分片与副本数创建索引指定分片与副本数创建索引时指定分片数和副本数，默认分片数1个，副本数1个分片数不可更改，副本数可

创建索引指定分片与副本数

PUT   http://192.168.94.151:9200/secisland/
{
  "settings": {
    "number_of_shards": 3,
    "number_of_replicas": 1
  }
}

返回值
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "secisland"
}

创建索引时指定分片数和副本数，默认分片数1个，副本数1个

分片数不可更改，副本数可更改

修改副本数

PUT http://192.168.94.151:9200/secisland/_settings/
{
  "number_of_replicas": 2
}