缓存穿透、缓存穿透、缓存预热

http://mt.sohu.com/20160511/n448786204.shtml

http://www.cnblogs.com/luyulong/p/5448713.html

http://www.bubuko.com/infodetail-1063732.html

http://www.myexception.cn/internet/2024762.html