超高性能 key-value 数据库 Redis

Redis 是一个高性能的key-value数据库。 redis的出现，很大程度补偿了memcached这类keyvalue存储的不足，在部 分场合可以对关系数据库起到很好的补充作用。它提供了Python，Ruby，Erlang，PHP客户端，使用很方便。

性能测试结果：

SET操作每秒钟 110000 次，GET操作每秒钟 81000 次，服务器配置如下：

Linux 2.6, Xeon X3320 2.5Ghz.

stackoverflow 网站使用 Redis 做为缓存服务器。

NoSQL Redis 2.8.3 发布，高性能KV数据库修正了3个Bug。主要是Sentinel集群模式和两个主从同步的Bug.完全改进：

--[ Redis 2.8.3 ] Release date: 11 Dec 2013

# UPGRADE URGENCY: MODERATE for Redis, HIGH for Sentinel.

* [FIX] Sentinel instance role sampling fixed, the system is now more
        reliable during failover and when reconfiguring instances with
        non matching configuration.
* [FIX] Inline requests are now handled even when terminated with just LF.
* [FIX] Replication timeout handling greatly improved, now the slave is able
        to ping the master while removing the old data from memory, and while
        loading the new RDB file. This avoid false timeouts sensed by
        masters.
* [FIX] Fixed a replication bug involving 32 bit instances and big datasets
        hard to compress that resulted into more than 2GB of RDB file sent.
* [FIX] Return error for inline requests with unbalanced quotes.
* [FIX] Publish the slave replication offset even when disconnected from the
        master if there is still a cached master instance.
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下载：http://download.redis.io/releases/redis-2.8.3.tar.gz