Hello,

I've been playing with backing up images from my production site
(running 0.87) to my backup site (running 0.87.1) using export/import
and export-diff/import-diff. After initially exporting and importing the
image (rbd/small to backup/small) I took a snapshot (called test1) on
the production cluster, ran export-diff from that snapshot, and then
attempted to import-diff the diff file on the backup cluster.

# rbd import-diff ./foo.diff backup/small
start snapshot 'test1' does not exist in the image, aborting
Importing image diff: 0% complete...failed.
rbd: import-diff failed: (22) Invalid argument

This works fine if I create a test1 snapshot on the backup cluster
before running import-diff. However, it appears that the changes get
written into backup/small not backup/small@test1. So unless I'm not
understanding something, it seems like the content of the snapshot on
the backup cluster is of no importance, which makes me wonder why it
must exist at all.

Any thoughts? Thanks!

-Steve

-- 
Steve Anthony
LTS HPC Support Specialist
Lehigh University
sma...@lehigh.edu


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