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

# 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 _settingsGET .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

# 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