The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2006
Filed:
May. 28, 1999
Richard L. Frank, Groton, MA (US);
Michael J. Cusson, Chelmsford, MA (US);
Joydip Kundu, Nashu, NH (US);
Daniel E. O'shaughnessy, Hollis, NH (US);
Richard L. Frank, Groton, MA (US);
Michael J. Cusson, Chelmsford, MA (US);
Joydip Kundu, Nashu, NH (US);
Daniel E. O'Shaughnessy, Hollis, NH (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A quorumless network cluster provides a highly available system by addressing the partition-in-space and partition-in-time problems in network clusters. In a particular solution, a cluster manager (CM) can use disk based messaging to manage the operation of the cluster. Each node within the cluster must have access to a shared disk to operate within the cluster. A particular methodology can operate the cluster in a closed loop between nodesto N. If a node fails to receive a heartbeat message from its predecessor in the loop, it initiates a cluster reconfiguration by sending a reconfiguration message to each other node in the cluster. The quorumless cluster can also include a common storage for a cluster definition. Each node may provide a proposed change to the cluster definition, however only a single coordinator node may update the cluster definition and apply the suggested changes.