cinder/releasenotes/notes/backup-sparse-f396b35bfe17332e.yaml
Pete Zaitcev b75c29c7d8 Restore into sparse volumes
We take the approach to detect zero data when restoring and not
writing it out to the volume. This works exactly as expected
when restoring into Linux LVM volumes and into Ceph RBD volumes,
provided they are freshly created.

Closes-bug: #2007615
Change-Id: I54b81a568a01af44e3f74bcac55e823cdae9bfbf
2023-03-17 18:46:48 -05:00

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---
fixes:
- |
`Bug #2007615 <https://bugs.launchpad.net/cinder/+bug/2007615>`_:
the restore operation of the Cinder backup service now restores into
sparse volumes, if possible. So, operators no longer need more space
than used previously when they restore from a disaster.