概览：

页面缓存->页面片段缓存->数据缓存->分布式数据缓存

http://www.blogjava.net/BlueDavy/archive/2008/09/03/226749.html

http://blog.ureshika.com/archives/210.html

http://blog.ureshika.com/archives/661.html

Squid 设计与规划

http://oss.org.cn/ossdocs/column/chedong/cms.html

缓存的分类:http://blog.csdn.net/zhghost/article/details/5344962

http://blog.ureshika.com/archives/662.html