JPS5541528A - Dual file system - Google Patents

Dual file system

Info

Publication number
JPS5541528A
JPS5541528A JP11435078A JP11435078A JPS5541528A JP S5541528 A JPS5541528 A JP S5541528A JP 11435078 A JP11435078 A JP 11435078A JP 11435078 A JP11435078 A JP 11435078A JP S5541528 A JPS5541528 A JP S5541528A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
file
update
storage means
group
files
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
JP11435078A
Other versions
JPS5913783B2 (en )
Inventor
Hidemi Fujiwara
Tatsuo Hashimoto
Original Assignee
Fujitsu 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

Links

Abstract

PURPOSE:To release the disturbance of file groups dependent upon processing interrupt at a fualt time by providing a group control means in the dual file system where the processing to update pural files in group units is performed. CONSTITUTION:Group control means 41 is provided which sets/resets indications, which indicate that files are being updated in group units, to update storage means corresponding to individual files. For the purpose of restarting the system stopped by a fault, read means 52 reads out update storage means 12a and 22a and level storage means 12b and 22b of file 12 in the first file group and file 22 in the second file group. If update indication is set in one update storage means, the system is restored by the other file. If update indication is not set in both update storage means, update levels are compared with each other, and the file having a new update level is copied to the old file.
JP11435078A 1978-09-18 1978-09-18 Expired JPS5913783B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11435078A JPS5913783B2 (en) 1978-09-18 1978-09-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11435078A JPS5913783B2 (en) 1978-09-18 1978-09-18

Publications (2)

Publication Number Publication Date
JPS5541528A true true JPS5541528A (en) 1980-03-24
JPS5913783B2 JPS5913783B2 (en) 1984-03-31

Family

ID=14635541

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11435078A Expired JPS5913783B2 (en) 1978-09-18 1978-09-18

Country Status (1)

Country Link
JP (1) JPS5913783B2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229149A (en) * 1984-04-26 1985-11-14 Fujitsu Ltd File update system
JPS6347862A (en) * 1986-08-15 1988-02-29 Fujitsu Ltd Control system for input/output sub-system
US4819154A (en) * 1982-12-09 1989-04-04 Sequoia Systems, Inc. Memory back up system with one cache memory and two physically separated main memories
US4823261A (en) * 1986-11-24 1989-04-18 International Business Machines Corp. Multiprocessor system for updating status information through flip-flopping read version and write version of checkpoint data
JPH01118921A (en) * 1987-11-02 1989-05-11 Hitachi Ltd Control method for duplex disk
JPH01140220A (en) * 1987-11-26 1989-06-01 Hitachi Ltd Double disc controller
JPH02138686A (en) * 1989-10-04 1990-05-28 Fuji Electric Co Ltd Card reader controller for automatic vending machine
JPH0433030A (en) * 1990-05-24 1992-02-04 Fujitsu Ltd Data storing system
US5737514A (en) * 1995-11-29 1998-04-07 Texas Micro, Inc. Remote checkpoint memory system and protocol for fault-tolerant computer system
US5745672A (en) * 1995-11-29 1998-04-28 Texas Micro, Inc. Main memory system and checkpointing protocol for a fault-tolerant computer system using a read buffer
US5751939A (en) * 1995-11-29 1998-05-12 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system using an exclusive-or memory
US5787243A (en) * 1994-06-10 1998-07-28 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
US5864657A (en) * 1995-11-29 1999-01-26 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819154A (en) * 1982-12-09 1989-04-04 Sequoia Systems, Inc. Memory back up system with one cache memory and two physically separated main memories
JPS60229149A (en) * 1984-04-26 1985-11-14 Fujitsu Ltd File update system
JPH056222B2 (en) * 1986-08-15 1993-01-26 Fujitsu Ltd
JPS6347862A (en) * 1986-08-15 1988-02-29 Fujitsu Ltd Control system for input/output sub-system
US4823261A (en) * 1986-11-24 1989-04-18 International Business Machines Corp. Multiprocessor system for updating status information through flip-flopping read version and write version of checkpoint data
JPH01118921A (en) * 1987-11-02 1989-05-11 Hitachi Ltd Control method for duplex disk
JPH01140220A (en) * 1987-11-26 1989-06-01 Hitachi Ltd Double disc controller
JPH02138686A (en) * 1989-10-04 1990-05-28 Fuji Electric Co Ltd Card reader controller for automatic vending machine
JPH0433030A (en) * 1990-05-24 1992-02-04 Fujitsu Ltd Data storing system
US5787243A (en) * 1994-06-10 1998-07-28 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system
US5737514A (en) * 1995-11-29 1998-04-07 Texas Micro, Inc. Remote checkpoint memory system and protocol for fault-tolerant computer system
US5745672A (en) * 1995-11-29 1998-04-28 Texas Micro, Inc. Main memory system and checkpointing protocol for a fault-tolerant computer system using a read buffer
US5751939A (en) * 1995-11-29 1998-05-12 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system using an exclusive-or memory
US5864657A (en) * 1995-11-29 1999-01-26 Texas Micro, Inc. Main memory system and checkpointing protocol for fault-tolerant computer system

Also Published As

Publication number Publication date Type
JPS5913783B2 (en) 1984-03-31 grant

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