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。
2013-02-11 发布2.6.10。上个版本是2013-01-16的2.6.9 。此版本修正很多小Bug以及一些小增强改进。2.4遗留产品是2.4.18。
--[ Redis 2.6.10 ] UPGRADE URGENCY: MODERATE, this release contains many non-critical fixes and many small improvements. * [BUGFIX] redis-cli --rdb, fixed when the server sends newlines to ping. * [BUGFIX] redis-cli, minor fixes on connection handling, prompt. * [BUGFIX] Slow log: don't log EXEC, just executed commands. * [BUGFIX] On failed shutdown don't try again and again compulsively. * [BUGFIX] Fix build on sunos without backtrace(). * [BUGFIX] UNSUBSCRIBE and PUNSUBSCRIBE: always provide a reply (see 742e580) * [BUGFIX] Lua struct library was broken, upgraded. * [BUGFIX] Fix a bug in srandmemberWithCountCommand() with count argument. * [BUGFIX] Test: disable clients timeout to prevent issues on slow systems. * [BUGFIX] Sentinel: don't advertise the promoted slave as master too early. * [IMPROVED] Whitelist SIGUSR1, see http://redis.io/topics/signals. * [IMPROVED] Simpler to understand redis-cli --bigkeys output. * [IMPROVED] Test now works with tclsh > 8.5. * [IMPROVED] Added option to turn of the Nagle algorithm in slave socket. * [IMPROVED] Optionally use SO_KEEPALIVE to detect dead peers.