全文搜索引擎 Elasticsearch 入门教程： http://www.ruanyifeng.com/blog/2017/08/elasticsearch.html
Elasticsearch基础教程： https://blog.csdn.net/cnweike/article/details/33736429
Elasticsearch就这么简单：https://segmentfault.com/a/1190000013929434
ElasticSearch的工作机制：https://www.tuicool.com/articles/mq6J7v
《深入理解Elasticsearch（原书第2版）》——导读:https://yq.aliyun.com/articles/120395?spm=a2c4e.11153940.blogcont109533.18.1ddc6923HFka1d
Elasticsearch的工作流程《深入理解Elasticsearch（原书第2版）》： https://yq.aliyun.com/articles/109533?t=t1
REST API：https://blog.csdn.net/px01ih8/article/details/78674685
Elasticsearch并发冲突问题(乐观锁): https://www.jianshu.com/p/7a3652bae8a4
csdn nlog:https://blog.csdn.net/r_p_j/article/category/7255500
全文索引原理介绍:https://blog.csdn.net/softmanfly/article/details/51376886
面试：
1. http://ginobefunny.com/post/elasticsearch_interview_questions/?hmsr=toutiao.io&utm_medium=toutiao.io&utm_source=toutiao.io
2. https://blog.csdn.net/lby0307/article/details/79677803
