JPS54148451A - Initiative-type duplicate data control system - Google Patents

Initiative-type duplicate data control system

Info

Publication number
JPS54148451A
JPS54148451A JP5778578A JP5778578A JPS54148451A JP S54148451 A JPS54148451 A JP S54148451A JP 5778578 A JP5778578 A JP 5778578A JP 5778578 A JP5778578 A JP 5778578A JP S54148451 A JPS54148451 A JP S54148451A
Authority
JP
Japan
Prior art keywords
time
computers
privileged computer
logic time
logic
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
JP5778578A
Other languages
Japanese (ja)
Other versions
JPS6022781B2 (en
Inventor
Yoshiyuki Nishihara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP53057785A priority Critical patent/JPS6022781B2/en
Publication of JPS54148451A publication Critical patent/JPS54148451A/en
Publication of JPS6022781B2 publication Critical patent/JPS6022781B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

PURPOSE: To maintain the identity of the duplicate data by making the logic time of the computers other than the privileged computer equal to the logic time of the privileged computer.
CONSTITUTION: Table control unit 1 receives the information of the logic time alteration for the computers other than the privileged computer through terminal 2, alters the contents of logic time table 3 comprising counters 3.1W3.n which are equal in number to all computers, and then informs the alteration to logic time control unit 4. Unit 4 is started by unit 1 to check the contents of table 3 and then advances the ligic time of the privileged computer by one when the logic time all computers except for the privileged computer becomes identical to the logic time of the privileged computer. At the same time, unit 4 gives the order to all computers except for the privileged computer through terminal 5 to indicate to advance the logic time of them. Thus, the logical synchronism of the ligic time can be secured between the privileged computer and other computers.
COPYRIGHT: (C)1979,JPO&Japio
JP53057785A 1978-05-15 1978-05-15 Initiated duplicate data control method Expired JPS6022781B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53057785A JPS6022781B2 (en) 1978-05-15 1978-05-15 Initiated duplicate data control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53057785A JPS6022781B2 (en) 1978-05-15 1978-05-15 Initiated duplicate data control method

Publications (2)

Publication Number Publication Date
JPS54148451A true JPS54148451A (en) 1979-11-20
JPS6022781B2 JPS6022781B2 (en) 1985-06-04

Family

ID=13065527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53057785A Expired JPS6022781B2 (en) 1978-05-15 1978-05-15 Initiated duplicate data control method

Country Status (1)

Country Link
JP (1) JPS6022781B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177649A (en) * 1986-01-30 1987-08-04 Nec Corp Process synchronizing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177649A (en) * 1986-01-30 1987-08-04 Nec Corp Process synchronizing method

Also Published As

Publication number Publication date
JPS6022781B2 (en) 1985-06-04

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