Elasticsearch初探

时间：2022-10-30 06:11:12
  •  elasticsearch中的概念同传统数据库的类比如下：

Relational DB -> Databases -> Tables -> Rows -> Columns
Elasticsearch -> Indices -> Types -> Documents -> Fields

关系数据库     ⇒ 数据库 ⇒ 表    ⇒ 行    ⇒ 列(Columns)

Elasticsearch  ⇒ 索引   ⇒ 类型  ⇒ 文档  ⇒ 字段(Fields)
  • 导入数据API：
curl -XPOST 'http://localhost:9200/prd/xjb3/_bulk' --data-binary @last.json

 

  • last.json文件里面的数据格式形如：<数据地址：http://files.cnblogs.com/files/kevin-yuan/elasticsearchJsonData.zip>
{"index":{"_id":"1"}}

{"account_number":1,"balance":39225,"firstname":"Amber","lastname":"Duke","age":32,"gender":"M","address":"880 Holmes Lane","employer":"Pyrami","email":"amberduke@pyrami.com","city":"Brogan","state":"IL"}

{"index":{"_id":"6"}}

{"account_number":6,"balance":5686,"firstname":"Hattie","lastname":"Bond","age":36,"gender":"M","address":"671 Bristol Street","employer":"Netagy","email":"hattiebond@netagy.com","city":"Dante","state":"TN"}

{"index":{"_id":"13"}}

{"account_number":13,"balance":32838,"firstname":"Nanette","lastname":"Bates","age":28,"gender":"F","address":"789 Madison Street","employer":"Quility","email":"nanettebates@quility.com","city":"Nogal","state":"VA"}
  • 排序查询API：
http://localhost:9200/prd/xjb3/_search?sort=balance:desc
  • 指定返回条数：加上size=N即可
http://localhost:9200/prd/xjb3/_search?sort=amount:desc&size=100

资料：

[1] http://learnes.net/index.html  文档github地址：https://github.com/GavinFoo/elasticsearch-definitive-guide

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