3 、elasticsearch的crud、批量操作

1、elasticsearch安装
2、elasticsearch概念
3 、elasticsearch的crud、批量操作
4、elasticsearch映射mapping
5、elasticsearch查询

CURD操作

#文档es的文档和索引CRUD操作

#索引初始化操作
#指定分片5个和副本的数量1个
#shards一旦设置不能修改

PUT lagou
{
  "settings": {
    "index":{
      "number_of_shards":5,
      "number_of_replicas":1
    }
  }
}

#获取所有索引
GET _all
#获取lagou索引
GET lagou

#获取某个索引的setting
GET lagou/_settings
#获取所有索引的setting
GET _all/_settings
GET _settings
#获取指定几个索引的setting
GET lagou,.kibana/_settings

#更新索引
PUT lagou/_settings
{
  "number_of_replicas": 2
}


#保存文档（index/type/id）
PUT lagou/job/1
{
  "title":"python分布式爬虫开发" ,
  "salary_min":15000 ,
  "city":"北京" ,
  "publish_date":"2018-08-02" ,
  "comments":15,
  "company":{
    "name":"百度",
    "company_addr":"北京市软件园"
  }
}

#POST保存文档（index/type/）id会自动生成uuid
POST /lagou/job/
{
  "title":"python django 开发工程师",
  "salary_min":30000,
  "city":"上海" ,
  "publish_date":"2018-07-12",
  "comments":20,
  "company":{
    "name":"美团科技",
    "company_addr":"上海市软件园A区"
  }
}

#获取指定字段
GET lagou/job/1?_source=title,city
 
#修改（全部修改）
PUT lagou/job/1
{
  "title":"python分布式爬虫开发1"
}

#增量修改
POST lagou/job/2/_update
{
  "doc":{
     "comments":10
  } 
}

#删除
DELETE lagou/job/1
DELETE lagou/job
DELETE lagou

批量操作

#批量获取
GET _mget
{
  "docs":[
    {
      "_index":"lagou",
      "_type":"job",
      "_id":"2"
    },{
      "_index":"lagou",
      "_type":"job1",
      "_id":"1"
    }
    ]
}

GET lagou/_mget
{
  "docs":[
      {
        "_type":"job",
        "_id":"2"
      },{
        "_type":"job1",
        "_id":"1"
      }
    ]
}

GET lagou/_mget
{
  "ids":[1,2]
}

bulk批量操作

批量导入可以合并多个操作、比如index，delete，update，create等。也可以将一个索引导入到另外一个索引

图片.png

POST _bulk
{"index":{"_index":"lagou","_type":"job","_id":"2"}}
{"title":"python分布式爬虫开发" ,"salary_min":15000 ,"city":"北京" ,"publish_date":"2018-08-02","comments":16,"company":{"name":"百度","company_addr":"北京市软件园2"}}
{"index":{"_index":"lagou","_type":"job1","_id":"1"}}
{"title":"python分布式爬虫开发" ,"salary_min":15000 ,"city":"北京" ,"publish_date":"2018-08-02","comments":16,"company":{"name":"百度","company_addr":"北京市软件园3"}}