Support for single-node quorum in a two-node nodeset for a shared disk parallel file system
First Claim
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1. A method for controlling access to data in a shared disk parallel data file, said method comprising the steps of:
- determining, in a two-node system, that communications to one node has failed;
determining whether or not the node that has not failed has been enabled for single-node quorum operation; and
upon detection of single node enablement status, fencing data access to and from said failed node.
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Abstract
A method is provided for continuing node operations in quorum-based protocols. This is particularly valuable in the situation in which a group of nodes includes only two nodes and in which communications to a node is lost. Provision is made for adding additional status indications to each node indicating whether or not it is enabled for single-node quorum operation. Provision is also made for identifying one node as a primary node and another node as a secondary node for time-out response purposes.
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Citations
4 Claims
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1. A method for controlling access to data in a shared disk parallel data file, said method comprising the steps of:
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determining, in a two-node system, that communications to one node has failed;
determining whether or not the node that has not failed has been enabled for single-node quorum operation; and
upon detection of single node enablement status, fencing data access to and from said failed node. - View Dependent Claims (2, 3, 4)
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Specification