# DecreaseNodeGroupsInGlobalReplicationGroup
<a name="API_DecreaseNodeGroupsInGlobalReplicationGroup"></a>

Decreases the number of node groups in a Global datastore

## Request Parameters
<a name="API_DecreaseNodeGroupsInGlobalReplicationGroup_RequestParameters"></a>

 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 ** ApplyImmediately **   
Indicates that the shard reconfiguration process begins immediately. At present, the only permitted value for this parameter is true.   
Type: Boolean  
Required: Yes

 ** GlobalReplicationGroupId **   
The name of the Global datastore  
Type: String  
Required: Yes

 ** NodeGroupCount **   
The number of node groups (shards) that results from the modification of the shard configuration  
Type: Integer  
Required: Yes

 **GlobalNodeGroupsToRemove.GlobalNodeGroupId.N**   
If the value of NodeGroupCount is less than the current number of node groups (shards), then either NodeGroupsToRemove or NodeGroupsToRetain is required. GlobalNodeGroupsToRemove is a list of NodeGroupIds to remove from the cluster. ElastiCache will attempt to remove all node groups listed by GlobalNodeGroupsToRemove from the cluster.   
Type: Array of strings  
Required: No

 **GlobalNodeGroupsToRetain.GlobalNodeGroupId.N**   
If the value of NodeGroupCount is less than the current number of node groups (shards), then either NodeGroupsToRemove or NodeGroupsToRetain is required. GlobalNodeGroupsToRetain is a list of NodeGroupIds to retain from the cluster. ElastiCache will attempt to retain all node groups listed by GlobalNodeGroupsToRetain from the cluster.   
Type: Array of strings  
Required: No

## Response Elements
<a name="API_DecreaseNodeGroupsInGlobalReplicationGroup_ResponseElements"></a>

The following element is returned by the service.

 ** GlobalReplicationGroup **   
Consists of a primary cluster that accepts writes and an associated secondary cluster that resides in a different Amazon region. The secondary cluster accepts only reads. The primary cluster automatically replicates updates to the secondary cluster.  
+ The **GlobalReplicationGroupIdSuffix** represents the name of the Global datastore, which is what you use to associate a secondary cluster.
Type: [GlobalReplicationGroup](API_GlobalReplicationGroup.md) object

## Errors
<a name="API_DecreaseNodeGroupsInGlobalReplicationGroup_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** GlobalReplicationGroupNotFoundFault **   
The Global datastore does not exist  
HTTP Status Code: 404

 ** InvalidGlobalReplicationGroupState **   
The Global datastore is not available or in primary-only state.  
HTTP Status Code: 400

 ** InvalidParameterCombination **   
Two or more incompatible parameters were specified.    
 ** message **   
Two or more parameters that must not be used together were used together.
HTTP Status Code: 400

 ** InvalidParameterValue **   
The value for a parameter is invalid.    
 ** message **   
A parameter value is invalid.
HTTP Status Code: 400

## See Also
<a name="API_DecreaseNodeGroupsInGlobalReplicationGroup_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticache-2015-02-02/DecreaseNodeGroupsInGlobalReplicationGroup)