Reference
- Elasticsearch保持与关系型数据库的同步
How to keep Elasticsearch synchronized with a relational database using Logstash and JDBC - Elasticsearch 官方参考
Elasticsearch Reference - 搜索结果按相关度排序，如何控制相关度函数
Controlling relevance - 知乎总结
该怎么学elasticsearch？
携程酒店订单Elastic Search实战