System for selecting one cluster of processors and upgrading the

Details System for selecting one cluster of processors and upgrading the System for selecting one cluster of processors and upgrading the

1995-05-08

1998-03-17

Meky, Moustafa M.

G06F 1502

Patent

active

057297614

ABSTRACT:
A plurality of processors of a disk controller are divided into a plurality of clusters. In normal operation, data is transferred between a host computer and a disk drive in a cluster non-restricted processing mode in which a job can be distributedly processed among processors belonging to any clusters without regard to cluster. In response to a program version upgrading command from an operator, the cluster mode is shifted from the cluster non-restricted processing mode to a cluster restricted processing mode in which the cluster to which processors which are permitted to distributedly process one job belong is restricted. When the shifting to the cluster restricted processing mode is completed, one cluster is selected as a cluster to be maintained and version of the programs to be executed by the processors belonging to the cluster to be maintained are upgraded. When the version of the programs of all processors of the cluster to be maintained have been upgraded, the acceptance of a new job by the processors belonging to the cluster to be maintained is resumed and the execution of the new programs is started. The selection of the cluster, the version upgrading of the programs and the start of the execution of the new programs are repeated sequentially for all clusters. When the version upgrading of the programs of all processors is completed, the cluster mode is returned from the cluster restricted processing mode to the cluster non-restricted processing mode.

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"A New Approach to Real-Time Simulation: Flexible Function-Clusters on the Butterfly Parallel Proessor", Dr. W. Celmaster, BBN Advanced Computers Inc., Cambridge, MA, pp. 105-114.

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