Mongodb initialization

1, Create users and instances
use test
db.createUser({user:'test',pwd:'xxx',roles:[{role:"dbOwner",db:"test"}],passwordDigestor:"server"})
db.grantRolesToUser("test",[{role:"dbOwner",db:"test"}])

2, Create set
db.createCollection("test")

3, Enable sharding
use admin
db.runCommand({enableSharding:"test"})

4, Fragment the set
sh.shardCollection("testdb.test",{"_id":1})

5, View set fragment
db.getCollection("test").getShardDistribution();

6, Look at the index
db.test.getIndexes()

7, Create index
db.test.createIndex({"id":1,"name":1},{backgroud:1})