These are some of the requirements discussed for adoption.

1. External Ceph
2. Have workloads/instances.
3. Capture DB injection time
4. time taken by different steps.
5. Expected controlplane outage and rollback.
6. Time for controlplane adoption  

7. Time taken for dataplane (compute) adoption.

8. Resource consumption pattern before adoption.
9. Dataplane outage for provider & tenant network ?[Optional]
10. Scale-out after adoption?[Optional]