# ParallelismConfiguration
<a name="API_ParallelismConfiguration"></a>

Describes parameters for how a Managed Service for Apache Flink application executes multiple tasks simultaneously. For more information about parallelism, see [Parallel Execution](https://nightlies.apache.org/flink/flink-docs-release-1.20/dev/parallel.html) in the [Apache Flink Documentation](https://nightlies.apache.org/flink/flink-docs-release-1.20/).

## Contents
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 ** ConfigurationType **   <a name="APIReference-Type-ParallelismConfiguration-ConfigurationType"></a>
Describes whether the application uses the default parallelism for the Managed Service for Apache Flink service. You must set this property to `CUSTOM` in order to change your application's `AutoScalingEnabled`, `Parallelism`, or `ParallelismPerKPU` properties.  
Type: String  
Valid Values: `DEFAULT | CUSTOM`   
Required: Yes

 ** AutoScalingEnabled **   <a name="APIReference-Type-ParallelismConfiguration-AutoScalingEnabled"></a>
Describes whether the Managed Service for Apache Flink service can increase the parallelism of the application in response to increased throughput.  
Type: Boolean  
Required: No

 ** Parallelism **   <a name="APIReference-Type-ParallelismConfiguration-Parallelism"></a>
Describes the initial number of parallel tasks that a Managed Service for Apache Flink application can perform. If `AutoScalingEnabled` is set to True, Managed Service for Apache Flink increases the `CurrentParallelism` value in response to application load. The service can increase the `CurrentParallelism` value up to the maximum parallelism, which is `ParalellismPerKPU` times the maximum KPUs for the application. The maximum KPUs for an application is 64 by default, and can be increased by requesting a limit increase. If application load is reduced, the service can reduce the `CurrentParallelism` value down to the `Parallelism` setting.  
Type: Integer  
Valid Range: Minimum value of 1.  
Required: No

 ** ParallelismPerKPU **   <a name="APIReference-Type-ParallelismConfiguration-ParallelismPerKPU"></a>
Describes the number of parallel tasks that a Managed Service for Apache Flink application can perform per Kinesis Processing Unit (KPU) used by the application. For more information about KPUs, see [Amazon Managed Service for Apache Flink Pricing](http://aws.amazon.com/kinesis/data-analytics/pricing/).  
Type: Integer  
Valid Range: Minimum value of 1.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/kinesisanalyticsv2-2018-05-23/ParallelismConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/kinesisanalyticsv2-2018-05-23/ParallelismConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/kinesisanalyticsv2-2018-05-23/ParallelismConfiguration)