Ceph » rbd

Can you please add the following to your ceph.conf, re-run the failed 'rbd export-diff', and attach the resulting log? I have a theory as to the cause but I will need the logs to verify. Thanks.

ceph.conf

[client]
debug rados = 20
debug rbd = 20
log file = /path/to/log/file/$name.$pid.log

Here you go. Had to compress it to avoid "request entity too large".

Thanks for the prompt reply, your logs confirmed my suspicion. For a short-term workaround until the fix propagates down to Hammer, you should create a snapshot on AlignNav-db, run a regular 'rbd export AlignNav-db@<base snap>', then you should be able to run 'rbd export diff --from-snap AlignNav-db@<base snap> AlignNav-db@<incremental snap>' to acquire your incremental diffs.