<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 9, 2017 at 3:31 PM, Yaniv Kaul <span dir="ltr"><<a href="mailto:ykaul@redhat.com" target="_blank">ykaul@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On Thu, Feb 9, 2017 at 2:57 PM, Gianluca Cecchi <span dir="ltr"><<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hello,<div>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:</div><div><a href="https://bugzilla.redhat.com/827529" target="_blank">https://bugzilla.redhat.com/82<wbr>7529</a><br></div><div>Correct?</div><div><br></div><div>What about existing disks? Is there any way to convert?</div></div></blockquote><div><br></div></span><div>See the 'amend' part in the feature description page at[1].</div><div>Y.</div><div><br></div><div>[1] <a href="http://www.ovirt.org/develop/release-management/features/storage/qcow2v3/" target="_blank">http://www.ovirt.org/develop/r<wbr>elease-management/features/sto<wbr>rage/qcow2v3/</a></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span><div dir="ltr"><div>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?</div></div></span></blockquote></div></div></div></blockquote><div><br></div><div>Since the merge snapshot will be done using the qemu-img commit</div><div>The qcow version of the active volume, after the merge, will be the same as the old volume.</div><div><br></div><div>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).</div><div>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.</div><div><br></div><div>As Yaniv mentioned above, you can use the amend operation to update the QCOW version of all the volume's disk.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span><div dir="ltr"><div><br></div><div>Thanks,</div><div>Gianluca</div><div><br></div></div>
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