A key motivation for adopting public clouds is the capabilities that they provide, like geographic redundancy and compute bursting. Compute bursting is a functionality that on-premises applications can use when they run out of resources or capacity; it enables them to offload to the cloud when demand increases or a failure arises.

AWS provides several building blocks for disaster recovery operations by leveraging low costs and operations. In this chapter, we will discuss the three main models that users can adapt to increase their business continuity.

The following topics will be covered in this chapter:

• Availability metrics
• Backup and restore
• Pilot light
• Warm standby
• Multi-site active-active