JPH0362238A - Back-up system for decision of file capacity - Google Patents

Abstract

PURPOSE:To enable a user to set the capacity of an output-only file to an operating system by displaying the file capacity that may possibly be needed by a dummy file as an output-only file at the end of a user program. CONSTITUTION:An output information store area 51 of a main storage 5 stores the capacity of data outputted every time an executing sentence of a data output request is carried out to a file which performs no output process. Then a file capacity display means 22 displays the file capacity that may possibly be needed when a file having no output process performs an output process on a display device 4 by reference to the capacity of the data stored in the area 51 via an output information store means 21 at the end of a user program. As a result, the capacity of an output-only file can be set to an operating system.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a file capacity determination support method, and in particular, to a file capacity determination support method, in particular, it is possible to perform output processing in response to an output request without allocating devices and resources as a file structure to a user program. This invention relates to a file capacity determination support method when a file that does not perform this process is connected.

[Conventional technology]

Conventionally, in the debugging stage, there is no need to output to an output-only file, and instead, a file (hereinafter referred to as a dummy file) that does not perform output processing in response to an output request is connected as a file structure without allocating devices and resources. When developing a user program that executes the user program, connects an output-only file when debugging is completed, executes the user program, and creates a form, etc., in the debugging stage, when the user program is executed, Information such as the file capacity of the output-only file that would actually be needed was not displayed anywhere.

[Problem to be solved by the invention]

In the conventional technology described above, when a dummy file is connected and a user program is executed, information indicating how much file capacity is required as an output-only file is not obtained, so the user program In the case of an operating system that has an input/output mechanism in which the user sets the file capacity of the output-only file used when executing, how much file capacity should be secured when actually outputting to the output-only file? The drawback is that you don't know if it's good or not.

For this reason, conventionally, users set the file size of output-only files based on their experience and intuition, or according to the file size predetermined by the operating system's input/output structure. If the file capacity of an output-only file whose file capacity has been set is set to be larger than the file capacity required for execution of a user program, there is a drawback that the usage efficiency of the output-only file will deteriorate.

Conversely, if you set a file size that is less than the required file size, if the operating system's input/output mechanism is equipped with an output-only file extension function, it will be detected when the user program is executed that the file is extremely small. Execution performance deteriorates because files are frequently extended, and if the extension function is not provided, the user program may terminate abnormally during execution.

In view of the above-mentioned points, an object of the present invention is to provide a file that is required as an output-only file at the end of the user program when the user connects a download file instead of the output-only file and executes the user program. An object of the present invention is to provide a file capacity determination support method that displays the likely file capacity.

[Means to solve the problem]

The file capacity determination support method of the present invention is an operating system that has an input/output mechanism in which the user sets the file capacity of an output-only file used when executing a user program. When a user program is executed by connecting a file that does not perform output processing in response to an output request without allocating devices and resources as output information storage means for storing the size of data output in an output information storage area on main memory each time the user program is executed; and a file capacity display means for displaying, on a display device, the file capacity that would be required if the file not subjected to output processing was subjected to output processing, with reference to the size of the data.

[Effect]

In the file capacity determination support method of the present invention, the output information storage means allows the user to connect a file that does not perform output processing in response to an output request without allocating devices or resources as a file structure instead of an output-only file. When the user program is executed, the size of the data to be output is stored in the output information storage area in the main memory each time an executable statement of a data output request is executed for a file that does not perform output processing, This is necessary when the file capacity display means refers to the size of data stored in the output information storage area by the output information storage means at the end of the user program and outputs a file that is not subjected to output processing. Display the file size on the display device.

〔Example〕

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

FIG. 1 is a block diagram showing the configuration of a file capacity determination support system according to an embodiment of the present invention.

The file capacity determination support system of this embodiment consists of a user program 1, an input/output mechanism 2 included in an operating system (not shown), a dummy file 3 that does not perform output processing, a display device 4, and a main memory. The main part consists of 5.

The input/output mechanism 2 includes an output information storage means 21 and a file capacity display means 22.

On the main memory 5, an output information storage area 51 is allocated.

Next, the operation of the file capacity determination support system of this embodiment configured as described above will be explained.

Connected to the user program 1 is a dummy file 3 that is not outputted by the user. The input/output mechanism 2 of the operating system is a user program l.
For example, it is possible to recognize that a dummy file 3 that does not perform output processing is connected instead of an output-only file to the dummy file 3 based on the specification of ξ- made in advance by the user to the operating system, or It is recognized when an executable statement for a dedicated file open request is executed.

When the executable statement of the data output request of the user program 1 is executed, the output information storage means 21 of the input/output mechanism 2 does not perform the data output processing to the dummy file 3, but outputs the main data corresponding to the dummy file 3. In the output information storage area 51 on the memory 5, the number of times the executable statement of the data output request has been executed and the size of the output data are stored as output information.

Then, when the executable statement of the termination request of the user program l is executed, the file capacity display means 22 of the input/output mechanism 2 displays the data corresponding to the dummy file 3 stored in the output information storage area 51 on the main memory 5. When a user creates an output-only file from output information, the file capacity and number of outputs required are displayed on the display device 4.

Therefore, in the debugging stage of user program l, if the user connects dummy file 3 instead of the output-only file and executes user program 1, it is necessary as the output-only file when user program 1 terminates. The file size that would have been displayed will be displayed, and when the user finishes debugging, the user can use the file size displayed when connecting the output-only file to user program 1 and running it. It becomes possible to set a file capacity of an output-only file suitable for the user program l to the operating system.

〔Effect of the invention〕

As explained above, in the present invention, when a user connects a dummy file instead of an output-only file and executes a user program, the dummy file is required as an output-only file when the user program ends. By displaying the actual file size, when the user actually connects an output-only file and runs the user program, the user can select the appropriate size for the user program based on the displayed file size. This has the effect that the file capacity of the output-only file can be set for the operating system.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a file capacity determination support system according to an embodiment of the present invention. In the figure, 1... User program, 2... Input/output mechanism, 3... Dummy file, 4... Display device, 5... Main memory, 21... Output information storage means, 22. - File capacity display means, 51... Output information storage area.

Claims (1)

[Claims] In an operating system having an input/output mechanism in which a user sets the file capacity of an output-only file used when executing a user program, the user can set the file size of a device and resources as a file structure instead of an output-only file. When a user program is executed by connecting a file that does not perform output processing in response to an output request without allocating the output information storage means for storing the size of data outputted to the output information storage area in the output information storage area on main memory; and a file capacity display means for displaying on a display device the file capacity that would be required if the file that is not subjected to output processing was subjected to output processing, with reference to the file capacity determination support method. .