-Welcome to Redis 2.1.9 (2.2 Release Candidate 1)
-
-This is the first Release Candidate of Redis 2.2, in our experience the
-server is very stable, but in the latest weeks we rewrote part of the internals
-in order to use a lot less memory while the saving child process is performing
-a BGREWRITEAOF or a BGSAVE, so handle with care for a couple of weeks.
-
-WHAT'S NEW IN REDIS 2.2.x
-
-* Specially encoded data types, small lists and sets can now use up to an order of magnitude less memory.
-* VM partial rewrite for code cleaness and memory usage.
-* Change to the implementation of the top level dictionary for better memory efficienty.
-* redis-cli is hugely improved: tab completion, inline help (Thanks to TJ Holowaychuk), raw output, rewritten using the new hiredis C library.
-* Networking internals rewritten for efficiency. You can expect LRANGE and similar commands to be at least 10 times faster.
-* Most read only commands are now copy-on-write friendly, this means that Redis will use little memory when a saving child is active and the parent process is mostly stressed by read queries.
-* Non blocking replication even from the point of view of the slave, with configurable behavior about what to do when the link is disconnected. You can select if serving old data or replying with an error.
-* Check-and-set (CAS) transactions with the new WATCH command.
-* Now write operations work against keys with an EXPIRE set! Imagine the possibilities.
-* New maxmemory eviction policies. It is possible to select among LRU, farest TTL expire, and other algorithms, and if when the memory limit is reached only keys with an expire set or all the keys should be expired.
-* Syslog support (Thanks to Jonah H. Harris)
-* Unix domain socket support.
-* New List related functions LINSERT, LPUSHX, RPUSHX (Thanks to Robey Pointer)
-* BRPOPLPUSH (Thanks to Michel Martens and Damian Janowski)
-* Much more interesting informations in the INFO output.
-* Sorted sets are now less memory hungry.
-* Non blocking loading of .rdb / AOF file on startup, with process information in the INFO output.
-* Now Redis has a clean, powerful, supported C library: hiredis.
-* Code layout completely new, the 2.0.x huge redis.c file is now splitted in many parts.
-* Better MONITOR output.
-* Redis-benchmark rewritten to be faster and in order to use hiredis as well.
-* Endless other CPU optimizations and bugs fixed.
-
-Credits: Where not specified the implementation and design are done by Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all this possible. Also many thanks to all the other contributors and the amazing community we have.
+Redis 2.6 release notes
+=======================
+
+** IMPORTANT ** Check the 'Migrating from 2.4 to 2.6' section at the end of
+ this file for information about what changed between 2.4 and
+ 2.6 and how this may affect your application.
+
+--------------------------------------------------------------------------------
+Upgrade urgency levels:
+
+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.
+--------------------------------------------------------------------------------
+
+--[ Redis 2.6.4 ]
+
+UPGRADE URGENCY: LOW
+
+* [IMPROVED] BSD license and copyright notice added to every .c and .h file.
+
+--[ Redis 2.6.2 ]
+
+UPGRADE URGENCY: LOW
+
+* [BUGFIX] The compilation fix for RHLE5 in 2.6.1 was broken. Fixed.
+* [IMPROVED] Linenoise updated, now supports Ctrl+w.
+
+---[ Redis 2.6.1 ]
+
+UPGRADE URGENCY: LOW
+
+* [BUGFIX] Compilation on Linux < 2.6.17 or glibc < 2.6 fixed (RHLE5 & co).
+
+---[ Redis 2.6.0 ]
+
+UPGRADE URGENCY: HIGH
+
+* [BUGFIX] Allow AUTH when server is in -BUSY state because of a slow script.
+* [BUGFIX] MULTI/EXEC flow now makes sense when observed in MONITOR
+* [BUGFIX] SCRIPT KILL now uses different error prefixes for different errors.
+* [BUGFIX] Default memory limit for 32bit archs lowered from 3.5 to 3 GB.
