X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/5215ab1418479ba7820ddfcf0f342305be4b7e24..1858da2faae3b6a8becf4f7eef3f712d6e4b986b:/00-RELEASENOTES

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-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 intended 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 option was now completely removed (was deprecated)
+
+---------
+CHANGELOG
+---------
+
+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.
+* 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