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Elasticsearch之元数据(meta-fields)介绍 - 简书
source link: https://www.jianshu.com/p/74bcea1d4cbc?
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1. 什么是meta-fields 在Elasticsearch下，一个文档除了有数据之外，它还包含了元数据(Metadata)。每创建一条数据时，都会对元数据进行写入等操作，当然有些元数据是在创建mapping的时候就会设置, 它里面定义了每个添加的doc的处理方式。 类似于数据库的表结构数据。 2. 有哪些meta-fields ES中元数据大体分为五中类型：身份元数据、索引元数据、文档...
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