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:
Mar. 27, 2007
Filed:
Apr. 29, 2003
Sudhir G. Rao, Brooklyn, NY (US);
Bruce M. Jackson, Beaverton, OR (US);
Sudhir G. Rao, Brooklyn, NY (US);
Bruce M. Jackson, Beaverton, OR (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for maintaining a discovery record and a cluster bootstrap record is provided. The discovery record enables shared storage system discovery and the cluster bootstrap record enables cluster discovery and cooperative cluster startup. The cluster bootstrap record is updated in response to a change in the cluster membership. The update is performed by a cluster leader in the form of a transactionally consistent I/O update to the cluster bootstrap record on disk and a distributed cache update across the cluster (). The update is aborted () in the event of a failure in the cluster leaving the cluster bootstrap record in a consistent state. In the event of a disastrous cluster and/or storage system failure, the discovery record may be recovered () from a restored storage system () and the cluster bootstrap record may be reset to install a new cluster in the old cluster's place ().