Multi-AZ deployment

Amazon Redshift supports multiple Availability Zones (Multi-AZ) deployments for provisioned RA3 clusters. By using Multi-AZ deployments, your Amazon Redshift data warehouse can continue operating in failure scenarios when an unexpected event happens in an Availability Zone. A Multi-AZ deployment deploys compute resources in two Availability Zones (AZs) and these compute resources can be accessed through a single endpoint. In the event of an entire Availability Zone failure, the remaining compute resources in the second Availability Zone are available to continue processing workloads. Amazon Redshift charges the same hourly compute rates for RA3 when running a Multi-AZ data warehouse. Storage costs remain the same as it is shared across all Availability Zones within and AWS Region.

Currently, Amazon Redshift supports zero Recovery Point Objective (RPO) that allows data to be current and up-to-date in the event of a failure. With Multi-AZ deployment, Amazon Redshift further enhances its existing recovery capabilities and reduces its Recovery Time Objective (RTO). This is possible because a Multi-AZ deployment can recover faster from a failure or disaster thereby elevating the Amazon Redshift Service Level Agreement (SLA) to 99.99% as compared to 99.9% with a Single-AZ data warehouse.