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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">The dirty bitmap is already working well enough in QEMU 2.6. It can be used via LibVirt qemu-monitor-command. The only issue is that dirty bitmaps
do not sustain VM restarts, snapshot creating/deleting, and VM live migration. However, this is not a big issue if you perform backups often than these operations. Since backups are in the qcow2 format, they can be placed on the Export storage, and restored
directly from oVirt.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US">It would be relative simple to implement third-party backup solution, if disk locking mechanics was accessible via oVirt API. Implement this directly
in oVirt would be even simpler as a Live Export feature, since dirty bitmaps work exactly like snapshots, and oVirt already has most of required logic.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;mso-fareast-language:EN-US"><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 Yaniv Kaul <ykaul@redhat.com><br>
<b>Date: </b>Monday, 11 September 2017 at 17:14<br>
<b>To: </b>Demeter Tibor <tdemeter@itsmart.hu><br>
<b>Cc: </b>users <users@ovirt.org><br>
<b>Subject: </b>Re: [ovirt-users] CBT question<o:p></o:p></span></p>
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<p class="MsoNormal">On Mon, Sep 11, 2017 at 4:17 PM, Demeter Tibor <<a href="mailto:tdemeter@itsmart.hu" target="_blank">tdemeter@itsmart.hu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black">Dear Listmembers,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black">Somebody know when will be available the CBT (changed block tracking) feature in ovirt/rhev?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It has to be implemented first in QEMU - where it is still being worked on.<o:p></o:p></p>
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<p class="MsoNormal">We plan to take advantage of it after it is ready in QEMU (and libvirt of course).<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black">We looking for an usable backup solution for our ovirt guests, but I've see, there are some API limitation yet.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">But nevertheless there are various backup solutions that can be used today, even if not as efficient as CBT.<o:p></o:p></p>
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<p class="MsoNormal">Y.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black">Thanks in advance,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:black">R<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:#888888"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Arial;color:#888888">Tibor<o:p></o:p></span></p>
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_______________________________________________<br>
Users mailing list<br>
<a href="mailto:Users@ovirt.org">Users@ovirt.org</a><br>
<a href="http://lists.ovirt.org/mailman/listinfo/users" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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