http://hadoop.apache.org/core/
http://en.wikipedia.org/wiki/List_of_file_systems
hadoop学习笔记
http://blog.csdn.net/heiyeshuwu/archive/2007/09/09/1778193.aspx
hadoop分布式文件系统
http://www.blogjava.net/killme2008/archive/2008/06/05/206043.html
MogileFS
http://www.danga.com/mogilefs/
MogileFS学习笔记
http://blog.chifeng.name/?p=220
How to setup MogileFS
http://durrett.net/mogilefs_setup.html
fastdfs
http://fastdfs.zhan.cn.yahoo.com/