1 Chubby
http://blog.csdn.net/historyasamirror/article/details/3870168
2 BigTable
http://thecloud.iteye.com/blog/1918999
http://blog.csdn.net/opennaive/article/details/7532589
3 GFS
http://blog.csdn.net/shinehoo/article/details/5872436
4 SSTable