zookeeper使用和原理探究（一）
http://www.blogjava.net/BucketLi/archive/2010/12/21/341268.html
http://www.ibm.com/developerworks/cn/opensource/os-cn-zookeeper/
zookeeper getting started guide
http://zookeeper.apache.org/doc/current/zookeeperStarted.html
原文：http://my.oschina.net/chaxiang/blog/488350