Hello, after upgrading to oVirt 4.1 and setting cluster/datacenter to version 4, new images and snapshots should be created in qcow2 v3 format, based on bugzilla included in release notes: https://bugzilla.redhat.com/827529 Correct? What about existing disks? Is there any way to convert? What in case I have an old disk, I create a snapshot in 4.1 and then delete the snapshot? Will the live merged disk be in v3 format or v2? Thanks, Gianluca
On Thu, Feb 9, 2017 at 2:57 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
Hello, after upgrading to oVirt 4.1 and setting cluster/datacenter to version 4, new images and snapshots should be created in qcow2 v3 format, based on bugzilla included in release notes: https://bugzilla.redhat.com/827529 Correct?
What about existing disks? Is there any way to convert?
See the 'amend' part in the feature description page at[1]. Y. [1] http://www.ovirt.org/develop/release-management/features/storage/qcow2v3/
What in case I have an old disk, I create a snapshot in 4.1 and then delete the snapshot? Will the live merged disk be in v3 format or v2?
Thanks, Gianluca
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On Thu, Feb 9, 2017 at 3:31 PM, Yaniv Kaul <ykaul@redhat.com> wrote:
On Thu, Feb 9, 2017 at 2:57 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com
wrote:
Hello, after upgrading to oVirt 4.1 and setting cluster/datacenter to version 4, new images and snapshots should be created in qcow2 v3 format, based on bugzilla included in release notes: https://bugzilla.redhat.com/827529 Correct?
What about existing disks? Is there any way to convert?
See the 'amend' part in the feature description page at[1]. Y.
[1] http://www.ovirt.org/develop/release-management/features/sto rage/qcow2v3/
What in case I have an old disk, I create a snapshot in 4.1 and then delete the snapshot? Will the live merged disk be in v3 format or v2?
Since the merge snapshot will be done using the qemu-img commit The qcow version of the active volume, after the merge, will be the same as the old volume. So, for example if you had a QCOW2 version 2 volume with compatibility level of 0.10 and you create a new snapshot on DC 4.1 (That will make the new QCOW volume to be with compatibility level of 1.1, QCOW2V3). If afterwords you delete that snapshot, then the QCOW volume will be again, the same as it was before, QCOW2 version 2 with compatibility level of 0.10. As Yaniv mentioned above, you can use the amend operation to update the QCOW version of all the volume's disk.
Thanks, Gianluca
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participants (3)
-
Gianluca Cecchi -
Maor Lipchuk -
Yaniv Kaul