JP2616425B2 - File allocate method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file allocation method, and more particularly to a file allocation method for allocating a file in an information processing system.

[0002]

2. Description of the Related Art Conventionally, when allocating a plurality of files of the same format in an information processing system, a job control language for allocating a file by changing a file name is executed, or a description about the allocation of a file is described in the job control language. Ran a job control language that allocates a file by describing it multiple times.

In such a conventional file allocation method, when allocating a plurality of files of the same format, the job control language is executed by changing the file name, or a description about the file allocation is written in the job control language a plurality of times. Because of the description, it takes time to complete the allocation, and careless mistakes are likely to occur due to the large number of job control language descriptions.

[0004] Therefore, various types of file information that are the basis for allocating files set interactively on the screen are developed in a storage area, and the block length and file capacity required for logically allocating the files are calculated and calculated. A screen interactive file logic setting method for allocating files by creating a job control language for allocating the block length and file capacity described above has already been proposed (see Japanese Patent Application Laid-Open No. 3-43845).

[0005]

In the above-described conventional screen interactive file logical setting method, file information can be set interactively on the screen and a file can be automatically allocated. When allocating a plurality of files in a lump, there is a problem in that file information having the same contents must be repeatedly set for the screen.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to set the number of allocations when inputting file information necessary for allocation in a screen interactive manner, so that a plurality of files of the same format can be allocated collectively. An object of the present invention is to provide a file allocation method as described above.

[0007]

According to the file allocating method of the present invention, screen input / output means for inputting / outputting file information and the number of allocations which are the basis of file allocation in a screen interactive manner; File capacity calculating means for calculating a block length and a file capacity required for allocating a file based on the file information input to the file, and the number of allocates is calculated using the block length and the file capacity calculated by the file capacity calculating means. A job control language creating means for automatically creating a job control language for allocating a file by automatically assigning a serial number to a file name in the case of a plurality of programs, and starting a job control language created by the job control language creating means Allocating means for allocating a file.

The file allocating method according to the present invention is characterized in that an allocating database which manages allocating data and an allocating database having the same file name by searching the allocating database when a file name and the number of allocating are inputted in a screen interactive manner. If there is data, the file information in the allocate data is displayed on the screen, and if there is no corresponding allocate data, the default value is displayed on the screen. File size calculating means for calculating a block length and a file capacity required for allocating a file, and using the block length and the file capacity calculated by the file capacity calculating means to assign a file name when the number of allocates is plural. Allocation of files by automatically assigning serial numbers A job control language creating means for creating a job control language to be executed, allocating a file by activating the job control language created by the job control language creating means, storing the allocate data in the allocate database after execution, Allocating means for setting a default value.

[0009]

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

FIG. 1 is a block diagram showing a configuration of a file allocation system according to an embodiment of the present invention. The file allocating method according to the present embodiment includes a file allocating tool 1, an allocating database 2, and a display device 3.
And an input device 4 and a plurality of files 5 to be allocated
Thus, the main part is constituted.

The file allocating tool 1 includes a screen input / output unit 11 for inputting / outputting file information serving as a source of the allocation of the file 5 in a screen interactive manner, and a screen input / output unit 11.
File capacity calculating means 12 for calculating a block length and a file capacity required for allocating a file based on the file information input by the user and the number of allocations using the block length and the file capacity calculated by the file capacity calculating means 12 When there are a plurality of files, a job control language creating means 13 for automatically assigning a serial number to a file name to create a job control language, and a job control language created by the job control language creating means 13 are activated to start the file 5 File allocating means 14 for allocating a file
It is comprised including.

Referring to FIG. 2, the process of the file allocation tool 1 includes an initial screen display step S101, a file name and allocation number input step S102,
Allocate data search step S103, applicable data existence determination step S104, file information display step S105, default value display step S106, input item value correction step S107, input item value validity check step S108, error existence determination Step S10
9, an error message display step S110, a block length and file capacity calculation step S111, a block length and file capacity display step S112,
Confirmation step S113 and allocation number determination step S
114, a job control language creation step S115, an allocate execution step S116, a status display step S117, and an allocate data storage step S11.
8, a next default value setting step S119, a subscript 1 setting step S120, a file name subscript addition job control language creation step S121, and an allocate execution step S121.
122, status display step S123, allocate data storage step S124, allocate number determination step S125, and subscript increment step S1.
26.

