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FS1360472174 avatar FS1360472174 commented on August 29, 2024

  1. 数据库存储的一般是结构化、半结构化等数据

  2. 数据库索引是对字段的重排序
    但是对于like "%dsaf%" 这样的模糊查询数据库索引是起不了作用的

  3. ES 做的事就是建立一个反向索引机制，将数据关键词抽取，然后进行索引排序

from elasticsearchlearning.

FS1360472174 avatar FS1360472174 commented on August 29, 2024

ES 本身也可以作为NoSQL数据库，schema-free 原因在于

  1. 默认在索引中保存原始数据，并可获取(Lucene 的store功能)

  2. 有translog，不会丢数据

http://jolestar.com/elasticsearch-architecture/

from elasticsearchlearning.

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