It's export-diff from an in-use image, both from-snapshot and to-snapshot exist. The same from-snapshot exists in import image, which is the to-snapshot from last diff. export/import is used for local backup, rbd-mirroring is used for remote backup. Looking for options to get more info to troubleshoot. Thanks! Tony ________________________________________ From: Eugen Block <eblock@xxxxxx> Sent: August 27, 2023 11:53 AM To: ceph-users@xxxxxxx Subject: Re: rbd export-diff/import-diff hangs 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 > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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