To reclaim the space used by objects redundant between uffizi and banco, we need to have a process to remove objects.

I propose the following policy:

For all objects in the archiver database

1. ensure the object exists on azure; check its integrity
2. if storage space allows on ceph: ensure the object exists on ceph; check its integrity
3. ensure the object exists on its target striped storage; check its integrity
4. remove the object from the other striped storage

This will ensure that we have a redundancy of at least 2, ideally 3 copies for each content we remove.