+* [BUGFIX] redis-check-dump is now compatible with RDB files generated by 2.6.
+* [IMPROVED] New field in INFO: slave_read_only.
+
+---[ Redis 2.5.14 (2.6 Release Candidate 8) ]
+
+* [BUGFIX] Fixed compilation on FreeBSD.
+* [IMPROVED] SRANDMEMBER <count> that returns multiple random elements.
+* [IMPROVED] Sentinel backported to 2.6. It will be taken in sync with 2.8.
+* [IMPROVED] Helper function for scripting to return errors and status replies.
+* [IMPROVED] SORT by nosort [ASC|DESC] uses sorted set elements ordering.
+* [BUGFIX] Better resistence to system clock skew.
+* [IMPROVED] Warn the user when the configured maxmemory seems odd.
+* [BUGFIX] Hashing function is now murmurhash2 for security purposes.
+* [IMPROVED] Install script no longer uses a template but redis.conf itself.
+
+---[ Redis 2.5.13 (2.6 Release Candidate 7) ]
+
+UPGRADE URGENCY: HIGH
+
+* [BUGFIX] Theoretical bug in ziplist fixed.
+* [BUGFIX] Better out of memory handling (Log produced in log file).
+* [BUGFIX] Incrementally flush RDB file on slave side while performing the
+ first synchronization with the master. This makes Redis less
+ blocking in environments where disk I/O is slow.
+* [BUGFIX] Don't crash with Lua's redis.call() without arguments.
+* [BUGFIX] Don't crash after a big number of Lua calls on 32 bit systems
+ because of a failed assertion.
+* [BUGFIX] Fix SORT behaviour when called from scripting.
+* [BUGFIX] Adjust slave PING period accordingly to REDIS_HZ define.
+* [BUGFIX] BITCOUNT: fix crash on overflowing arguments.
+* [BUGFIX] Return an error when SELECT argument is not an integer.
+* [BUGFIX] Blocking operations on lists were completely reimplemented for
+ correctness. Now blocking list ops and pushes originated from
+ Lua scripts will play well together and will be replicated
+ and transmitted to the AOF correctly.
+* [IMPROVED] Send async PING before starting replication to avoid blocking if
+ master allows us to connect but it is actually not able to reply.
+* [IMPROVED] Support slave-priority for Redis Sentinel.
+* [IMPROVED] Hiredis library updated.
+
+---[ Redis 2.5.12 (2.6 Release Candidate 6) ]
+
+UPGRADE URGENCY: MODERATE.
+
+* [BUGFIX] Fixed a timing attack on AUTH (Issue #560).
+* [BUGFIX] Don't assume that "char" is signed.
+* [BUGFIX] Check that we have connection before enabling pipe mode.
+* [BUGFIX] Use the optimized version of the function to convert a double to
+ its string representation. Compilation was disabled because of
+ a typo in the #if statement.
+* [IMPROVED} REPLCONF internal command introduced, now INFO shows slaves with
+ correct port numbers. This makes 2.5.12 Redis Sentinel compatible.
+* [IMPROVED] Truncate short write from the AOF for a cleaner restart. On short
+ writes (for instance out of space) Redis will now try to remove
+ the half-written data so that the next restart will work without
+ the need for the "redis-check-aof" utility.
+* [IMPROVED] New in INFO: aof_last_bgrewrite_status
+* [IMPROVED] Allow Pub/Sub in contexts where other commands are blocked.
+* [BUGFIX] mark fd as writable when EPOLLERR or EPOLLHUP is returned by
+ epoll_wait.
+
+---[ Redis 2.5.11 (2.6 Release Candidate 5) ]
+
+UPGRADE URGENCY: HIGH.
+
+* [BUGFIX] Fixed Hash corruption when loading an RDB file generated by
+ previous versions of Redis that encoded hashes using
+ a different ziplist encoding format for small integers.
