Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2006-03-28
2006-03-28
Beausoliel, Robert (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
Reexamination Certificate
active
07020800
ABSTRACT:
A system and method for memory failure recovery is disclosed. The method discloses the steps of maintaining a predetermined number of duplicate and primary processes; keeping the processes in synchronization; managing the processes so that a single process image is presented to an external environment; detecting a computer system exception which affects one of the processes; and terminating the affected process. The system discloses, a primary process memory space which hosts a primary process; a duplicate process memory space which hosts a duplicate process corresponding to the primary process; a synchronization buffer which keeps the duplicate process in synchronization with the primary process; a processor which generates an exception signal in response to detection of a memory failure condition which affects the primary process; and an operating system which receives the exception signal, terminates the affected primary process, and maintains a predetermined number of primary and duplicate processes.
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Thomas C. Bressoud and Fred B. Schneider: “Hypervisor-Based Fault-Tolerance” Dec. 1995, pp. 1-11 SIGOPS '95.
Bernadat Philippe
Fu Guangrui
Messer Alan
Milojicic Dejan S.
Beausoliel Robert
Bonura Timothy M.
Hewlett--Packard Development Company, L.P.
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