Patent ID: 6449733
Filing Date: 2002-09-10
Classification: G06F

Abstract:
In a multiple processor system that includes a plurality of processor units interconnected for communicating therebetween, there being a primary process operating with an operating state on a one of the plurality of processor units and a backup process associated with another of the plurality of processor units, a method of replacing the primary and backup processes that includes the steps of:requesting that the backup process terminate operation; creating a replacement backup process on the another processor unit; establishing communication between the primary process and the replacement backup process to confirm compatibility between them; providing the replacement backup process with the operating state of the primary process; reversing roles of the primary process and the replacement backup process making them the new backup and new primary processes, respectively; terminating operation of the new backup process; creating a replacement new backup process on the another processor unit; providing the replacement new backup process with operating state of the of the new primary process; and reversing operating roles of the new backup primary process and the new primary process so that they become the replacement primary process and the replacement backup process, respectively.