http://blog.****.net/cywosp/article/details/23397179/
http://www.codeproject.com/Articles/56138/Consistent-hashing
http://www.cnblogs.com/daizhj/archive/2010/08/24/1807324.html
http://www.tuicool.com/articles/2ueyYf 一致性Hash算法在Redis的使用
http://blog.jobbole.com/80334/ http://blog.zheezes.com/consistent-hashing-algorithm-design-principles.html 一致性哈希算法原理设计