搜索技术了解

http://blog.csdn.net/hguisu/article/details/7962350 --倒排索引

http://blog.shop123.com/archives/544  --参考

http://www.aboutyun.com/thread-13680-1-1.html -- 学习笔记

https://www.zhihu.com/question/20180719 -知乎文章