To ensure the most appropriate behavior is followed in both common and rare corner case events, the fencing algorithm works as follows:
Any system that loses a race will delay a short period of time before racing for the next disk. Under normal circumstances, the winner of the race to the first coordinator disk will win all disks.
This ensures a clear winner when multiple systems race for the coordinator disk, preventing the case where three or more systems each win the race for one coordinator disk.
The system in the smaller subcluster(s) delay a short period before beginning the race.
This ensures that as many systems as possible will remain running in the cluster.
The administrator must clear this condition manually with the vxfenclearpre
utility.