+| CRITICAL | There is a critical bug affecting MOST USERS. Upgrade ASAP.         |
+| SECURITY | There are security fixes in the release.                            |
 
-    https://valkey.io/download/
+Valkey 9.0.0-rc1 - August 14, 2025
+----------------------------------
 
-More information is available at https://valkey.io
+Upgrade urgency LOW: This is the first release candidate of Valkey 9.0.0, with
+performance improvements, atomic slot migrations, hash field expiration, and numbered databases in cluster mode,
+as well as a whole host of new items as listed below.
 
-Happy hacking!
+### New Features
+* Client Commands Extended Filtering by @sarthakaggarwal97 (#1466)
+* Add multi-database support to cluster mode by @xbasel (#1671)
+* Support BYPOLYGON option for GEOSEARCH by @KarthikSubbarao (#1809)
+* Introduce MPTCP by @pizhenwei (#1811)
+* Add sentinel_total_tilt to sentinel INFO sentinel by @carlosfu (#1904)
+* Add support for automatic client authentication via TLS certificate fields by @omanges (#1920)
+* Add --hotkeys-count option for valkey-cli by @hwware (#1933)
+* Introduce atomic slot migration by @murphyjacob4 (#1949)
+* Introduce MPTCP for replica by @pizhenwei (#1961)
+* Add DELIFEQ command by @LinusU (#1975)
+* Allow dynamic modification of io-threads num by @ayush933 (#2033)
+* Introduce HASH items expiration by @ranshid (#2089)
+* Add SAFE option to SHUTDOWN to reject shutdown in unsafe situations by @enjoy-binbin (#2195)
+* Support negative filtering for client command filters by @soloestoy (#2378)
+
+### New Configs
+* Auto-failover on shutdown unified config by @zuiderkwast (#2292)
+
+### Logging and Tooling Improvements
+* Add node pfail and fail count to cluster info metrics by @hpatro (#1910)
+* Introduce support for lttng based tracing by @artikell (#2070)
+
+### Performance/Efficiency Improvements
+* Optimize bitcount command by SIMD by @chzhoo (#1741)
+* Save RDB file to disk using a background thread on replica(s) (#1784)
+* Improve replication stability by prioritizing replication traffic in the replica by @xbasel (#1838)
+* Optimize hyperloglog commands with ARM NEON SIMD instructions by @xbasel (#1859)
+* Optimize BITCOUNT using ARM NEON SIMD by @xbasel (#1867)
+* Optimize string-to-integer performance using AVX512 by @zhulipeng (#1944)
+* Improve system responsiveness by limiting number of new cluster link connections per cycle by @hpatro (#2009)
+* Optimize hash table performance using SIMD by @zhulipeng (#2030)
+* Improve performance of network operations by directly writing responses to clients by @xbasel (#2078)
+* Allow shrinking hashtables in low memory situations by @Fusl (#2095)
+* Optimize string2ll with load-time CPU feature check using IFUNC resolver by @zhulipeng (#2099)
+* Optimize WATCH by equalStringObjects early length check by @vitahlin (#2107)
+* Optimize GEORADIUS command performance with pre-allocated buffer by @chzhoo (#2116)
+* Improve zcount performance by combing range element ranks calculation with range elements search to @SoftlyRaining (#2129)
+* Optimize scan/sscan/hscan/zscan commands by replacing list with vector by @chzhoo (#2160)
+
+### Cluster
+* Trigger manual failover on SIGTERM / shutdown to cluster primary by @enjoy-binbin (#1091)
+* Add CLUSTER FLUSHSLOT command by @wuranxx (#1384)
+* Allow replicas to become primaries without data by using CLUSTER REPLICATE NO ONE by @skolosov-snap (#1674)
+* Add cluster bus port out of range error message for CLUSTER MEET command by @hwware (#1686)
+* Add cluster-manual-failover-timeout to configure the timeout for manual failover by @enjoy-binbin (#1690)
+
+### Module
+* Add new module API flag to bypass command validation by @sungming2 (#1357)
+
+### Bug Fixes
+* Avoid shard id update of replica if it doesn't match with primary shard id by @hpatro (#573)
