[cinder][backup] backup big volumes leads to oom kill of cinder-backup

Stefan Hoffmann stefan.hoffmann at cloudandheat.com
Thu Oct 14 15:26:40 UTC 2021

Hi cinder team,

we have the issue, that doing backups of big volumes (5TB) fails and
cinder-backup get oom killed.
Looks like cinder-backup is allocating memory but didn't release it

Badly we are still using cinder queens. Is this a known issue and fixed
in newer releases or should I create a bug report?

We found a similar bug [1] with backup restore, that got fixed. I guess
something like this is also needed for backup create.

Thanks for you help

[1] https://bugs.launchpad.net/cinder/+bug/1865011

Stefan Hoffmann

Cloud&Heat Technologies GmbH
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