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Persistent group membership in a distributing computing system

  • US 7,953,837 B2
  • Filed: 06/13/2008
  • Issued: 05/31/2011
  • Est. Priority Date: 12/19/2003
  • Status: Active Grant
First Claim
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1. A non-transitory computer readable storage medium for maintaining persistent group memberships in a distributed computer system, the computer readable storage medium comprising programming instructions for:

  • operating a distribution computing system with a plurality of processing nodes;

    running at least one group service program for maintaining groups on at least one of the processing nodes, where each group maintains application specific information for a collection of processing resources, whereby at least two of the processing nodes operate as a plurality of subscriber nodes for subscribing to at least one of the groups as persistent subscriber nodes;

    maintaining a persistent subscriber node list of persistent subscriber nodes after the group dissolves so that subscription information is maintained;

    dissolving the at least one group so that a number of members in the group is zero; and

    notifying the persistent subscriber nodes listed in the persistent subscriber node list, in response to a group being reestablished indicating that the number of members of the group is non-zero, thereby eliminating a need for the persistent subscribers to re-subscribe to the group after it has been reestablished.

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