JPS5627461A - File share control system - Google Patents

File share control system

Info

Publication number
JPS5627461A
JPS5627461A JP10333179A JP10333179A JPS5627461A JP S5627461 A JPS5627461 A JP S5627461A JP 10333179 A JP10333179 A JP 10333179A JP 10333179 A JP10333179 A JP 10333179A JP S5627461 A JPS5627461 A JP S5627461A
Authority
JP
Japan
Prior art keywords
discrimination number
cpu1
file
cpu
controller
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.)
Pending
Application number
JP10333179A
Other languages
Japanese (ja)
Inventor
Masashi Nozawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10333179A priority Critical patent/JPS5627461A/en
Publication of JPS5627461A publication Critical patent/JPS5627461A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To prevent the performance of an external memory from deteriorating and to improve a throughput by making an occupancy assignment of every small area by dividing the external memory unit and by occupaying them without reference to a specific path.
CONSTITUTION: Controllers 7 and 8, when receiving file occupancy commands from CPU1 and 2, refer to registers, which correspond to path A, for example, of CPU discrimination number setting part in units 7 and 8 and CPU1 or 2 reads its characteristic discrimination number. Then, this discrimination number is sent to controller 9 and displayed while written in a track range that corresponds to a small area where a file to occupy the discrimination number is stored. On the other hand, when the file access command is received from CPU1 or 2, the memory of controller 9 is referred to and when a track region to be accessed is not occupied by the other CPU, the access is permitted.
COPYRIGHT: (C)1981,JPO&Japio
JP10333179A 1979-08-13 1979-08-13 File share control system Pending JPS5627461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10333179A JPS5627461A (en) 1979-08-13 1979-08-13 File share control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10333179A JPS5627461A (en) 1979-08-13 1979-08-13 File share control system

Publications (1)

Publication Number Publication Date
JPS5627461A true JPS5627461A (en) 1981-03-17

Family

ID=14351174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10333179A Pending JPS5627461A (en) 1979-08-13 1979-08-13 File share control system

Country Status (1)

Country Link
JP (1) JPS5627461A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5667467A (en) * 1979-11-02 1981-06-06 Nec Corp File system
JPS5827255A (en) * 1981-08-12 1983-02-17 Hitachi Ltd Controlling system of file used for plural electronic computers in common
JPS58127258A (en) * 1982-01-25 1983-07-29 Hitachi Ltd Exclusive controlling system of external storage device
JPS60100238A (en) * 1983-11-02 1985-06-04 Nec Corp Control system for shared file
JPS60110053A (en) * 1983-11-21 1985-06-15 Nec Corp File controller
JPH02113350A (en) * 1988-10-24 1990-04-25 Nec Corp File processor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5667467A (en) * 1979-11-02 1981-06-06 Nec Corp File system
JPS5827255A (en) * 1981-08-12 1983-02-17 Hitachi Ltd Controlling system of file used for plural electronic computers in common
JPH0115899B2 (en) * 1981-08-12 1989-03-22 Hitachi Ltd
JPS58127258A (en) * 1982-01-25 1983-07-29 Hitachi Ltd Exclusive controlling system of external storage device
JPS60100238A (en) * 1983-11-02 1985-06-04 Nec Corp Control system for shared file
JPS60110053A (en) * 1983-11-21 1985-06-15 Nec Corp File controller
JPH02113350A (en) * 1988-10-24 1990-04-25 Nec Corp File processor

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