Amazon Redshift, the most widely used data warehouse, now offers the ability to move an Amazon Redshift cluster to another AWS Availability Zone (AZ). The cluster relocation feature moves a cluster to another AZ in one step without requiring application changes. You can invoke the relocation function in cases where resource constraints in a given AZ are disrupting cluster operations such as the ability to resume or resize a cluster. This feature is available for use on clusters leveraging the RA3 instance family and is offered at no additional cost.
Source:: Amazon AWS