My use case was a small FlexPod architecture (seven Cisco B-Series Blades, a FAS8200 in CDOT, two Cisco Nexus switches). One rack. We used Cisco 3xxx switches. Six profiles were defined so six blades were running and one was a spare.
On top of the infrastructure we used Oracle Hypervisor (OVM); the VMs were based on Oracle Linux. On top the virtual machines we hosted Oracle Database (pinned, to reduce license costs) or applications.
So two levels of flexibility per DR were activated: one based on profiles and one based on the hypervisor.