windows下安装memcached
http://www.codeforest.net/how-to-install-memcached-on-windows-machine
在windows下要启动多个memcached，需要注册多个服务，用到命令sc (sc命令每个选项=后面都要由空格哦)
http://blog.csdn.net/fzzsh/article/details/7473983
http://sysysy0924.blog.163.com/blog/static/17536244420123283532368/
分布式算法