Milestone 1:
- define the infrastructure to initiate a pool upgrade including
  - dmg interface
  - versioning scheme with new associated pool properties
  - revoke open handle and check that no rebuild/reint/extend in progress
  - restart after shutdown/failure
- new container created in a pool with a old version should not enable the new features.
- manage upgrade from 2.0 to 2.2
  - add new pool/container properties added between 2.0 and 2.2
- downgrading the DAOS software of an upgraded pool report a proper RAS error.
Milestone 2:
- address use case for data migration between 2.2 and 2.4 with the EC placement change.
- add metrics to report progress

Gantt Chart

Provide Gantt chart for each milestone.

References (optional)

External papers, web page (if any)

Known issues and future works that was considered out-of-scope.