https://docs.aws.amazon.com/it_it/wellarchitected/latest/data-residency-hybrid-cloud-services-lens/drhcrel05-bp01.html
DRHCREL05-BP01 Provision spare compute capacity following an N+M model - Data Residency and Hybrid...
Provision spare compute capacity following an N+M availability model, where N is the required capacity and M is the spare capacity to accommodate server...