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:
Apr. 21, 2009
Filed:
Jun. 01, 2004
Austin Franky Manuel D'costa, Beaverton, OR (US);
James John Seeger, Portland, OR (US);
David Macnaughton Wolfe, Portland, OR (US);
David Daniel Zimmermann, Portland, OR (US);
Austin Franky Manuel D'Costa, Beaverton, OR (US);
James John Seeger, Portland, OR (US);
David Macnaughton Wolfe, Portland, OR (US);
David Daniel Zimmermann, Portland, OR (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A process for quiescing a master (master) and a plurality of subordinate computer systems (subordinates) in a cluster. An original or a pending state may be entered that is a quiesce or an online state. The master instructs the subordinates the quiesce or online state be made the pending state. The subordinates prepare to change accordingly, determine whether successful, and vote to commit or abort. Based on whether all voted to commit, the master instructs the subordinates to either commit or abort. If to commit and the pending state is the quiesce state, an operation is performed in the subordinates. If to commit and the pending state is the online state, the subordinates prepare to resume the original state. The subordinates change from the original to the pending state. Otherwise, if to abort, the subordinates prepare to remain in the original state and reset the pending to the original state.