redis是一个key-value存储系统。和Memcached类似，它支持存储的value类型相对更多，包括string(字符串)、 list(链表)、set(集合)、zset(sorted set –有序集合)和hash（哈希类型）。这些数据类型都支持push/pop、add/remove及取交集并集和差集及更丰富的操作，而且这些操作都是原 子性的。在此基础上，redis支持各种不同方式的排序。与memcached一样，为了保证效率，数据都是缓存在内存中。区别的是redis会周期性的 把更新的数据写入磁盘或者把修改操作写入追加的记录文件，并且在此基础上实现了master-slave(主从)同步。Redis一般部署在linux服 务器上，但是我们也可以在windows上学习他的安装和配置。-redis is a key-value storage system. And Memcached Similarly, it supports value type of storage is relatively more, including string (string), list (list), set (set), zset (sorted set- ordered sets) and hash (hash type). These data types are supported push/pop, add/remove and take the intersection of union and difference operations and richer, and these operations are atomic. On this basis, redis support a variety of different ways of sorting. Like with memcached, in order to ensure efficiency, data is cached in memory. Redis difference is periodically updated data written to disk or to write the modified operating additional log files, and on this basis to achieve a master-slave (master-slave) synchronization. Redis ships deployed on the linux server, but we can also learn　his installation and configuration on the windows.