This page provides additional information on how quorum works in GPFS.
Topics
If there are two nodes using quorum with tiebreaker disks and network connection between them is lost, who wins?
If there are two nodes using quorum with tiebreaker disks and network connection between them is lost, who wins?
If the Cluster Manager node still has access to a majority of the tiebreaker disks, then the nodes that can still communicate with the Cluster Manager node will form the surviving group.
In GPFS release 3.2 you can move the Cluster Manager using
mmchmgr -c $nodename
One anomaly of this is that the Cluster Manager may be the only remaining node if its network gets disconnected. To prevent this you can define a minimum number of nodes:
mmchconfig minQuorumNodes=2
This requires that the Cluster Manager have a co-conspirator.
