Ceph

We need to find out whether Amazon allows the object Owner to be changed by a setacl operation.

Actually, it breaks down to two questions:
1) Does Amazon allow the Owner to be changed to another user controlled by the same Account?
2) Does Amazon allow the Owner to be changed to an arbitrary user.

This is tied in with billing. For example, if users are charged for how much data they're storing, I can increase someone's bill by giving a lot of objects to him. This may be safe if all the users are owned by the same account (and so all their bills go to the same place), but what about arbitrary users?

I will see if I can give away an object to an arbitrary user. Then we should create another user under the usual billing account and see if the behavior is different for users who are "related". Then we need to make sure rgw is doing the right thing.