G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 9/52 (2006.01) G06F 9/06 (2006.01) G06F 9/445 (2006.01)
Patent
CA 2313934
An active processing element undergoes a software migration while under the control of an in-service original software system. A replacement software system is loaded into an available memory partition within the active processing element while the original software system continues to control the active processing element and its services. The original software system continues to control the active processing element as the replacement software system is configured and synchronized with the original software system. Once a set of dynamic state information within the replacement software system is synchronized to permit the replacement software to take control of at least a portion of the services supported by the processing element, control over such portion of services is transferred from the original software system to the replacement software system in response to a predetermined event such as a command from the system administrator or a fault condition detected in the original software system. As control over services provided by the processing element passes to the replacement software system, corresponding components of the original software system are placed in an inactive state. Once control over all services provided by the processing element is transferred to the replacement software system, the original software system is rendered fully inactive, although the original software system may continue to use processing resources of the processing element to support the remainder of the software migration, including transferring any remaining state information required by the replacement software system. An image of the original software system is stored on a migration archive for diagnosis.
Adamovits Peter Joseph
Berube Louis Pierre
Dysart Keith Clifford
Mussar Gary P.
Nortel Networks Corporation
Nortel Networks Limited
Smart & Biggar
LandOfFree
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