<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Apr 22, 2017 at 12:48 PM, Pranith Kumar Karampuri <span dir="ltr"><<a href="mailto:pkarampu@redhat.com" target="_blank">pkarampu@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>We are evolving a document to answer this question, the wip document is at <a href="https://github.com/karthik-us/glusterdocs/blob/1c97001d482923c2e6a9c566b3faf89d0c32b269/Administrator%20Guide/Split%20brain%20and%20ways%20to%20deal%20with%20it.md" target="_blank">https://github.com/karthik-us/<wbr>glusterdocs/blob/<wbr>1c97001d482923c2e6a9c566b3faf8<wbr>9d0c32b269/Administrator%<wbr>20Guide/Split%20brain%20and%<wbr>20ways%20to%20deal%20with%<wbr>20it.md</a><br><br></div>Let us know if you still have doubts after reading this.<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Tue, Apr 18, 2017 at 8:41 AM, Mahdi Adnan <span dir="ltr"><<a href="mailto:mahdi.adnan@outlook.com" target="_blank">mahdi.adnan@outlook.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
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Hi,<br>
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We have a replica 2 volume and we have issue with setting proper quorum.</p>
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The volumes used as datastore for vmware/ovirt, the current settings for the quorum are:</p>
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cluster.quorum-type: auto</p>
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cluster.server-quorum-type: server</p>
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cluster.server-quorum-ratio: 51%</p>
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Losing the first node which hosting the first bricks will take the storage domain in ovirt offline but in the FUSE mount point works fine "read/write"</p>
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Losing the second node or any other node that hosts only the second bricks of the replication will not affect ovirt storage domain i.e 2nd or 4th ndoes.</p>
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As i understand, losing the first brick in replica 2 volumes will render the volume to read only, but how FUSE mount works in read write ?</p>
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Also, can we add an arbiter node to the current replica 2 volume without losing data ? if yes, does the re-balance bug "Bug 1440635" affect this process ?</p></div></div></div></blockquote></div></div></blockquote><div> I remember we had one user in Redhat who wanted to do the same procedure on his production workload with 3.8.x upstream bits and it worked fine. I forget which version it was. Ravi, do you remember?<br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div>
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And what happen if we set "cluster.quorum-type: none" and the first node goes offline ? <br></p></div></div></div></blockquote></div></div></blockquote><div>cluster.quorum-type none is equivalent to no quorum, so the file can go into split-brains/ it can serve stale reads. Please don't do this on 3-way replica/arbiter volumes unless you know what you are doing. <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div><p dir="auto" style="text-align:left;margin-top:25px;margin-bottom:25px;font-family:sans-serif;font-size:11pt;color:black;background-color:white">
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Thank you. <br>
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Get <a href="https://aka.ms/ghei36" target="_blank">Outlook for Android</a></p>
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