Elasticsearch: Th Definitive Guide learning Chapter 3 Data In, Data Out

银灯玉箫

于 2019-08-07 09:01:34 发布

阅读量159

点赞数

CC 4.0 BY-SA版权

分类专栏： Elasticsearch

本文链接：https://blog.youkuaiyun.com/lilele12211104/article/details/98626130

Elasticsearch 专栏收录该内容

26 篇文章

订阅专栏

本文深入探讨了Elasticsearch中文档的概念，解释了文档如何被序列化为JSON并存储于特定索引下。文章详细介绍了索引、类型以及文档ID自动生成等关键特性，并概述了文档检索、更新、创建、删除及批量操作的方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

What is a Document?

In Elasticsearch, document refers to the top-level, or root object that is serialized into JSON and stored in Elasticsearch under a unique ID.
在这里插入图片描述

_index

An index is like a database in a relational database; it’s the place we store and index related data. An index name must be lowercase, cannot begin with an underscore, and cannot ocntain commas.

_type

We use the same type for documents that represents the same class of thing, because they share the same data structure.
Every type has own mapping or schema definition, which defines the data structure for documents of that type., much like the columns in a database table.
在这里插入图片描述
Autogenerating IDs