On Tue, Jul 13, 2021 at 9:56 PM Strahil Nikolov <hunter86...@yahoo.com> wrote:
> 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 . If you are intending to use watchdog-fencing via sbd with a short watchdog-timeout that might speak for a full blown node as well. When using QDevice quorum-state update may occur with a different delay (up to roughly 30s using the default) which requires watchdog-timeout to be long enough for the nodes to survive till that is settled and stonith-watchdog-timeout to be even longer to prevent split-brain. > > Best Regards, > Strahil Nikolov > > On Tue, Jul 13, 2021 at 20:44, Andrei Borzenkov > <arvidj...@gmail.com> wrote: > On 13.07.2021 19:52, Gerry R Sommerville wrote: > > Hello everyone, > > I am currently comparing using QDevice vs adding a 3rd host to my > > even-number-node cluster and I am wondering about the details concerning > network > > communication. > > For example, say my cluster is utilizing multiple heartbeat rings. Would > the > > QDevice take into account and use the IPs specified in the different > rings? Or > > No. > > > does it only use the one specified under the quorum directive for > QDevice? > > Yes. Remote device is unrelated to corosync rings. Qdevice receives > information of current cluster membership from all nodes (point of > view), computes partitions and selects partition that will remain quorate. > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ >
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