MongoDB Administrator's Guide

How to do it...

1. Connect to the mongos service and inspect the chunks:

sh.status()--- Sharding Status --- sharding version: { <-- output truncated -- > databases: { "_id" : "myShardedDB", "primary" : "shard0002", "partitioned" : true } myShardedDB.users shard key: { "age" : 1 } unique: false balancing: true chunks: shard0000 1 shard0001 1 shard0002 2 { "age" : { "$minKey" : 1 } } -->> { "age" : 18 } on : shard0000 Timestamp(2, 0) { "age" : 18 } -->> { "age" : 54 } on : shard0001 Timestamp(3, 0) { "age" : 54 } -->> { "age" : 73 } on : shard0002 Timestamp(3, 1) { "age" : 73 } -->> { "age" : { "$maxKey" : 1 } } on : shard0002 Timestamp(1, 4)

2. Disable the balancer:

sh.stopBalancer()

3. Select the admin database and split the chunk:

use admin ...