Redis

1. http://zh.wikipedia.org/wiki/Redis
2. Redis是一个开源、支持网络、基于内存、键值对存储数据库，使用ANSI C编写。其开发由VMware主持。根据月度排行网站DB-Engines.com的数据显示，Redis是最流行的键值对存储数据库。
3. http://redis.io/
4. Redis uses a standard practice for its versioning: major.minor.patchlevel. An even minor marks a stable release: 1.2, 2.0, 2.2, 2.4, 2.6. Odd minors are used for unstable releases: 2.7.x were the unstable versions that became 2.8 once stable.

5. $ wget http://download.redis.io/releases/redis-2.6.16.tar.gz
   $ tar xzf redis-2.6.16.tar.gz
   $ cd redis-2.6.16
   $ make

6. $ src/redis-server

7. $ src/redis-cli
   redis> set foo bar
   OK
   redis> get foo
   "bar"

8. http://redis.io/commands
9. http://try.redis.io/