On 05/26/2011 01:57 PM, Roman Schartlmüller wrote: > Hi, > > please explain me, how a pacemaker cluster, with an > even number of nodes, selects quorum when the cluster splits > into two evenly parts. For example a four-node-cluster breaks into two > partitions each with two nodes. > > Best regards, > Roman
It can't; Neither partition will gain quorum so both sides would lose quorum and stop providing clustered services. Quorum is 50% + 1. Adding a fifth node or using something like quroum disk (qdisk) to act as a tie-breaker would help. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org "I feel confined, only free to expand myself within boundaries." _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