FIG. 3 is a diagram exemplifying a screen displayed on the display device 3. On the screen, the file name, the number of allocates, the file organization, the record length, the key length, the number of records, the block length, the allocate unit, and the file capacity (data part, key part) are displayed. . The data shown in FIG. 3 is stored in the allocate data file 2 as allocate data.

FIG. 4 is a diagram illustrating a job control language for allocating the file 5. 4, LJSA. T
EST. WEJEBOO_IN indicates the file name and FIL
EORG = SEQ indicates file organization, RECSIZE =
361 (byte) is the record length, BLOCKSZ = 2
3465 (byte) indicates the block length, and SIZE = 1 (track) indicates the file capacity. In FIG. 4, since the file organization is the sequential organization, the key length and the key portion are not shown.

FIG. 5 is a diagram exemplifying a processing flow of the file allocation method of the embodiment.

Next, the operation of the file allocating method according to the present embodiment configured as described above will be described.

When the file allocating tool 1 is started, the screen input / output means 11 displays an initial screen as illustrated in FIG. 3 on the display device 3 (see FIG. 5) (step S101).

When the operator inputs a file name and the number of allocates on the initial screen displayed on the display device 3 (step S102), the screen input / output means 11 searches the allocate database 2 for allocate data of the same file name. (Step S103), it is determined whether there is the corresponding allocate data (Step S104). If there is the corresponding allocate data, the screen input / output means 11
The file information (file organization, record length, key length, number of records, and allocation unit) in the allocation data is displayed on the display device 3 (step S105), and if there is no corresponding allocation data, the default value (file organization and allocation unit) ) Is displayed on the display device 3 (step S106).

When the operator corrects input item values (file organization, record length, key length, etc.) from the input device 4 (FIG. 5).
(Step S107), screen input / output means 11
Checks the validity of the input item value (see Figure 5)
(Step S108) If there is an error (Step S1)
09, and an error message is displayed (FIG. 5).
(Refer to step S110), and control is returned to step S107.

If there is no error (No in step S109), the screen input / output means 11
2, the block length and the file capacity are calculated (see FIG. 5) (step S111).

Here, for example, when the file organization is the sequential organization, the calculation of the block length and the file capacity is exemplified.

Assuming that the record length of the record stored in the file 5 is h (byte), the block length n (byte) is represented by the following equation. n = h × N (N is a natural number) (1)

If the maximum capacity of one track is m (bytes), the number of blocks accommodated in one track is [m / n]. Here, [] is a Gaussian symbol (the same applies hereinafter).

Therefore, the data amount f (n) accommodated in one track is represented by the following equation. f (n) = [m / n] × n (2)

If the equation (1) is substituted into the equation (2) and the variable is N, the following equation is obtained. f (N) = [m / (h × N)] × h × N ≦ m (3)

The space efficiency of the magnetic disk becomes highest when the maximum value of f (N) for N is determined. The corresponding values are N _max , n _max and f
Assuming _max , f _max = f (N _max ) = f (n _max ) ≦ m, h × N _max = n _max

The number of records per track at this time is as follows. f _max / h = [m / (h × N _max )] × N _max = [m / n _max ] × n _max / h

Accordingly, when the number of records stored in the file 5 is a, the number of tracks T to which the file 5 is allocated is ah / f when ah / f _max is an integer.
_{When max} and ah / f _max are not integers, [ah / f
_max ] +1.

Next, the file capacity in which the file 5 is allocated is T tracks when one cylinder is not used. When using more than one cylinder,
Assuming that the number of tracks per cylinder is k, the number of used cylinders C is ahk / f when ahk / f _max is an integer.
_{When max} and ahk / f _max are not integers, [ahk /
f _max ] +1.

Accordingly, _Nmax that maximizes f (N) is obtained from the equation (3), and the file capacity T (track) is calculated from this.

