Comment 34 for bug 1578036

Hi Jason,

PDB clearly shows this is not related to version of export-diff/import-diff. The ceph.py is trying to export-diff a snapshot made against the snapshot against the original volume, but backup manager.py passes the snap-clone of the original volume for the snapshot and hence export-diff can't find the actual snapshot.

As the finding from "Gaudenz" in post #16, there is a mix-up in ceph.py which has not been addressed. This leads to failure of the incremental (ceph differential) and forces a full backup against the original volume (chuck by chunk), which is mostly not a valid backup for an "in-use" volume given that it is not crash consistent.