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86 lines
3.7 KiB
Plaintext
86 lines
3.7 KiB
Plaintext
Redis 2.6 release notes
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Migrating from 2.4 to 2.6
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=========================
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Redis 2.4 is mostly a strict subset of 2.6. However there are a few things
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that you should be aware of:
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* You can't use .rdb and AOF files generated with 2.6 into a 2.4 instance.
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* 2.6 slaves can be attached to 2.4 masters, but not the contrary, and only
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for the time needed to perform the version upgrade.
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There are also a few API differences, that are unlikely to cause problems,
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but it is better to keep them in mind:
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* SORT now will refuse to sort in numerical mode elements that can't be parsed
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as numbers.
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* EXPIREs now all have millisecond resolution (but this is very unlikely to
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break code that was not conceived exploting the previous resolution error
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in some way.)
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* INFO output is a bit different now, and contains empty lines and comments
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starting with '#'. All the major clients should be already fixed to work
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with the new INFO format.
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Also the following redis.conf and CONFIG GET / SET parameters changed name:
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* hash-max-zipmap-entries, now replaced by hash-max-ziplist-entries
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* hash-max-zipmap-value, now replaced by hash-max-ziplist-value
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* glueoutputbuf was no completely removed as it does not make sense
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---------
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CHANGELOG
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---------
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What's new in Redis 2.6.0
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=========================
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UPGRADE URGENCY: We suggest new users to start with 2.6.0, and old users to
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upgrade after some testing of the application with the new
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Redis version.
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* Server side Lua scripting, see http://redis.io/commands/eval
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* Virtual Memory removed (was deprecated in 2.4)
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* Hardcoded limits about max number of clients removed.
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* AOF low level semantics is generally more sane, and especially when used
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in slaves.
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* Milliseconds resolution expires, also added new commands with milliseconds
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precision (PEXPIRE, PTTL, ...).
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* Clinets max output buffer soft and hard limits. You can specifiy different
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limits for different classes of clients (normal,pubsub,slave).
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* AOF is now able to rewrite aggregate data types using variadic commands,
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often producing an AOF that is faster to save, load, and is smaller in size.
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* Every redis.conf directive is now accepted as a command line option for the
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redis-server binary, with the same name and number of arguments.
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* Hash table seed randomization for protection against collisions attacks.
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* Performances improved when writing large objects to Redis.
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* Significant parts of the core refactored or rewritten. New internal APIs
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and core changes allowed to develop Redis Cluster on top of the new code,
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however for 2.6 all the cluster code was removed, and will be released with
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Redis 3.0 when it is more complete and stable.
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* Redis ASCII art logo added at startup.
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* Crash report on memory violation or failed asserts improved significantly
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to make debugging of hard to catch bugs simpler.
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* redis-benchmark improvements: ability to run selected tests,
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CSV output, faster, better help.
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* redis-cli improvements: --eval for comfortable development of Lua scripts.
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* SHUTDOWN now supports two optional arguments: "SAVE" and "NOSAVE".
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* INFO output split into sections, the command is now able to just show
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pecific sections.
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* New statistics about how many time a command was called, and how much
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execution time it used (INFO commandstats).
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* More predictable SORT behavior in edge cases.
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* INCRBYFLOAT and HINCRBYFLOAT commands.
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--------------------------------------------------------------------------------
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Credits: Where not specified the implementation and design are done by
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Salvatore Sanfilippo and Pieter Noordhuis. Thanks to VMware for making all
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this possible. Also many thanks to all the other contributors and the amazing
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community we have.
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See commit messages for more credits.
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Cheers,
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Salvatore
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