JPS5786968A - Doubled computer system - Google Patents

Doubled computer system

Info

Publication number
JPS5786968A
JPS5786968A JP55163044A JP16304480A JPS5786968A JP S5786968 A JPS5786968 A JP S5786968A JP 55163044 A JP55163044 A JP 55163044A JP 16304480 A JP16304480 A JP 16304480A JP S5786968 A JPS5786968 A JP S5786968A
Authority
JP
Japan
Prior art keywords
equivalency
data
program
written
request
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55163044A
Other languages
Japanese (ja)
Other versions
JPS6119060B2 (en
Inventor
Shigeru Yamamoto
Shinichi Takigishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP55163044A priority Critical patent/JPS5786968A/en
Publication of JPS5786968A publication Critical patent/JPS5786968A/en
Publication of JPS6119060B2 publication Critical patent/JPS6119060B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To maintain excellent real-time characteristics by transferring data from the memory of an actual-operation side computer to that of the stand-by side one by a doubling control part on the basis of an equivalency request signal when data used by two computers in common is written by an equivalency program. CONSTITUTION:In the memories of computers 1 and 2 which use an I/O equipment 6 in common, pieces of information are stored in the order of an I/O control program, a data base, and an equivalency request program from a smaller address number, and access to data utilized by either computer in common during actual operation is attained through an equivalency request program. When the said data is written by the equivalency request program, an equivalency request signal is sent to a doubling control part 3, which switches an input-output bus switch 5 on the basis of the said request signal to transfer the written data from the memory of one actual-operation side computer to that of the other stand-by side computer.
JP55163044A 1980-11-19 1980-11-19 Doubled computer system Granted JPS5786968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55163044A JPS5786968A (en) 1980-11-19 1980-11-19 Doubled computer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55163044A JPS5786968A (en) 1980-11-19 1980-11-19 Doubled computer system

Publications (2)

Publication Number Publication Date
JPS5786968A true JPS5786968A (en) 1982-05-31
JPS6119060B2 JPS6119060B2 (en) 1986-05-15

Family

ID=15766107

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55163044A Granted JPS5786968A (en) 1980-11-19 1980-11-19 Doubled computer system

Country Status (1)

Country Link
JP (1) JPS5786968A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61206046A (en) * 1985-03-11 1986-09-12 Toshiba Corp Back-up device for programmable controller
JPH07319720A (en) * 1994-05-25 1995-12-08 Nec Corp System switching method for processor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS637438U (en) * 1986-07-01 1988-01-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61206046A (en) * 1985-03-11 1986-09-12 Toshiba Corp Back-up device for programmable controller
JPH07319720A (en) * 1994-05-25 1995-12-08 Nec Corp System switching method for processor

Also Published As

Publication number Publication date
JPS6119060B2 (en) 1986-05-15

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