<div dir="ltr"><div><div><div><div><div><div>Hi,<br><br></div>Pardon me for jumping in subj, but...<br><br></div>Could you explain me in a few words or give a link where to read about "split-brain"?<br><br></div>I made a lab: cluster (virt and gluster services both) based on two server. With this options:<br> cluster.server-quorum-type none<br> cluster.quorum-type fixed<br> cluster.quorum-count 1<br></div>I get a cluster that worked just fine even with only one host alive. <br><br></div>I have run VM on a not SPM host B, have made some files, then on the SPM host A have stoped network service (host has gone, no power management), have made some huge files on the VM again, after that I have rebooted manualy the host A and there was no unexpected result. VM have worked without problem, I have rebooted the VM several times and there were no problems with any files I have made before.<br><br></div>I want to build a cluster with only two hosts, because I have only two good servers free, and only 8x3TB HDD (for RAID10 in each host). To get one more server and 4HDD is unbelievable in a close future..<br><div><div><div><br></div><div>Thanks. <br></div><div><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-06-03 16:54 GMT+03:00 Simone Tiraboschi <span dir="ltr"><<a href="mailto:stirabos@redhat.com" target="_blank">stirabos@redhat.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
<br>
----- Original Message -----<br>
> From: "Kiril L" <<a href="mailto:neohidra@gmail.com">neohidra@gmail.com</a>><br>
> To: <a href="mailto:users@ovirt.org">users@ovirt.org</a><br>
> Sent: Wednesday, June 3, 2015 3:32:52 PM<br>
> Subject: [ovirt-users] Is it a plausible configuration?<br>
><br>
> Would you please tell me if this configuration is doable or there is<br>
> something that i am missing?<br>
><br>
> I would like to use only two servers (X and Y) for VDI and Gluster<br>
> based storage.<br>
> Hosted engine for oVirt and replicated volumes between X and Y for the<br>
> gluster storage. Is a third machine Z a must?<br>
<br>
</span>It works also with just two hosts but it's not that safe: a replica-2 GlusterFS volume affected by a split-brain issue could be not self-healing while with replica-3 you could rely on quorum enforcement just cause you are using an odd host number.<br>
<br>
For oVirt 3.6 we are working on <a href="http://www.ovirt.org/Features/Self_Hosted_Engine_Hyper_Converged_Gluster_Support" target="_blank">http://www.ovirt.org/Features/Self_Hosted_Engine_Hyper_Converged_Gluster_Support</a><br>
<div class="HOEnZb"><div class="h5"><br>
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