MOS上有好多文章，基本上都跑不了以下三点：

Setup can make a big difference

1. Network topology and load

2. NFS mount options(选择合适的挂载选项)

3. TCP configuration(配置合适的MTU,TCP window size,TCP congestion window sizes)

以下有个老外的写的文档，很全面。喜欢的拿去

http://download.csdn.net/detail/skybluehao/8925151