-This is Redis 2.3.x.
+Redis 2.6 release notes
-It was forked from 2.2 branch a few weeks ago, and is going to be the playground
-for many new developments, especially related to replacing the VM with something
-better.
+Migrating from 2.4 to 2.6
+=========================
-VM is already completely removed from this release, and instead diskstore was
-implemented. You can read more about it here:
+Redis 2.4 is mostly a strict subset of 2.6. However there are a few things
+that you should be aware of:
-http://groups.google.com/group/redis-db/browse_thread/thread/d444bc786689bde9
+* You can't use .rdb and AOF files generated with 2.6 into a 2.4 instance.
+* 2.4 slaves can be attached to 2.6 masters, but not the contrary, and only
+ for the time needed to perform the version upgrade.
-This Redis version is not intented for production environments.
+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.
+
+Also the following redis.conf and CONFIG GET / SET parameters changed name:
+
+ * hash-max-zipmap-entries, now replaced by hash-max-ziplist-entries
+ * hash-max-zipmap-value, now replaced by hash-max-ziplist-value
+ * glueoutputbuf was no completely removed as it does not make sense
+
+---------
+CHANGELOG
+---------
+
+What's new in Redis 2.6.0
+=========================
+
+UPGRADE URGENCY: We suggest new users to start with 2.6.0, and old users to
+ upgrade after some testing of the application with the new
+ Redis version.
+
+* 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.
+* Clients max output buffer soft and hard limits. You can specifiy different
+ limits for different classes of clients (normal,pubsub,slave).
+* 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.
+
+--------------------------------------------------------------------------------
+
+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