Electrical computers and digital processing systems: multicomput – Computer network managing – Computer network monitoring
Reexamination Certificate
2007-01-30
2007-01-30
Etienne, Ario (Department: 2157)
Electrical computers and digital processing systems: multicomput
Computer network managing
Computer network monitoring
C709S223000, C709S220000
Reexamination Certificate
active
09667769
ABSTRACT:
A cluster management unit provided in each of two servers carries out a state-transition in accordance with a state transition diagram both in cases where a fault occurs in at least one of the two servers and where the server is restored from the fault. A state writing processor provided in a server priority process unit of the each server stores, into a disk drive, a server priority determined based on a server state indicated by state change information. When faults occur in the two servers and at least one of the two servers is thereafter restored from the fault, a comparing processor in the server priority process unit of the one server determines whether or not the priority of the one server is higher than the priority of the other server, based on at least the priority of the one server. The cluster management unit of the one server carries out a corresponding state-transition based on this determination result and state transition diagram.
REFERENCES:
patent: 5757642 (1998-05-01), Jones
patent: 5781910 (1998-07-01), Gostanian et al.
patent: 6014686 (2000-01-01), Elnozahy et al.
patent: 6553401 (2003-04-01), Carter et al.
Endo Kotaro
Yamamoto Koji
El-chanti Hussein
Etienne Ario
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Kabushiki Kaisha Toshiba
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