sh.balancerCollectionStatus()¶

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Definition
Syntax
Access Control
Example

Definition¶

sh.balancerCollectionStatus(namespace)¶

New in version 4.4.

Returns a document that contains information about whether the chunks of a sharded collection are balanced (i.e. do not need to be moved) as of the time the command is run or need to be moved because of draining shards, zone violation or imbalance of chunks across shards.

The mongo shell method sh.balancerCollectionStatus() wraps the balancerCollectionStatus command.

Syntax¶

The sh.balancerCollectionStatus has the following form:

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sh.balancerCollectionStatus( <namespace> )

Parameter¶

The sh.balancerCollectionStatus() method takes the following parameter:

Parameter	Type	Description
namespace	String	The of the collection to shard in the form `"<database>.<collection>"`.

Access Control¶

When running with access control, the user must have the enableSharding privilege actions on database and/or collection to run the method. That is, a user must have a role that grants the following privilege:

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{ resource: { db: <database>, collection: <collection> }, actions: [ "enableSharding" ] }

The built-in clusterManager role provides the appropriate privileges.

Example¶

To check whether the chunks of a sharded collection test.contacts is currently in balance, connect to a mongos instance and issue the following:

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sh.balancerCollectionStatus("test.contacts")

If the chunks for the collection do not need to be moved, the method returns an output similar to the following:

{
   "balancerCompliant" : true,
   "ok" : 1,
   "operationTime" : Timestamp(1583193238, 1),
   "$clusterTime" : {
      "clusterTime" : Timestamp(1583193238, 1),
      "signature" : {
         "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
         "keyId" : NumberLong(0)
      }
   }
}

For the description of the output, see balancerCollectionStatus Output.

← sh.addTagRange() sh.disableBalancing() →