Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral adapting
Reexamination Certificate
2004-11-18
2009-02-24
Tsai, Henry W. H. (Department: 2184)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral adapting
C714S001000
Reexamination Certificate
active
07496701
ABSTRACT:
A computer system includes a support system that report events, faults, and failures to a master virtual server. While the support system may be accessed and used by a multitude of virtual servers, only the master virtual server can manage the support system. The support system include a master lock register, a heartbeat timer, and a digital processing device (“processor”). Upon initialization and if the master lock register is empty, a virtual server asserts ownership over the support system by writing its identification into the master lock register, becoming the master virtual server. The master virtual server transmits periodic heartbeats to the support system to communicate that it is still viable and in control. If the heartbeat timer expires without communication from the master virtual server, the processor clears the master lock register and transmits a broadcast message inviting all connected virtual servers to attempt to assert control.
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Crawford Timothy J.
Hunt Brandon L.
Rinaldi Brian A.
Ripberger Richard A.
International Business Machines - Corporation
Nam Hyun
Quarles & Brady LLP
Tsai Henry W. H.
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