+ All the fileds that are integers in the range 0-255 may not
+ be recognized, or duplicated un updates, causing a crash
+ when the ziplist is converted to a real hash. (Issue #547).
+* [BUGFIX] Fixed the count of memory used by output buffers in the
+ setDeferredMultiBulkLength() function.
+
+---[ Redis 2.5.10 (2.6 Release Candidate 4) ]
+
+UPGRADE URGENCY: HIGH.
+
+* [BUGFIX] Allow PREFIX to be overwritten on "make install".
+* [BUGFIX] Run the test with just one client if the computer is slow.
+* [BUGFIX] Event port support in our event driven libray.
+* [BUGFIX] Jemalloc updated to 3.0.0. This fixes a possibly AOF rewrite issue.
+ See https://github.com/antirez/redis/issues/504 for info.
+* [BUGFIX] Fixed issue #516: ZINTERSTORE / ZUNIONSTORE with mixed sets/zsets.
+* [BUGFIX] Set fd to writable when poll(2) detects POLLERR or POLLHUP event.
+* [BUGFIX] Fixed RESTORE hash failure (Issue #532).
+* [IMPROVED] Allow an AOF rewrite buffer > 2GB (Related to issue #504).
+* [IMPROVED] Server cron function frequency is now configurable (REDIS_HZ).
+* [IMPROVED] Better, less blocking expired keys collection algorithm.
+* [FEATURE] New commands: BITOP and BITCOUNT.
+* [FEATURE] redis-cli --pipe for mass import.
+
+What's new in Redis 2.5.9 (aka 2.6 Release Candidate 3)
+=======================================================
+
+UPGRADE URGENCY: critical, upgrade ASAP.
+
+* [BUGFIX] Fix for issue #500 (https://github.com/antirez/redis/pull/500).
+ Redis 2.6-RC1 and RC2 may corrupt ziplist-encoded sorted sets
+ produced by Redis 2.4.x.
+* [BUGFIX] Fixed several bugs in init.d script.
+* [BUGFIX] syncio.c functions modified for speed and correctness. On osx
+ (and possibly other BSD-based systems) the slave would block on
+ replication to send the SYNC command when the master was not
+ available. This is fixed now, but was not affecting Linux installs.
+* Now when slave-serve-stale-data is set to yes and the master is down, instead
+ of reporting a generic error Redis replies with -MASTERDOWN.
+
+What's new in Redis 2.5.8 (aka 2.6 Release Candidate 2)
+=======================================================
+
+UPGRADE URGENCY: high for all the users of the KEYS command, otherwise low.
+
+* [BUGFIX] Fix for KEYS command: if the DB contains keys with expires the KEYS
+ command may return the wrong output, having duplicated or missing
+ keys. See issue #487 and #488 on github for details.
+
+What's new in Redis 2.5.7 (aka 2.6 Release Candidate 1)
+=======================================================
+
+UPGRADE URGENCY: upgrade not recommended because this is an RC release.
+
+* This is the first release candidate for Redis 2.6. We are not aware of
+ bugs, but part of this code is young and was never tested in production
+ environments, so handle with care.
+
+An overview of new features and changes in Redis 2.6.x
+======================================================
+
+* Server side Lua scripting, see http://redis.io/commands/eval
+* Virtual Memory removed (was deprecated in 2.4)
+* Hardcoded limits about max number of clients removed.
+* AOF low level semantics is generally more sane, and especially when used
+ in slaves.
+* Milliseconds resolution expires, also added new commands with milliseconds
+ precision (PEXPIRE, PTTL, ...).
+* Better memory usage for "small" lists, ziplists and hashes when fields or
+ values contain small integers.
+* Read only slaves.
+* New bit opeations: BITCOUNT and BITOP commands.
+* Clients max output buffer soft and hard limits. You can specifiy different
+ limits for different classes of clients (normal,pubsub,slave).
