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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Oscar,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">I’d make two notes:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">1. Local storage datacenter doesn’t support multiple hosts. If you have multiple hosts, you have to have a shared storage, even it’s a hyper-converged setup.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="RU" style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">2. In your case most of disk and network performance would be used by backups. And a backup cycle would take more than 24 hours. Even rsync would take much resources since it has to at
least read the whole disk images.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">I’d recommend a scenario with a dedicated shared storage that supports snapshots.</span><span lang="RU" style="font-size:11.0pt;font-family:Calibri"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><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 Oscar Segarra <oscar.segarra@gmail.com><br>
<b>Date: </b>Wednesday 23 November 2016 at 03:11<br>
<b>To: </b>Yaniv Dary <ydary@redhat.com><br>
<b>Cc: </b>users <users@ovirt.org><br>
<b>Subject: </b>Re: [ovirt-users] Storage questions<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">Hi, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">As on oVirt is it possible to attach local storage I supose it can be used to run virtual machines:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have drawn a couple of diagrams in order to know if is it possible to set up this configuration:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">1.- In on-going scenario:<o:p></o:p></p>
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<p class="MsoNormal">Every host runs 100 vdi virtual machines whose disks are placed on local storage. There is a common gluster volume shared between all nodes.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><img width="562" height="207" id="_x0000_i1025" src="cid:image001.png@01D24589.D5C3C9E0" alt="mágenes integradas 1"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2.- If one node fails:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><img width="562" height="253" id="_x0000_i1026" src="cid:image002.png@01D24589.D5C3C9E0" alt="mágenes integradas 2"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">oVirt has to be able to inventory the copy of machines (in our example vdi201 ... vdi300) and start them on remaining nodes.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">¿Is it possible to reach this configuration with oVirt? ¿or something similar?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Making backup with the import-export procedure based on snapshot can take lot of time and resources. Incremental rsync is cheaper in terms of resources.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks lot.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2016-11-22 10:49 GMT+01:00 Yaniv Dary <<a href="mailto:ydary@redhat.com" target="_blank">ydary@redhat.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal">I suggest you setup that environment and test for the performance and report if you have issues. <o:p></o:p></p>
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<p class="MsoNormal">Please note that currently there is no data locality guarantee, so a VM might be running on a host that doesn't have its disks.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We have APIs to do backup\restore and that is the only supported option for backup:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://www.ovirt.org/develop/release-management/features/storage/backup-restore-api-integration/" target="_blank">https://www.ovirt.org/develop/release-management/features/storage/backup-restore-api-integration/</a><o:p></o:p></p>
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<p class="MsoNormal">You can look at the Gluster DR option that was posted a while back, you can look that up.<o:p></o:p></p>
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<p class="MsoNormal">It used geo replication and import storage domain to do the DR.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<pre><span style="font-family:Arial">Yaniv Dary<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">Technical Product Manager<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">Red Hat Israel Ltd.<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">34 Jerusalem Road<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">Building A, 4th floor<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">Ra'anana, Israel 4350109<o:p></o:p></span></pre>
<pre><span style="font-family:Arial"><o:p> </o:p></span></pre>
<pre><span style="font-family:Arial">Tel : <a href="tel:%2B972%20%289%29%207692306" target="_blank">+972 (9) 7692306</a><o:p></o:p></span></pre>
<pre><span style="font-family:Arial"> 8272306<o:p></o:p></span></pre>
<pre><span style="font-family:Arial">Email: <a href="mailto:ydary@redhat.com" target="_blank">ydary@redhat.com</a><o:p></o:p></span></pre>
<pre><span style="font-family:Arial">IRC : ydary</span><o:p></o:p></pre>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Nov 21, 2016 at 5:17 PM, Oscar Segarra <<a href="mailto:oscar.segarra@gmail.com" target="_blank">oscar.segarra@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm planning to deploy a scalable VDI infraestructure where each phisical host can run over 100 VDIs and I'd like to deploy 10 physical hosts (1000 VDIs).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In order to avoid performance problems (replicating 1000VDIs changes over gluster network I think can provoque performance problems) I have thought to use local storage for VDI assuming that VDIs cannot be migrated between phisical hosts.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">¿Is my worry founded in terms of performance?<o:p></o:p></p>
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<p class="MsoNormal">¿Is it possible to utilize local SSD storage for VDIs?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'd like to configure a gluster volume for backup on rotational disks (tiered+replica 2+ stripe=2) just to provide HA if a physical host fails.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">¿Is it possible to use rsync for backing up VDIs?<o:p></o:p></p>
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<p class="MsoNormal">If not ¿How can I sync/backup the VDIs running on local storage on the gluster shared storage?<o:p></o:p></p>
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<p class="MsoNormal">If a physical host fails ¿How can I start the latest backup of the VDI on the shared gluster?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks a lot<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>
Users mailing list<br>
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<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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