<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 13, 2021 at 9:56 PM Strahil Nikolov <<a href="mailto:hunter86_bg@yahoo.com">hunter86_bg@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">In some cases the third location has a single IP and it makes sense to use it as QDevice. If it has multiple network connections to that location - use a full blown node .</blockquote><div>If you are intending to use watchdog-fencing via sbd with a short watchdog-timeout</div><div>that might speak for a full blown node as well. When using QDevice quorum-state</div><div>update may occur with a different delay (up to roughly 30s using the default) which</div><div>requires watchdog-timeout to be long enough for the nodes to survive till that is</div><div>settled and stonith-watchdog-timeout to be even longer to prevent split-brain. </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id="gmail-m_5746328911620171787yMail_cursorElementTracker_1626206117951"><br></div><div id="gmail-m_5746328911620171787yMail_cursorElementTracker_1626206118188">Best Regards,</div><div id="gmail-m_5746328911620171787yMail_cursorElementTracker_1626206122048">Strahil Nikolov<br> <br> <blockquote style="margin:0px 0px 20px"> <div style="font-family:Roboto,sans-serif;color:rgb(109,0,246)"> <div>On Tue, Jul 13, 2021 at 20:44, Andrei Borzenkov</div><div><<a href="mailto:arvidjaar@gmail.com" target="_blank">arvidjaar@gmail.com</a>> wrote:</div> </div> <div style="padding:10px 0px 0px 20px;margin:10px 0px 0px;border-left:1px solid rgb(109,0,246)"> On 13.07.2021 19:52, Gerry R Sommerville wrote:<br clear="none">> Hello everyone,<br clear="none">> I am currently comparing using QDevice vs adding a 3rd host to my <br clear="none">> even-number-node cluster and I am wondering about the details concerning network <br clear="none">> communication.<br clear="none">> For example, say my cluster is utilizing multiple heartbeat rings. Would the <br clear="none">> QDevice take into account and use the IPs specified in the different rings? Or <br clear="none"><br clear="none">No.<br clear="none"><br clear="none">> does it only use the one specified under the quorum directive for QDevice?<br clear="none"><br clear="none">Yes. Remote device is unrelated to corosync rings. Qdevice receives<br clear="none">information of current cluster membership from all nodes (point of<br clear="none">view), computes partitions and selects partition that will remain quorate.<div id="gmail-m_5746328911620171787yqtfd51932"><br clear="none">_______________________________________________<br clear="none">Manage your subscription:<br clear="none"><a shape="rect" href="https://lists.clusterlabs.org/mailman/listinfo/users" target="_blank">https://lists.clusterlabs.org/mailman/listinfo/users</a><br clear="none"><br clear="none">ClusterLabs home: <a shape="rect" href="https://www.clusterlabs.org/" target="_blank">https://www.clusterlabs.org/</a><br clear="none"></div> </div> </blockquote></div>_______________________________________________<br>
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