Azure Site Recovery (ASR) is a native BCDR solution from Microsoft Azure. Using Azure Site Recovery you can set up and manage replication, failover, and failback from a single location in the Azure portal. Currently, ASR can be used for on-prem Physical or Virtual Machines, Azure VMs, or other cloud vendors as well.
Recently Microsoft announced Azure Site Recovery is now integrated with on-demand capacity reservation and available in public preview. With this integration, you can leverage the power of capacity reservations with Site Recovery to reserve compute capacity in the disaster recovery (DR) region and guarantee your failovers. When you assign a capacity reservation group (CRG) for your protected VMs, Site Recovery will failover the VMs to that CRG. Additionally, when on-demand capacity reservation reaches general availability, a compute SLA gets added to the existing Site Recovery’s Recovery Time Objective (RTO) SLA of 2 hours.
For new VMs, you can create and assign a CRG enabling replication. If you want to assign a CRG for your existing protected VMs, review the example in the screenshot below to navigate to the “Compute” blade and select the desired CRG. Assigning a CRG does not impact the Site Recovery License fee. For more information about the pricing of on-demand capacity reservations, refer the on-demand capacity reservations documentation.