On Wed, Oct 21, 2009 at 1:48 PM, Colin <[email protected]> wrote: > Let's see whether I can summarise correctly:
basically all correct > > For Pacemaker + CoroSync/OpenAIS, the Pacemaker attribute > "expected-quorum-votes" tells the cluster how many votes it needs for > quorum. (What happens when the option is not set?) The cluster sets it for you based on how many nodes it can see. > For Pacemaker + Heartbeat, the Pacemaker attribute > "expected-quorum-votes" is ignored, and Heartbeat's idea of quorum is > used, i.e. (a) for a two-node cluster (list of cluster nodes has two > entries as per "cl_status listnodes") every node that is up and > running believes to have quorum, whether alone or not, and (b) for an > n-node cluster with n greater than two a partition with strictly > greater than 50% of the nodes has quorum. (IIRC (a) can be changed by > making the vote more complicated, i don't believe this is possible but may be mistaken > but I'm not interested in two-node > clusters and did not look into this.) > > Regards, Colin > > _______________________________________________ > Pacemaker mailing list > [email protected] > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > _______________________________________________ Pacemaker mailing list [email protected] http://oss.clusterlabs.org/mailman/listinfo/pacemaker
