# AWS Parallel Computing Service endpoints and quotas
<a name="pcs"></a>

The following tables describe the service endpoints and service quotas for AWS Parallel Computing Service. Service quotas, also referred to as *limits*, are the maximum number of service resources or operations for your AWS account. For more information, see [AWS service quotas](aws_service_limits.md).

## Service endpoints
<a name="pcs_region"></a>

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/general/latest/gr/pcs.html)

## Service quotas
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[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/general/latest/gr/pcs.html)

## Internal quotas
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The following quotas are internal and non-adjustable.


|  **Name**  |  **Default**  |  **Adjustable**  |  **Description**  | 
| --- | --- | --- | --- | 
|  Concurrent cluster creation  | 1 | No |  The maximum number of clusters in the `Creating` state per AWS Region.  | 

## Relevant quotas for other AWS services
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AWS PCS uses other AWS services. Your service quotas for those services impact your use of AWS PCS.

**Amazon EC2 service quotas that impact AWS PCS**
+ Spot instance requests
+ Running on-demand instances
+ Launch templates
+ Launch template versions
+ Amazon EC2 API requests

For more information, see [Amazon EC2 endpoints and quotas](ec2-service.md).