You mean the image is in use while you’re exporting? Have thought
about creating snapshots and exporting those? Or set up rbd mirroring?
Zitat von Tony Liu <tonyliu0592@xxxxxxxxxxx>:
To update, hanging happens when updating local image, not remote, networking
is not a concern here. Any advices how to look into it?
Thanks!
Tony
________________________________________
From: Tony Liu <tonyliu0592@xxxxxxxxxxx>
Sent: August 26, 2023 10:43 PM
To: dev@xxxxxxx; ceph-users@xxxxxxx
Subject: rbd export-diff/import-diff hangs
Hi,
I'm using rbd import and export to copy image from one cluster to another.
Also using import-diff and export-diff to update image in remote cluster.
For example, "rbd --cluster local export-diff ... | rbd --cluster
remote import-diff ...".
Sometimes, the whole command is stuck. I can't tell it's stuck on
which end of the pipe.
I did some search, [1] seems the same issue and [2] is also related.
Wonder if there is any way to identify where it's stuck and get more
debugging info.
Given [2], I'd suspect the import-diff is stuck, cause rbd client is
importing to the
remote cluster. Networking latency could be involved here? Ping
latency is 7~8 ms.
Any comments is appreciated!
[1] https://bugs.launchpad.net/cinder/+bug/2031897
[2] https://stackoverflow.com/questions/69858763/ceph-rbd-import-hangs
Thanks!
Tony
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