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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">Can I update VMs compatibility version without restarting VMs?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">According to the source code, restarting is required during upgrading to 4.1 only if a VM uses random generator device. If it doesn’t, a restart is not really
required.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black"><users-bounces@ovirt.org> on behalf of Tomas Jelinek <tjelinek@redhat.com><br>
<b>Date: </b>Monday, 12 June 2017 at 14:15<br>
<b>To: </b>James <james@jloh.co><br>
<b>Cc: </b>users <users@ovirt.org><br>
<b>Subject: </b>Re: [ovirt-users] Migrating oVirt cluster from 4.0 to 4.1<o:p></o:p></span></p>
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<p class="MsoNormal">On Mon, Jun 12, 2017 at 12:17 PM, James <<a href="mailto:james@jloh.co" target="_blank">james@jloh.co</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">We recently moved our oVirt cluster from 4.0 to 4.1 and have migrated<br>
all the hosts. The datacenter currently has a compatability setting of<br>
4.1 but the cluster is still on 4.0. As cross-cluster migrations has<br>
been removed (no option anymore?) we aren't 100% sure how to get the<br>
cluster onto 4.1 whilst keeping the VMs online. Do we just change the<br>
compatibility version live and it "just works" or do we have to have<br>
downtime?<o:p></o:p></p>
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<p class="MsoNormal">yes, you just change the compatibility version. The VMs which are down will be automatically updated and work with the new cluster, the running ones will be marked with a "triangle" icon and will be automatically updated on restart of them.<o:p></o:p></p>
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Any info would be great!<br>
<br>
Regards,<br>
James<br>
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