+* Change "Redis ver." to "Valkey ver." in LOLWUT output by @sarthakaggarwal97 (#1559)
+* Fix temp file leak during replication error handling by @enjoy-binbin (#1721)
+* Fix raxRemove crash at memcpy() due to key size exceeds max Rax size by @VoletiRam (#1722)
+* Respect process umask when creating data files by @kronwerk (#1725)
+* Fix error "SSL routines::bad length" when connTLSWrite is called second time with smaller buffer by @zori-janea (#1737)
+* cmd's out bytes need count deferred reply by @soloestoy (#1760)
+* Enable TCP_NODELAY by default in incoming and outgoing connections by @sungming2 (#1763)
+* Ignore stale gossip packets that arrive out of order by @enjoy-binbin (#1777)
+* Remove unicode optimization in Lua cjson library by @rjd15372 (#1785)
+* Save config file and broadcast PONG message on configEpoch change by @enjoy-binbin (#1813)
+* Fix engine crash on module client blocking during keyspace events by @yairgott (#1819)
+* Fix bug where invalidation messages were getting sent to closing clients by @madolson (#1823)
+* Fix ACL LOAD crash on replica since the primary client don't has a user by @bogdanp05 (#1842)
+* Fix RANDOMKEY infinite loop during CLIENT PAUSE by @li-benson (#1850)
+* Improve clarity of errors for GEO commands when member does not exist by @chx9 (#1943)
+* Fix panic in primary when blocking shutdown after previous block with timeout by @murphyjacob4 (#1948)
+* fix cluster slot stats assertion during promotion of replica by @Fusl (#1950)
+* Fix incorrect lag reported in XINFO GROUPS by @nesty92 (#1952)
+* Fix crash during TLS handshake with I/O threads by @uriyage (#1955)
+* Disallow sending REPLY ON / OFF / SKIP inside a multi-exec transaction by @sarthakaggarwal97 (#1966)
+* Fix random element in skewed sparse hash table by @zuiderkwast (#2085)
+* Allow mixing quoted and unquoted inline args by @Fusl (#2098)
+* Only mark the client reprocessing flag when unblocked on keys by @ranshid (#2109)
+* CLIENT UNBLOCK should't be able to unpause paused clients by @enjoy-binbin (#2117)
+* Fix memory corruption in sharded pubsub unsubscribe by @uriyage (#2137)
+* Detect SSL_new() returning NULL in outgoing connections by @zuiderkwast (#2140)
+* Correctly handle large cluster bus extensions which may have resulted in dropped cluster packets by @madolson (#2144)
+* Converge divergent shard-id persisted in nodes.conf to primary's shard ID by @hpatro (#2174)
+* Fix replica can't finish failover when config epoch is outdated by @enjoy-binbin (#2178)
+* Fix CLUSTER SLOTS/NODES showing wrong port after updating port/tls-port by @enjoy-binbin (#2186)
+* Fix use-after-free when active expiration triggers hashtable to shrink by @gusakovy (#2257)
+* Redact user data when a module crashes for not handling I/O errors enabled by @YueTang-Vanessa (#2274)
+* Generate a new shard_id when the replica executes CLUSTER RESET SOFT by @enjoy-binbin (#2283)
+* Fix missing response when AUTH returns an error inside a transaction by @enjoy-binbin (#2287)
+* Fix memory leak when shrinking a hashtable without entries by @yzc-yzc (#2288)
+* Fix MEMORY USAGE to consider embedded keys by @yulazariy (#2290)
+* Fix replicas claiming to still have slots after manual failover by @enjoy-binbin (#2301)
+* Prevent bad memory access when NOTOUCH client gets unblocked by @uriyage (#2347)
+* Fix large allocations crashing Valkey during active defrag by @Fusl (#2353)
+
+### Build and Tooling
+* Support for RDB analysis reports by @artikell (#1743)
+* Implement RPS control for valkey-benchmark by @artikell (#1761)
+* valkey-cli: ensure output ends with a newline if missing when printing reply by @xbasel (#1782)
+* Drop lua object files on clean by @secwall (#1812)
+* Check both arm64 and aarch64 for ARM based system architecture by @eifrah-aws (#1829)
