DWS supports the evolution from single-AZ deployment to multi-AZ deployment on the management plane to provide high reliability. By deploying Data Warehose Service (DWS) across multiple availability zones, businesses can ensure high availability and achieve disaster recovery more effectively, as opposed to relying on a single zone deployment, which can leave them vulnerable to outages and data loss in the event of a disaster, thereby minimizing downtime and ensuring continuous operation.
Further information can be found in the Data Warehouse Service(DWS) area of the Help Centers.