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Kenneth Reitz
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6.9 KiB
ReStructuredText
154 lines
6.9 KiB
ReStructuredText
`|Redis Documentation| <index.html>`_
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**Redis\_1\_2\_0\_Changelog: Contents**
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`What's new in Redis 1.2 <#What's%20new%20in%20Redis%201.2>`_
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`New persistence mode: Append Only File <#New%20persistence%20mode:%20Append%20Only%20File>`_
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`New data type: sorted sets <#New%20data%20type:%20sorted%20sets>`_
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`Specialized integer objects encoding <#Specialized%20integer%20objects%20encoding>`_
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`MSET and MSETNX <#MSET%20and%20MSETNX>`_
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`Better Performances <#Better%20Performances>`_
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`Solaris Support <#Solaris%20Support>`_
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`Support for the new generation protocol <#Support%20for%20the%20new%20generation%20protocol>`_
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`A few new commands about already supported data types <#A%20few%20new%20commands%20about%20already%20supported%20data%20types>`_
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`Bug fixing <#Bug%20fixing>`_
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`CHANGELOG for Redis 1.1.90 <#CHANGELOG%20for%20Redis%201.1.90>`_
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Redis\_1\_2\_0\_Changelog
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=========================
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What's new in Redis 1.2
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=======================
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New persistence mode: Append Only File
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--------------------------------------
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The Append Only File is an alternative way to save your data in
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Redis that is fully durable! Unlike the snapshotting (default)
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persistence mode, where the database is saved asynchronously from
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time to time, the Append Only File saves every change ASAP in a
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text-only file that works like a journal. Redis will play back this
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file again at startup reloading the whole dataset back in memory.
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Redis Append Only File supports background Log compaction. For more
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info read the `Append Only File HOWTO <AppendOnlyFileHowto.html>`_.
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New data type: sorted sets
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--------------------------
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Sorted sets are collections of elements (like Sets) with an
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associated score (in the form of a double precision floating point
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number). Elements in a sorted set are taken in order, so for
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instance to take the greatest element is an O(1) operation.
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Insertion and deletion is O(log(N)). Sorted sets are implemented
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using a dual ported data structure consisting of an hash table and
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a skip list. For more information please read the
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`Introduction To Redis Data Types <IntroductionToRedisDataTypes.html>`_.
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Specialized integer objects encoding
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------------------------------------
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Redis 1.2 will use less memory than Redis 1.0 for values in
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Strings, Lists or Sets elements that happen to be representable as
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32 or 64 bit signed integers (it depends on your arch bits for the
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long C type). This is totally transparent form the point of view of
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the user, but will safe a lot of memory (30% less in datasets where
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there are many integers).
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MSET and MSETNX
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---------------
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That is, setting multiple keys in one command, atomically. For more
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information see the `MSET command <MsetCommand.html>`_ wiki page.
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Better Performances
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-------------------
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- 100x times faster SAVE and BGSAVE! There was a problem in the
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LZF lib configuration that is now resolved. The effect is this
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impressive speedup. Also the saving child will no longer use 100%
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of CPU.
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- Glue output buffer and writev(). Many commands producing large
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outputs, like LRANGE, will now be even 10 times faster, thanks to
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the new output buffer gluing algorithm and the (optional) use of
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writev(2) syscall.
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- Support for epool and kqueue / kevent. 10,000 clients
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scalability.
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- Much better EXPIRE support, now it's possible to work with very
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large sets of keys expiring in very short time without to incur in
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memory problems (the new algorithm expires keys in an adaptive way,
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so will get more aggressive if there are a lot of expiring keys)
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Solaris Support
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---------------
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Redis will now compile and work on Solaris without problems.
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Warning: the Solaris user base is very little, so Redis running on
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Solaris may not be as tested and stable as it is on Linux and Mac
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OS X.
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Support for the new generation protocol
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---------------------------------------
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- Redis is now able to accept commands in a new fully binary safe
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way: with the new protocol keys are binary safe, not only values,
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and there is no distinction between bulk commands and inline
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commands. This new protocol is currently used only for MSET and
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MSETNX but at some point it will hopefully replace the old one. See
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the Multi Bulk Commands section in the
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`Redis Protocol Specification <ProtocolSpecification.html>`_ for
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more information.
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A few new commands about already supported data types
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-----------------------------------------------------
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- `SRANDMEMBER <SrandmemberCommand.html>`_
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- The `SortCommand <SortCommand.html>`_ is now supprots the
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**STORE** and **GET #** forms, the first can be used to save sorted
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lists, sets or sorted sets into keys for caching. Check the manual
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page for more information about the **GET #** form.
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- The new `RPOPLPUSH command <RpoplpushCommand.html>`_ can do many
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interesting magics, and a few of this are documented in the wiki
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page of the command.
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Bug fixing
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----------
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Of course, many bugs are now fixed, and I bet, a few others
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introduced: this is how software works after all, so make sure to
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report issues in the Redis mailing list or in the Google Code
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issues tracker.
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Enjoy! antirez
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CHANGELOG for Redis 1.1.90
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==========================
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- 2009-09-10 in-memory specialized object encoding. (antirez)
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- 2009-09-17 maxmemory fixed in 64 systems for values > 4GB.
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(antirez)
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- 2009-10-07 multi-bulk protocol implemented. (antriez)
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- 2009-10-16 MSET and MSETNX commands implemented (antirez)
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- 2009-10-21 SRANDMEMBER added (antirez)
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- 2009-10-23 Fixed compilation in mac os x snow leopard when
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compiling a 32 bit binary. (antirez)
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- 2009-10-23 New data type: Sorted sets and Z-commands (antirez)
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- 2009-10-26 Solaris fixed (Alan Harder)
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- 2009-10-29 Fixed Issue a number of open issues (antirez)
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- 2009-10-30 New persistence mode: append only file (antirez)
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- 2009-11-01 SORT STORE option (antirez)
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- 2009-11-03 redis-cli now accepts a -r (repeat) switch. (antirez)
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- 2009-11-04 masterauth option merged (Anthony Lauzon)
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- 2009-11-04 redis-test is now a better Redis citizen, testing
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everything against DB 9 and 10 and only if this DBs are empty.
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(antirez)
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- 2009-11-10 Implemented a much better lazy expiring algorithm for
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EXPIRE (antirez)
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- 2009-11-11 RPUSHLPOP (antirez from an idea of @ezmobius)
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- 2009-11-12 Merge git://github.com/ianxm/redis (Can't remmber
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what this implements, sorry)
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- 2009-11-17 multi-bulk reply support for redis-bench, LRANGE
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speed tests (antirez)
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- 2009-11-17 support for writev implemented. (Stefano Barbato)
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- 2009-11-19 debug mode (-D) in redis-bench (antirez)
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- 2009-11-21 SORT GET # implemented (antirez)
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- 2009-11-23 ae.c made modular, with support for epoll. (antirez)
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- 2009-11-26 background append log rebuilding (antirez)
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- 2009-11-28 Added support for kqueue. (Harish Mallipeddi)
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- 2009-11-29 SORT support for sorted sets (antirez, thanks to
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@tobi for the idea)
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.. |Redis Documentation| image:: redis.png |