其他

http://en.wikipedia.org/wiki/Maximum_Segment_Lifetime

http://blog.davidvassallo.me/2010/07/13/time_wait-and-port-reuse/

http://www.sizeofvoid.net/hadoop-2-0-namenode-ha-federation-practice-zh/

http://blog.csdn.net/kindy1022/article/details/7221118