Why can't I change the maintenance track for my Amazon Redshift provisioned cluster?

Resolution

To control the cluster version that Amazon Redshift applies during the maintenance window, you can choose the maintenance track. However, you can't change the maintenance track in the following situations.

The provisioned cluster requires a hardware upgrade, or Amazon Redshift must replace a node

Each version change can include updates to the operating system (OS), security, and functionality. Amazon Redshift automatically starts maintenance when there's a hardware update and you set the cluster maintenance track Current.

The provisioned cluster requires mandatory upgrades or patches

Amazon Redshift deploys mandatory upgrades or patches for a specific provisioned cluster or for all provisioned clusters in an AWS Region. 

Amazon Redshift requires at least a 30-minute window in your instance's weekly schedule to confirm that all instances have the latest patches and upgrades. During the maintenance window, Amazon Redshift performs tasks on clusters and instances. For the security and stability of your data, maintenance can cause instances to be unavailable.

Note: When your provisioned cluster requires a mandatory maintenance window, AWS sends a notification before the start of the maintenance window.

You can't set the maintenance track to Trailing with the latest cluster version

If you don't change your maintenance track to Trailing, then your cluster already uses the latest approved cluster version. You must wait until the next new release becomes available for the current version to trail.

After Amazon Redshift releases a new cluster version, you can change your cluster's maintenance track to Trailing to remain in Trailing for future maintenance. 

You can't change a restored provisioned cluster to another Preview track

If you restore a new provisioned cluster from a snapshot of an older provisioned cluster that used the Preview track, then the following happens:

• The restored provisioned cluster inherits the source cluster's maintenance track.
• You can't change the restored provisioned cluster to another Preview track.

You can't change a cluster from Preview track to another

You can't change a cluster from one Preview track to another Preview track. You also can't change a cluster from a Preview track to Current or Trailing track or a cluster from Current or Trailing to Preview.

Related information

Cluster maintenance

Deferring maintenance

Synchronize and control your Amazon Redshift clusters maintenance windows

Why didn't Amazon Redshift perform any upgrades during the maintenance window?