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. 17, 2009
Filed:
Jun. 09, 2008
William T. Boyd, Poughkeepsie, NY (US);
Douglas M. Freimuth, New York, NY (US);
William G. Holland, Cary, NC (US);
Steven W. Hunter, Raleigh, NC (US);
Renato J. Recio, Austin, TX (US);
Steven M. Thurber, Austin, TX (US);
Madeline Vega, Austin, TX (US);
William T. Boyd, Poughkeepsie, NY (US);
Douglas M. Freimuth, New York, NY (US);
William G. Holland, Cary, NC (US);
Steven W. Hunter, Raleigh, NC (US);
Renato J. Recio, Austin, TX (US);
Steven M. Thurber, Austin, TX (US);
Madeline Vega, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is directed to use of a master root node, in a distributed computer system provided with multiple root nodes, to control the configuration of routings through an I/O switched-fabric. One of the root nodes is designated as the master root node or PCI Configuration Manager (PCM), and is operable to carry out the configuration while each of the other root nodes remains in a quiescent or inactive state. In one useful embodiment pertaining to a system of the above type, that includes multiple root nodes, PCI switches, and PCI adapters available for sharing by different root nodes, a method is provided wherein the master root node is operated to configure routings through the PCI switches. Respective routings are configured between respective root nodes and the PCI adapters, wherein each of the configured routings corresponds to only one of the root nodes. A particular root node is enabled to access each of the PCI adapters that are included in any configured routing that corresponds to the particular root node. At the same time, the master root node writes into a particular root node only the configured routings that correspond to the particular root node. Thus, the particular root node is prevented from accessing an adapter that is not included in its corresponding routings.