Add execution blocks

You add execution blocks to workflows in your Region switch plan, to perform the individual steps to complete failover or switchover for your application. For details about the functionality and behavior of each type of execution block, see the following descriptions.

Region switch runs a plan evaluation immediately after you create a plan or update it, and then every 30 minutes during steady state. Region switch stores information about plan evaluation in all the Regions where your plan is configured. Each execution block section here includes information about what is evaluated when Region switch runs plan evaluation.

Region switch includes execution block types that help scale compute resources as part of recovery. If you use these execution blocks in a plan, be aware that Region switch does not guarantee that the desired compute capacity with be attained. If you have a critical application and need to guarantee access to capacity, we recommend that you reserve the capacity. There are strategies that you can follow to reserve compute capacity in a secondary Region while also limiting cost. To learn more, see Pilot light with reserved capacity: How to optimize DR cost using On-Demand Capacity Reservations.

Region switch supports the following execution blocks.