让网站飞起来02--服务器缓存技术

http://www.cnblogs.com/phphuaibei/archive/2011/09/27/2193548.html

http://blog.youkuaiyun.com/cschmin/article/details/5972239

http://www.cnblogs.com/jacklondon/archive/2010/12/07/1899312.html

不错的总结，记录下来~~