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Added a release notes file good for "unstable".

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antirez 2014-02-10 15:38:54 +01:00
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00-RELEASENOTES
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Redis 2.6 release notes
Hello! This file is just a placeholder, since this is the "unstable" branch
of Redis, the place where all the development happens.
Migrating from 2.4 to 2.6
=========================
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.
Redis 2.4 is mostly a strict subset of 2.6. However there are a few things
that you should be aware of:
Usually "unstable" is stable enough for you to use it in development enviromnets
however you should never use it in production environments. It is possible
to download the latest stable release here:
* 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.
http://download.redis.io/releases/redis-stable.tar.gz
There are also a few API differences, that are unlikely to cause problems,
but it is better to keep them in mind:
More information is available at http://redis.io
* 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 now 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, ...).
* 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.
* 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.
* INCRBYFLOAT and HINCRBYFLOAT commands.
--------------------------------------------------------------------------------
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
Happy hacking!