+* More incremental (less blocking) expired keys collection algorithm, in
+ practical terms this means that Redis is more responsive when a very
+ big number of keys expire about at the same time.
+* AOF is now able to rewrite aggregate data types using variadic commands,
+ often producing an AOF that is faster to save, load, and is smaller in size.
+* Every redis.conf directive is now accepted as a command line option for the
+ redis-server binary, with the same name and number of arguments.
+* Hash table seed randomization for protection against collisions attacks.
+* Performances improved when writing large objects to Redis.
+* Integrated memory test, see redis-server --test-memory.
+* INCRBYFLOAT and HINCRBYFLOAT commands.
+* New DUMP, RESTORE, MIGRATE commands (back ported from Redis Cluster to 2.6).
+* CRC64 checksump in RDB files.
+* Better MONITOR output and behavior (now commands are logged before execution).
+* "Software Watchdog" feature to debug latency issues.
+* Significant parts of the core refactored or rewritten. New internal APIs
+ and core changes allowed to develop Redis Cluster on top of the new code,
+ however for 2.6 all the cluster code was removed, and will be released with
+ Redis 3.0 when it is more complete and stable.
+* Redis ASCII art logo added at startup.
+* Crash report on memory violation or failed asserts improved significantly
+ to make debugging of hard to catch bugs simpler.
+* redis-benchmark improvements: ability to run selected tests,
+ CSV output, faster, better help.
+* redis-cli improvements: --eval for comfortable development of Lua scripts.
+* SHUTDOWN now supports two optional arguments: "SAVE" and "NOSAVE".
+* INFO output split into sections, the command is now able to just show
+ pecific sections.
+* New statistics about how many time a command was called, and how much
+ execution time it used (INFO commandstats).
+* More predictable SORT behavior in edge cases.
+* Better support for big endian and *BSD systems.
+* Build system improved.
+
+Migrating from 2.4 to 2.6
+=========================
+
+Redis 2.4 is mostly a strict subset of 2.6. However there are a few things
+that you should be aware of:
+
+* You can't use .rdb and AOF files generated with 2.6 into a 2.4 instance.
+* 2.6 slaves can be attached to 2.4 masters, but not the contrary, and only
+ for the time needed to perform the version upgrade.
+
+There are also a few API differences, that are unlikely to cause problems,
+but it is better to keep them in mind:
+
+* SORT now will refuse to sort in numerical mode elements that can't be parsed
+ as numbers.
+* EXPIREs now all have millisecond resolution (but this is very unlikely to
+ break code that was not conceived exploting the previous resolution error
+ in some way.)
+* INFO output is a bit different now, and contains empty lines and comments
+ starting with '#'. All the major clients should be already fixed to work
+ with the new INFO format.
+* Slaves are only read-only by default (but you can change this easily
+ setting the "slave-read-only" configuration option to "no" editing your
+ redis.conf or using CONFIG SET.
+
+The following INFO fields were renamed for consistency:
+
+ changes_since_last_save -> rdb_changes_since_last_save
+ bgsave_in_progress -> rdb_bgsave_in_progress
+ last_save_time -> rdb_last_save_time
+ last_bgsave_status -> rdb_last_bgsave_status
+ bgrewriteaof_in_progress -> aof_rewrite_in_progress
+ bgrewriteaof_scheduled -> aof_rewrite_scheduled
+
+The following redis.conf and CONFIG GET / SET parameters changed:
+
+ * hash-max-zipmap-entries, now replaced by hash-max-ziplist-entries
+ * hash-max-zipmap-value, now replaced by hash-max-ziplist-value
+ * glueoutputbuf option was now completely removed (was deprecated)
+
+--------------------------------------------------------------------------------
+
+Credits: Where not specified the implementation and design are done by
+Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all
+this possible. Also many thanks to all the other contributors and the amazing
+community we have.
+
+See commit messages for more credits.
+
+Cheers,
+Salvatore
projects / redis.git / blobdiff