JPS62110690A - Large capacity file accessing system - Google Patents

Abstract

PURPOSE:To reduce the number of times of seek in the reading time of a large capacity file by dividing a file area within a disc device into a general area and a large capacity data only area where the large capacity file is stored in continuous addresses. CONSTITUTION:The file area in a disc device 7 is divided into a general file data area controlled by a directory part 8, and a large capacity data only area 10 where the large capacity file, such as an image data at a graphic visual display device, etc., is stored. And the storage of the image data of large capacity at the large capacity file device 7 is performed in such a way that a write is performed on the area 10 where is not controlled by the directory part 8 with the continuous addresses through a disc driver processing part 4, and the number of times of seek in the reading time of an image data file continuous storage part 11 is reduced, and an access time per file can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] C(7) The invention relates to a large-capacity file access method for accessing large-capacity files such as image data files in bitmap display devices, etc. [Prior art] ] FIG. 2 is a block diagram showing a configuration for accessing an image data file in a conventional bitmap display device, in which 1 is a graphic visual display device such as a graphic cathode ray tube, 2 is a frame memory, and 3 is a block diagram showing a configuration for accessing an image data file in a conventional bitmap display device.
4 is a memory for screen control, 4 is a disk driver processing unit, 5 is a normal file other than image data, 6 is an intermediate buffer for disk access, 7 is a disk device, 8 is a directory portion for managing files in the disk device 7, 9 is the file data area in the disk drive [7, 11a
is a storage unit for one image data file in the file data area 9 that is read out and written in parts by the disk driver processing unit 4.

Next, the operation will be explained. Screen control memory 3
The graphic visual display device 1 transfers a part or the whole of the figure developed in the frame memory 2 to the frame memory 2.
Shapes can be displayed on the . In order to save the graphic image data itself as a file, each divided storage section 11 . Writing is performed by dividing the file as shown in FIG. Further, in response to a request to display a file stored in the file data area 9 of the disk device 7 on the graphic visual display device 1, the disk driver processing section 4
Based on the information obtained from the above, the disk head is caused to seek at least as many times as the file is divided, and the MH is sent to the screen control memory 3 via the intermediate buffer 6.
Next, by transferring it to the frame memory 2, one figure was displayed on the graphic visual display device f1.

[Problem that the invention seeks to solve]

Since the conventional large-capacity file access method is performed as described above, there is a problem in that the disk device requires an extremely large number of seeks for accessing one file, resulting in a long access time.

This invention was made to solve the above-mentioned problems, and provides a large-capacity file access method that can reduce the number of seeks and shorten the time required to access one file when accessing large-capacity files. With the goal.

[Means for solving problems]

In the large-capacity file access system according to the present invention, a large-capacity data-only area is provided in the disk device, and seven large-capacity isles are stored at consecutive addresses within the large-capacity data-only area.

[For production]

Since the large-capacity data-only area in this invention is not managed in the directory section, large-capacity files can be stored at consecutive addresses within this large-capacity data-only area, thereby reducing the number of seeks to access large-capacity files. smaller size and shorter access time.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is a graphic visual display device, 2 is a frame memory that determines the color configuration of the screen, 3 is a screen control memory, 4 is a disk driver processing unit, 5 is a normal file, 6 is an intermediate buffer for disk access,
7 is a disk device, 8 is a directory section for managing normal files 5 in the disk device 7, 9 is a file data area provided in the disk device 7, and 10 is a large-capacity data dedicated area provided in the disk device R7 according to the present invention. Area 11 is a continuous storage section for image data files stored in continuous addresses in the large-capacity data exclusive area 10.

Next, the operation will be explained. Screen control memory 3
The relationship between the graphic visual display device 1 remains conventional. Further, the normal file 5 is written to and read from the file data area 9 managed by the directory section 8 as in the conventional case. - 10,000, large-capacity image data is stored in the disk device 7 at consecutive addresses in the large-capacity data dedicated area 11 that is not managed by the directory section 8 via the disk driver processing section 4. The seek time when reading data has been significantly reduced, and as a result, the disk access time that takes up most of the time from when the user issues a command (screen call) until the data is aligned in frame memory 2 has been reduced, and the user interface has been reduced. This will lead to improved performance of 2 Aces.

In the above embodiment, the disk access intermediate buffer 7
6 is shown, but further performance improvement is expected by substituting the screen control memory 3 or increasing the size of the disk access intermediate pack allo.

〔Effect of the invention〕

As described above, according to the present invention, a file area in a disk device is divided into a file data area for storing regular files and a large-capacity data exclusive area for storing large-capacity files. Since data is stored in a dedicated area at consecutive addresses, the number of seeks when reading a large-capacity file is reduced, resulting in the effect of shortening the file access time.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a large capacity file access method according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a general file access method. 1 is a graph ink visual display device, 2 is a frame memory,
3 is a screen control memory, 4 is a disk driver processing section, 5 is a normal file, 6 is an intermediate buffer for disk access, 7 is a disk device 18 is a directory section,
9 is a file data area, and 10 is an area exclusively for large-capacity data. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant: Mitsubishi Electric Corporation (2 others) Fig. 1 2: Frame memory 3: Memories for screen draw l 4: Tis 7 Dry 8 5L 9 and 5" Normally, normal 1 and 6: Tis 7 Rits F@f, 7 Fa 7 Disk device 8: Directory officer p 9 叡, Irunata To 1 or 1 o: Dog customer quantity diet 4 use (tbe 11: Inu-5' Cheetah, I 1) 1 (Movement 1 Old Toe Inner Collar P 2nd

Claims (1)

[Claims] In a large-capacity file access method in which large-capacity files such as image data of a graphic visual display device are accessed from a disk device, the disk device is divided into a file data area for storing regular files and a large-capacity data exclusive area for storing large-capacity files. A large-capacity file access method characterized in that the large-capacity file is divided into two parts, and the large-capacity file is stored in the large-capacity data-dedicated area at consecutive addresses.