Patent ID: 7590737
Filing Date: 2009-09-15
Classification: G06F

Abstract:
1. A method, performed on a first node, said method comprising: selecting at least one of a plurality of input/output (I/O) fence mechanisms, wherein the at least one of a plurality of I/O fence mechanisms uses at least one coordinator resource, and said plurality of I/O fence mechanisms resides on said first node; detecting when a computer system cluster including a plurality of nodes is partitioned into at least two subclusters; generating fence mechanism comparison information operating on a first one of the plurality of nodes; comparing the fence mechanism comparison information with at least one of remote fence mechanism comparison information and local fence mechanism comparison information of the plurality of nodes; attempting to gain control of the at least one coordinator resource using the at least one of a plurality of I/O fence mechanisms; and removing at least one of the plurality of nodes from the computer system cluster in response to the attempting to gain control.