http://programmers.stackexchange.com/questions/49550/which-hashing-algorithm-is-best-for-uniqueness-and-speed/145633#145633

http://redis.io/topics/memory-optimization

http://redisplanet.com/redis/under-the-hood-of-redis-hash-part-2-and-list/

http://redisplanet.com/redis/under-the-hood-of-redis-hash-part-1/

https://github.com/sripathikrishnan/redis-rdb-tools/wiki/Redis-Memory-Optimization

http://openmymind.net/Back-To-Basics-Hashtables/

http://openmymind.net/Back-To-Basics-Hasthables-Part-2/

http://redisplanet.com/redis/under-the-hood-of-redis-hash-part-1/

http://redisplanet.com/redis/under-the-hood-of-redis-hash-part-2-and-list/

Redis 源码解析