use admindb.grantRolesToUser(
"zhanglu",
[
{ role: "clusterAdmin", db: "admin" }
]
);注:需要先创建唯一索引,不然直接创建片键会报错
sh.shardCollection("zhanglu.test.dev_his_value", { mineCode : 1,deviceNo : 1,realTime:1 } ,true)db.getCollection("cmss.dev_his_value").stats()