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. 14, 1998
Filed:
Jul. 01, 1996
Applicant:
Inventors:
Joseph E Cunliffe, Colorado Springs, CO (US);
Dale R Passmore, Colorado Springs, CO (US);
Assignee:
Sun Microsystems, Inc., Mountain View, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
39518204 ; 707 10 ; 707202 ;
Abstract
A system, method and computer program product for ensuring that a replicated computer database does not encounter a 'split brain' problem by replicating the database and requiring a replica quorum wherein at least (50% +1) of the replicas are accessible and in agreement. When a replica quorum in not obtainable, but 50% of the copies of the data are in agreement, an external source, or 'mediator', is called upon to provide a deciding vote (+1) to ensure that the data can be trusted.