# Auto-scaling for Amazon DynamoDB

Auto-scaling enhances efficiency and performance, especially for large-scale operations, by dynamically deploying access nodes in a region only when required, and then promptly powering off and decommissioning the access nodes after they are used.

## Supported AWS regions

Auto-scaling is supported for all commercial AWS Regions. Edge locations (such as GovCloud, AWS Outposts, Local Zones, and Wavelength Zones) are not supported.

## How auto-scaling works with Amazon DynamoDB

Auto-scaling is managed by a scale configuration that is associated with a Server group. The server group, in turn, is associated with a workload resource pool in a specific AWS region. Based on the workload demand, Commvault automatically provisions the required access nodes from this resource pool to efficiently support DynamoDB backup and restore operations.

## Where auto-scaled access nodes are created

Auto-scaled access nodes are created in the AWS regions and availability zones that you specify in the scale configuration configuration. The access nodes are deployed in the same region where your S3 buckets reside to optimize data transfer performance and minimize cross-region data transfer costs.

### Decommissioning of access nodes

Auto-scaled access nodes shut down after they are idle for 5 minutes. If an access node is shut down when a job request is initiated, then the access node is powered on and used. If no activity occurs on that access node after the job completes, then the access node is deleted.

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