Chaynika Saikia
bc9ab142da
If the last incremental backup is deleted then the backup snapshot is deleted but the source volume snapshot remains. Due to mismatch between the source volume snapshot and backup snapshot, there is an error when "rbd export-diff" and "rbd import-diff" is done. Hence, full backup happens. To fix this issue, all the previous source volume snapshots are preserved. When the last incremental backup is deleted, then its backup snapshot is deleted. But because all the source volume snaps exist, thus it can now update --from-snap for "rbd export-diff" to be the most recent source volume snapshot for which there exists a backup snapshot as well. This is how the incremental backup operation will go successful. For a user who upgrades to the new code, if the last backup snapshot and source volume snapshot are in sync, i.e. both of them exist, then the next create backup operation will continue as an incremental one. However, if there is no source volume snapshot for the last existing incremental backup (before the code was upgraded), then a full backup happens. After this full backup, all the next backups are incremental while all their corresponding source volume snapshots are also preserved. In this way, after a user upgrades, if he deletes the last incremental backup, the next create backup operation will be successful and be incremental. Since all the backup snapshots exist for all the backups, if the user wants to restore a backup, which was created before the code was upgraded, the user will not lose any data since the same base backup is used. Change-Id: Ia9c29bb720152d42bec273202fa49ca4b6a41ce2 Closes-Bug: #1703011
Team and repository tags
CINDER
You have come across a storage service for an open cloud computing service. It has identified itself as Cinder. It was abstracted from the Nova project.
- Wiki: https://wiki.openstack.org/Cinder
- Developer docs: https://docs.openstack.org/cinder/latest/
Getting Started
If you'd like to run from the master branch, you can clone the git repo:
For developer information please see HACKING.rst
You can raise bugs here https://bugs.launchpad.net/cinder
Python client
https://git.openstack.org/cgit/openstack/python-cinderclient