+* Add --sequential option to valkey-benchmark to support populating entire keyspace by @SoftlyRaining (#1839)
+* Support environment variable VALKEYCLI_AUTH alongside REDISCLI_AUTH in valkey-cli by @HiranmoyChowdhury (#1995)
+* Add MGET test to valkey-benchmark by @zuiderkwast (#2015)
+* Add support to send multiple arbitrary commands to valkey-benchmark by @zuiderkwast (#2057)
+* Support RDMA for valkey-cli and benchmark by @pizhenwei (#2059)
+* Support MPTCP for valkey-cli and benchmark by @pizhenwei (#2067)
+* Allow valkey-benchmark to support multiple random (or sequential) placeholders  by @SoftlyRaining (#2102)
+* Change default values of valkey-cli to use valkey naming, and added fallback to old values by @avifenesh (#2334)
+* Fix duplicate Acks for RDMA events and fix extremely large max latency for RDMA benchmark (#2430)
+
+### Behavior Change
+* Move auth check to the front, before command exist/arity/protected check by @enjoy-binbin (#1475)
+* Include command fullname in error message when returning errors in multi-execs by @enjoy-binbin (#2286)
+* Add STALE command flag to SCRIPT-EXISTS, SCRIPT-SHOW and SCRIPT-FLUSH by @enjoy-binbin (#2419)
+
+### Contributors
+* Ran Shidlansik @ranshid
+* Binbin @enjoy-binbin
+* Jacob Murphy @murphyjacob4
+* Madelyn Olson @madolson
+* YueTang-Vanessa  @YueTang-Vanessa
+* cxljs @cxljs
+* Sarthak Aggarwal @sarthakaggarwal97
+* amanosme @amanosme
+* Hanxi Zhang @hanxizh9910
+* Seungmin Lee @sungming2
+* uriyage @uriyage
+* Katie Holly @Fusl
+* Nicky-2000 @Nicky-2000
+* Allen Samuels @allenss-amazon
+* yzc-yzc @yzc-yzc
+* zhaozhao.zz @soloestoy
+* asagegeLiu @asagege
+* nitaicaro @nitaicaro
+* Matthew @utdrmac
+* Omkar Mestry @omanges
+* Viktor Söderqvist @zuiderkwast
+* kukey @kukey
+* Harkrishn Patro @hpatro
+* Avi Fenesh @avifenesh
+* Amit Nagler @naglera
+* Josh Soref @jsoref
+* youngmore1024 @youngmore1024
+* Rain Valentine @SoftlyRaining
+* skyfirelee @artikell
+* Wen Hui @hwware
+* yulazariy @yulazariy
+* Yakov Gusakov @gusakovy
+* charsyam @charsyam
+* Simon Baatz @gmbnomis
+* Thalia Archibald @thaliaarchi
+* chzhoo @chzhoo
+* xbasel @xbasel
+* Stav Ben-Tov @stav-bentov
+* wuranxx @wuranxx
+* Ayush Sharma @ayush933
+* chx9 @chx9
+* KarthikSubbarao @KarthikSubbarao
+* Hüseyin Açacak @huseyinacacak-janea
+* アンドリー・アンドリ @odaysec
+* Ping Xie @PingXie
+* Lipeng Zhu @zhulipeng
+* Linus Unnebäck @LinusU
+* Vitah Lin @vitahlin
+* kronwerk @kronwerk
+* Vadym Khoptynets @poiuj
+* muelstefamzn @muelstefamzn
+* zhenwei pi @pizhenwei
+* George Padron @DoozkuV
+* Björn Svensson @bjosv
+* aradz44 @aradz44
+* Hiranmoy Das Chowdhury @HiranmoyChowdhury
+* Yair Gottdenker @yairgott
+* Roshan Khatri @roshkhatri
+* nesty92 @nesty92
+* carlosfu @carlosfu
+* Arthur Lee @arthurkiller
+* Shai Zarka @zarkash-aws
+* Sergey Kolosov @skolosov-snap
+* Nathan Scott @natoscott
+* lucasyonge @lucasyonge
+* WelongZuo @WelongZuo
+* Jim Brunner @JimB123
+* jeon1226 @jeon1226
+* Benson-li @li-benson
+* Meinhard Zhou @MeinhardZhou
+* Nikhil Manglore @Nikhil-Manglore
+* Bogdan Petre @bogdanp05
+* eifrah-aws @eifrah-aws
+* Ricardo Dias @rjd15372
+* secwall @secwall
+* Anastasia Alexandrova @nastena1606
+* Marek Zoremba @zori-janea
+* VoletiRam @VoletiRam

src/version.h

@@ -4,13 +4,13 @@
  * similar. */
 #define SERVER_NAME "valkey"
 #define SERVER_TITLE "Valkey"
-#define VALKEY_VERSION "255.255.255"
-#define VALKEY_VERSION_NUM 0x00ffffff
+#define VALKEY_VERSION "9.0.0"
+#define VALKEY_VERSION_NUM 0x00090000
 /* The release stage is used in order to provide release status information.
  * In unstable branch the status is always "dev".
  * During release process the status will be set to rc1,rc2...rcN.
  * When the version is released the status will be "ga". */
-#define VALKEY_RELEASE_STAGE "dev"
+#define VALKEY_RELEASE_STAGE "rc1"
 
 /* Redis OSS compatibility version, should never
  * exceed 7.2.x. */