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CA1145477A Expired / Lapsed CA ⏱️ 0.0 years remaining

Method for carrying out synchronous operation in a duplex-processor system

Assignee: Fujitsu Ltd
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Filing: 1979-08-31
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Granted: 1983-04-26
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Expires: 1999-08-31
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Abstract

Abstract ABSTRACT OF THE DISCLOSURE The present invention discloses a method for carrying out synchronous operation in a duplex-processor system which is comprised of at least a first processor and a second processor. Either one of the processors accomplishes the data processing of the successive processing steps sequentially. The processing processor transfers the resultant data to the other processor each time a data processing step is completed, and the latter processor stores the transferred resultant data. The successive processing steps are segmented by respective predetermined breakpoints for a job. When the former processor is in an abnormal condition, the latter processor takes over the job from the predetermined nearest breakpoint by utilizing the last transferred resultant data produced in the processing step segmented by this nearest breakpoint.

Inventors

  • 👤 Masamichi Iwama
  • 👤 Satoru Tsushima
  • 👤 Koichi Watanabe

Bibliographic Details

Application Number —
Jurisdiction CA
Data Source google_patents
Last Synchronized 2026-10-31 23:56
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/20; G06F11/2097; G06F11/202; G06F11/2038

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 133 words
A method for carrying out synchronous operation in a duplex-processor system which is comprised of at least a first processor and a second processor, the first processor executes processing of data along the sequence of the successive processing steps, in accordance with programs, which method comprises the steps of: (a) transferring the resultant data from the first processor to the second processor every time a processing step is completed; (b) storing each resultant data in a memory of the second processor, and; (c) causing the second processor to take over the data processing when an accident or trouble occurs in the first pro-cessor, and to start processing from one of the programs which exist nearest the occurrence of the accident or trouble, by utilizing the last updated resultant data stored in the memory.
Claim 2
Independent Claim 133 words
A method for carrying out synchronous operation in a duplex-processor system which is comprised of at least a first processor and a second processor, the first processor executes processing of data along the sequence of the successive processing steps, in accordance with programs, which method comprises the steps of: (a) transferring the resultant data from the first processor to the second processor every time a processing step is completed; (b) storing each resultant data in a memory of the second processor, and; (c) causing the second processor to take over the data processing when an accident or trouble occurs in the first pro-cessor, and to start processing from one of the programs which exist nearest the occurrence of the accident or trouble, by utilizing the last updated resultant data stored in the memory.
Claim 3
Dependent Claim 25 words
A method as set forth in claim 1, wherein the successive processing steps are segmented, in advance, by breakpoints of a job to be processed.
Claim 4
Dependent Claim 66 words
A method as set forth in claim 2, wherein a restart address is allotted, in advance, to each break point, and also to each program, and the second processor picks up the restart address allotted to the breakpoint which exists nearest the occurrence of the accident or trouble, and then, the second processor starts processing from the program which is specified by the same restart address.
Claim 5
Dependent Claim 34 words
A method as set forth in claim 1, wherein the step (a) is performed by means of a communication interface adapter, which is comprised of a prallel/serial converter and contained in the first processor.
Claim 6
Dependent Claim 33 words
A method as set forth in claim 4, wherein a serial/parallel converter is contained in the second processor, the parallel/serial converter and the serial/parallel converter being connected by means of single communication wires.

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