JPS63238643A - Duplex file access control system - Google Patents

Abstract

PURPOSE:To shorten the waiting time for a file access, by inputting a data from a file which has become inputtable first among a main system file and a subsystem file. CONSTITUTION:An input/output executing means 7 is started by an input/output control means 4, refers to an input/output queue with respect to a main system input/output queue 8 and a subsystem input/output queue 9, and determines an input required to be executed in the next time. Subsequently, before executing the input request, an input/output queue deleting means 6 is started, whether this input request exists in the input/output queue of the other system or not is decided, and when said request exists, its input request is deleted from the input/output queue of the other system. Thereafter, the input/output executing means 7 executes an input processing to a main system file 12 or a subsystem file 13, by which a data can be inputted from a file which has become inputtable first among a main system file 12 and a subsystem file 13. In such a way, the waiting time for a file access can be decreased remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a duplex file access control system for a data processing device.

[Conventional technology]

Conventionally, in this type of duplex file access control method,
When an input request was made to the duplex file, data was always input from the main file.

[Problem that the invention seeks to solve]

In the conventional duplex file access control method described above,
When an input request is made to the duplex file, data is always input from the main file, which has the disadvantage of increasing the waiting time for file access.

SUMMARY OF THE INVENTION An object of the present invention is to provide a duplex file access control method that can eliminate the above drawbacks and significantly reduce file access waiting time.

[Means for solving problems]

The duplex file access control method of the present invention includes an input/output control means that performs input/output control on a master file and a slave file when an input request is made to the duplex file; a main system input/output queue and a yarn input/output queue for queuing input/output requests to the main system input/output queue and a yarn input/output queue; an input/output registration means for registering for each of the yarn input/output queues; and an input request activated by the input/output control means and queued at the head of the main input/output queue and the yarn input/output queue. input/output execution means that executes input/output execution means for the main file and files and the slave file; and input/output queue deletion means for deleting the input request from the input/output queue.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a system block diagram mainly showing the flow of data in an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the input/output queue registration means 5 of FIG. 1, and FIG. Flowchart showing the operation of the input/output execution means 7, No. 4
The figure is a flowchart showing the operation of the input/output queue deletion means 6 of FIG.

Referring to FIG. 1, one embodiment of the present invention is a data processing device 1. Office processing program 2. File access control means 3. Input/output control means 4. Input/output queue registration means5. Input/output queue deletion means 6. Input/output execution means 7. Main input/output queue 8. Slave input/output queue9. External storage device 10-1
and 10-2, duplex file 11. Main file 1
2. It is composed of slave files 13.

Referring to FIG. 2, the input/output queue registration means 5 includes the main input/output queue registration section 21. Following yarn input/output queue registration section 22
It consists of

Referring to FIG. 3, the input/output execution means 7 includes an execution input request determining section 31. I/O queue deletion means activation unit 32. It is composed of an input request execution section 33.

Referring to FIG. 4, the input/output queue deletion means 6 includes the input request existence predetermining section 41. It consists of an input request deletion section 42.

This system has a duplex file 11 consisting of a main file 12 and a slave file 13 in external storage devices 10-1 and 10-2.

When the office processing program 2 issues an input request to the duplicated file 11, the file access control means 3 activates the input/output control means 4. The input/output control means 4 activates the input/output queue registration means 5 in order to queue the input request. The input/output queue registration means 5 registers the input request in the main output queue 8 through the main input/output queue registration section 21, and then registers the input request into the yarn input/output through the slave input/output queue registration section 22. Register in queue 9.

The input/output execution means 7 is activated by the input/output control means 4 and executes the following processing on the main input/output queue 8 and yarn input/output queue 9.

The execution input request determining unit 31 refers to the input/output queue and determines the input request to be executed next. Next, the input/output execution means 7 activates the input/output queue deletion means 6 using the input/output queue deletion means activation section 32 before executing the input request. It is determined whether the input request exists in the input/output queue of the other system, and if it exists, the input request deletion unit 42 deletes the input request from the input/output queue of the other system.

Thereafter, the input/output execution unit 7 uses the input request execution unit 33 to request the input/output execution unit 7 to output the main file 12 or the slave file 1.
By executing the input processing for 3, it becomes possible to input data from the file that becomes inputtable first among the main file 12 and the slave file 13.

〔Effect of the invention〕

As explained above, in the present invention, when an input request is made to a duplex file, data is not always input from the main file, but from the file that becomes inputtable first from the main file or the slave file. By inputting , it has the effect of shortening the waiting time for file access.

[Brief explanation of drawings]

FIG. 1 is a block diagram mainly showing the flow of data in an embodiment of the present invention, and FIG. 2 is a block diagram showing the input/output queue registration means 5 of FIG.
3 is a flowchart showing the operation of the input/output execution means 7 in FIG. 1, and FIG.
It is a figure which shows the structure of the input-output queue deletion means 6 of a figure. DESCRIPTION OF SYMBOLS 1... Data processing device, 2... Office processing program, 3... File access control means, 4... Input/output control means, 5... Input/output queue registration means, 6... Input/output Queue deletion means, 7... Input/output execution means, 8...
・Main system input/output queue, 9... Yarn input/output queue, 10
-1.10-2...External storage device, 11...Duplicated file, 12...Main file, 13...Slave file 1 time

Claims (1)

[Claims] In a system that performs input/output control on two files, a main file and a slave file, secured in an external storage device as one logical file, a duplex file.
an input/output control means for controlling input/output to the main file and the slave file when an input/output request is made to the duplex file, and a queue for input/output requests to each of the master file and the slave file. A master input/output queue and a slave input/output queue are activated by the input/output control means, and when an input request to the duplexed file is made, the input request is sent to the master input/output queue and the slave input/output queue. an input/output queue registration means for registering each input request, and input requests activated by the input/output control means and queued at the head of the input/output queue and the slave input/output queue to the master file and the slave input/output queue. an input/output execution means that executes on a system file, and deletes the input request from another input/output queue before executing the input request to the main file and the slave file activated by the input/output execution means and an input/output queue deletion means, so that when an input request to the duplex file is made, data can be input first between the main file and the slave file instead of always inputting data from the main file. A redundant file access control method characterized by shortening the waiting time for file access by inputting data from a file that has become .