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Kenneth Reitz
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120 lines
4.4 KiB
ReStructuredText
`|Redis Documentation| <index.html>`_
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**Redis\_2\_0\_0\_Changelog: Contents**
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`Redis 2.0: What's new? <#Redis%202.0:%20What's%20new?>`_
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`MULTI/EXEC <#MULTI/EXEC>`_
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`Blocking pop <#Blocking%20pop>`_
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`Publish/subscribe <#Publish/subscribe>`_
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`Hashes <#Hashes>`_
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`Virtual Memory <#Virtual%20Memory>`_
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`Contributors <#Contributors>`_
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`Special Thanks <#Special%20Thanks>`_
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`DOWNLOAD <#DOWNLOAD>`_
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Redis\_2\_0\_0\_Changelog
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=========================
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Redis 2.0: What's new?
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======================
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The release of Redis 2.0 marks a major milestone in Redis
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development. Apart from an endless list of new features, there are
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some major ones that deserve to be highlighted.
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It's worth to mention that while Redis 2.0.0 just reached its first
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stable release, Redis 2.2.0 is near to reach feature freeze, so ...
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be prepared for new exiting things in very short time!
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MULTI/EXEC
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~~~~~~~~~~
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The MULTI/EXEC family of commands were added to fulfill the need to
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execute multiple commands as a single atomic block. Because all
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commands inside a MULTI/EXEC block are serialized and executed
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sequentially, it is not possible that another client request is
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served in the middle of executing this block. All commands are
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executed one after the other when EXEC is called, which makes sure
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either **all** or **no** commands are executed, independent of the
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state of the client connection.
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More on MULTI/EXEC:
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- `http://code.google.com/p/redis/wiki/MultiExecCommand <http://code.google.com/p/redis/wiki/MultiExecCommand>`_
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Note that WATCH, a CAS (check and set) variant of MULTI/EXEC will
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be available on 2.2.0 and is not part of 2.0.0.
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Blocking pop
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~~~~~~~~~~~~
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The commands BLPOP and BRPOP were added to support popping from a
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list in a blocking fashion. This means the client connection will
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be blocked for a certain amount of time until another client pushes
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an item on a list. These commands are frequently used in
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producer/consumer scenarios.
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More on blocking pop:
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- `http://code.google.com/p/redis/wiki/BlpopCommand <http://code.google.com/p/redis/wiki/BlpopCommand>`_
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Publish/subscribe
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~~~~~~~~~~~~~~~~~
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The family of publish/subscribe commands let clients publish
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messages onto channels and subscribe to receive all messages that
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are published on channels. Also included are commands to receive
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all messages for which the channel matches a given pattern.
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More on publish/subscribe:
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- `http://code.google.com/p/redis/wiki/PublishSubscribe <http://code.google.com/p/redis/wiki/PublishSubscribe>`_
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- `http://antirez.com/post/redis-weekly-update-3-publish-submit.html <http://antirez.com/post/redis-weekly-update-3-publish-submit.html>`_
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- `http://rediscookbook.org/pubsub\_for\_asynchronous\_communication.html <http://rediscookbook.org/pubsub_for_asynchronous_communication.html>`_
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Hashes
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~~~~~~
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This new datatype allows to store multiple key/value pairs on a
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single key. Together with the list of regular commands you would
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expect for such a datatype (HSET, HGET, HDEL, HLEN, HKEYS, ...), it
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is also possible to use the values *inside* a hash for any SORT
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operation.
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More on hashes:
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- `http://code.google.com/p/redis/wiki/HsetCommand <http://code.google.com/p/redis/wiki/HsetCommand>`_
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- `http://antirez.com/post/redis-weekly-update-1.html <http://antirez.com/post/redis-weekly-update-1.html>`_
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Virtual Memory
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~~~~~~~~~~~~~~
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Redis Virtual Memory allows users to grow their dataset beyond the
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limits of their RAM.
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More on virtual memory:
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- `http://code.google.com/p/redis/wiki/VirtualMemoryUserGuide <http://code.google.com/p/redis/wiki/VirtualMemoryUserGuide>`_
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- `http://antirez.com/post/redis-virtual-memory-story.html <http://antirez.com/post/redis-virtual-memory-story.html>`_
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Contributors
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~~~~~~~~~~~~
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- Salvatore Sanfilippo
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- Pieter Noordhuis
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- Antonio Ognio
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- Alex McHale
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- Michel Martens
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- Damian Janowski
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- Bruno Deferrari
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- Ashley Martens
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- Derek Collison
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- Damian Janowski
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- Jeremy Zawodny
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- Konstantin Merenkov
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- Michel Martens
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- Sam Hendley
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Special Thanks
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~~~~~~~~~~~~~~
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Thanks to VMware sponsoring the work of Salvatore and Pieter, and
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the Redis community of users and client library developers. Redis
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2.0.0 was possible only thanks to your support.
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DOWNLOAD
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~~~~~~~~
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You can grab Redis 2.0.0 from
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`Google Code <http://code.google.com/p/redis/downloads/list>`_.
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It is also tagged on Git.
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.. |Redis Documentation| image:: redis.png |