elasticsearch常用命令

llf_cloud2023-10-17 12:58

Elasticsearch概念

Elasticsearch	mysql
Index(索引)	数据库
Type(类型)	表
Documents(文档)	行
Fields	列

常用命令

索引

bash 复制代码

# 索引初始化，number_of_shards:分片数，不可修改；number_of_replicas:副本数，可修改
PUT lagou
{
  "settings": {
    "index": {
      "number_of_shards": 5,
      "number_of_replicas": 1
    }
  }
}

# 获取索引settings
GET lagou/_settings
GET _all/_settings
GET _settings

GET .kibana,lagou/_settings

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


# 获取索引信息
GET _all
GET lagou

CRUD

bash 复制代码

# 新建
# 新建数据，指定id
PUT lagou/job/1
{
    "title": "python分布式爬虫",
    "salary_min":15000,
    "city":"北京",
    "company":{
        "name":"百度",
        "company_addr":"北京市软件园"
    },
    "publish_date": "2017-4-16",
    "comments":15
}

# 新建数据
POST lagou/job/
{
    "title": "python分布式爬虫",
    "salary_min":15000,
    "city":"北京",
    "company":{
        "name":"百度",
        "company_addr":"北京市软件园"
    },
    "publish_date": "2017-4-16",
    "comments":15
}


# 查询
GET lagou/job/1
# 只获取title字段
GET lagou/job/1?_source=title
# 获取title，city字段
GET lagou/job/1?_source=title,city
# 获取所有字段
GET lagou/job/1?_source


# 修改
# 覆盖更新
PUT lagou/job/1
{
    "title":"python分布式爬虫",
    "salary_min":15000,
    "company":{
        "name":"百度",
        "company_addr":"北京市软件园"
    },
    "publish_date": "2017-4-16",
    "comments":15
}

# 更新指定字段
POST lagou/job/1/_update
{
  "doc":{
    "comments":20
  }
}


# 删除
# 删除文档
DELETE lagou/job/1
# 删除索引
DELETE lagou