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:
Dec. 16, 2003
Filed:
Aug. 24, 2000
Marcelo Moraes de Azevedo, Cupertino, CA (US);
Robert L. Jardine, Cupertino, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
An apparatus and protocol to determine the group of processors that will survive communications faults and/or timed-event failures in a distributed multiprocessor or clustered system. The processors are coupled to one another by an inter-processor communication network that is used, inter alia, by each processor to send path probe messages to each of the other processor units on all available network paths. A processor is suspected of being communicatively isolated, or having ceased operations, when one or more of the other processors detects the absence of an acknowledgment response from the processor. When this happens, all of the processors are subjected to a series of stages in which they repeatedly broadcast their status and connectivity to each other.