es

http://www.ruanyifeng.com/blog/2017/08/elasticsearch.html

初步使用：
https://blog.csdn.net/qq_43792385/article/details/92070603
https://www.cnblogs.com/coffee-boy/p/9584846.html
集群 https://www.cnblogs.com/coffee-boy/p/9586061.html

查看当前节点的所有 Index。
curl -X GET "http://localhost:9200/_cat/indices?v"

IK分词器，下载编译安装：
https://blog.csdn.net/u010504064/article/details/70214040
linux RPM安装的https://blog.csdn.net/vkingnew/article/details/85241656
直接下载别人编译的 https://github.com/medcl/elasticsearch-analysis-ik/releases/tag/v6.5.4