redis 协议

http://zhumeng8337797.blog.163.com/blog/static/100768914201121325157475/

http://wangnow.com/article/22-redis-protocol-specification-by-php

http://hi.baidu.com/yzbj0101/blog/item/e5e617da48274722960a1634.html

http://redis.io/topics/protocol