2.1 定义索引 ★★

示例

DELETE twitter

#定义索引，uri不带任何参数，不可以重复执行
PUT twitter

PUT twitter
{
    "settings" : {
        "index" : {
            "number_of_shards" : 3, 
            "number_of_replicas" : 2 
        }
    }
}

#这种写法不推荐
PUT twitter
{
    "settings": {
        "number_of_shards": 3,
        "number_of_replicas": 2
    }
}


#修改mapping的前提是已经有索引，可以重复执行
POST /twitter/_mapping
{
  "properties": {
    "brand":{
      "type": "keyword"
    },"price":{
      "type": "float"
    },"date":{
      "type": "date"
    }
  }
}

#修改settings的前提是已经有索引，可以重复执行
PUT /twitter/_settings
{
    "index" : {
        "refresh_interval" : "-1"
    }
}