edis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）和zset（有序集合）。-Redis is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets a

开源的no-sql的数据库redis的2.6.13版本中，修改了intset的代码，增加了降级功能，可以减少内存的消耗。-Open source no-sql database redis the 2.6.13 version, modified intset code, increasing the degradation function, you can reduce memory consumption.