索引

创建索引
PUT /es_db

创建索引时可以设置分片数和副本数

PUT /es_db
{
  "settings" : {
    "number_of_shards" : 3,
    "number_of_replicas" : 2
  }
}

修改索引配置

PUT /es_db/_settings
{
  "index" : {
    "number_of_replicas" : 1
  }
}

查询索引
GET /es_db
es_db是否存在
HEAD /es_db

删除索引
DELETE /es_db