Although the above calculation example is for a case where the file organization is a sequential organization, the file capacity (data part, key part) can be calculated by a well-known calculation procedure also for other file organization. Needless to say.

When the block length and file capacity of the file 5 to be allocated are calculated, the screen input / output means 11
Displays the calculated block length and file capacity on the screen of the display device 3 (see FIG. 5) (step S11).
2) Prompt the operator for confirmation (step S113).

When the operator inputs the confirmation from the input device 4 (see FIG. 5), the job control language creating means 13
Determines whether the number of allocates is 1 (step S114), and if the number of allocates is 1, creates a job control language as exemplified in FIG. 4 (step S1).
15), the allocating unit 14 allocates the file 5 (see FIG. 5) (step S11)
6).

When the allocation of the file 5 ends normally, the allocation executing means 14 displays a status indicating the normal end on the display device 3 (see FIG. 5) (step S).
117), the allocate data is stored in the allocate database 2 (step S118), and the next default value (file name, file organization and allocate unit) is set (step S119), and the control returns to step S101.

If the number of allocates is 1 or more at step S114, the job control language creating means 13 sets the subscript to 1 (step S120) and adds a subscript to the file name to create a job control language (step S121). The allocating unit 14 allocates the file 5 (see FIG. 5) (step S122).

When the allocation of the file 5 ends normally, the allocation executing means 14 displays a status indicating the normal end on the display device 3 (see FIG. 5) (Step S).
123), the allocate data is stored in the allocate database 2 (step S124), and it is determined whether or not the subscript matches the number of allocates (step S125).
If the subscript does not match the number of allocates, the allocation executing means 14 increments the subscript by +1 (step S126), returns control to step S121, repeats steps S121 to 124, and in step S125 the subscript matches the number of allocates. Then, control is passed to step S119.
Pass to.

[0037]

As described above, according to the present invention, the screen input / output means, the file capacity calculating means, the job control language creating means and the file allocating executing means are provided, and the necessary file information and the number of allocates are designated interactively on the screen. By doing so, it is possible to collectively allocate a plurality of files of the same format, so that there is an effect that labor for allocating the files can be saved.

Further, an allocate database, a screen input / output means, a file capacity calculating means, a job control language creating means and a file allocating means are provided to display and designate necessary file information and the number of allocates in a screen interactive manner. As a result, a plurality of files of the same format can be collectively allocated, and the effect of allocating files can be saved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a process of a file allocation tool in FIG. 1;

FIG. 3 is a diagram showing an example of a screen displayed on the display device in FIG. 1;

FIG. 4 is a diagram illustrating a job control language created by a job control language creating unit in FIG. 1;

FIG. 5 is a diagram illustrating a processing procedure of a file allocation method according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 File allocation tool 2 Database 3 Input device 4 Display device 5 File 11 Screen input / output means 12 File capacity calculation means 13 Job control language creation means 14 File allocation execution means

Claims (2)

(57) [Claims] 1. Screen input / output means for inputting / outputting file information and the number of allocations from which a file is to be allocated in a screen interactive manner; A file capacity calculation means for calculating a block length and a file capacity required for allocation, and a file number is automatically assigned to a file name when there are a plurality of allocations by using the block length and the file capacity calculated by the file capacity calculation means. Job control language creating means for creating a job control language for allocating a file by assigning a file, and allocating execution means for activating the job control language created by the job control language creating means and allocating the file. File allocating method characterized by that. 2. An allocation database that manages allocation data, and when a file name and the number of allocations are input interactively on the screen, the allocation database is searched, and if there is allocation data having the same file name, the allocation data is stored in the allocation data. A screen input / output means for displaying file information on the screen and displaying a default value on the screen if there is no corresponding allocate data; and a file input / output means required for allocating a file based on the file information inputted to the screen by the screen input / output means. A file capacity calculating means for calculating a block length and a file capacity; and automatically assigning a serial number to a file name when the number of allocates is plural by using the block length and the file capacity calculated by the file capacity calculating means. A job to create a job control language to allocate files Control language creating means; allocating means for activating a job control language created by the job control language creating means, allocating a file, storing allocate data in the allocate database after execution, and setting the default value; File allocating method characterized by having: