JPS63279338A - File reading system - Google Patents

Abstract

PURPOSE:To accelerate the access time to a file device and to read out a file at a high speed by performing the file reading control based on the sorting information provided to a part of the file. CONSTITUTION:A display 16 contains plural (11-13) cache memories and one of these memories is connected to a CRT controller 15 via a memory switch part 14 and displayed on the display 16. A header 20 is provided at the head of a file and the sorting codes are stored in the header 20. The contents of the header 20 are read out before the file is read out and compared with the file sorting information which is presently displayed fore decision whether the file should be read out or not. Thus the reading control of the file is carried out by the sorting information provided to a part of the file. As a result, the file can be read out at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a file reading method, and more particularly, to a high-speed file reading method.

To display the contents of a file on a display device, etc.
In the conventional method, each time a file is read, the medium (floppy disk, hard disk, or optical disk) containing the file is read. in this case,
Since these media have long access times, it takes time to read them. Furthermore, when reading files, in most cases related files (of the same classification) are successively read. For example, when searching for patents using a database of patent publications, it is based on the international classification of patents. Therefore, by putting this classification code at the beginning of the database file, the files that appear next to the classification currently in use are stored in advance from slow files to fast files (RAM) during free time. To speed up the entire system by reading out data from a database and modifying this high-speed file as necessary.Purpose As mentioned above, in the conventional technology, reading out information from a database, etc. is an access process of a file device. It varies depending on the time, and the access time of file devices is generally slow.

File reading was slow. Therefore, the present invention has been made to improve this problem and speed up file reading.

Configuration In order to achieve the above object, the present invention is characterized in that, in an apparatus for reading file information, reading of the file is controlled based on classification information provided in a part of the file. Hereinafter, the present invention will be explained based on examples.

FIG. 1 is a block diagram for explaining one embodiment of the present invention. In the figure, 1 is a display, 2 is a CPU, 3 is a printer, 4 is a bus, and 5 and 6 are files.

5 is a floppy disk (FD), 6 is a hard disk (HD), and 7 is an optical disk (OD).

Files include FDs with different access times.

There are HD and OD, and this file contains information such as the above-mentioned patent publications. The CPU 2 controls the display 1, printer 3, etc. through the bus 4. Conventionally, information in file 5 was stored in a frame on display 1.
The contents of this frame memory are displayed as they are transferred to memory via bus 4 as needed.

FIG. 2 is a diagram showing the configuration of a display device according to the present invention. In the figure, 11 to 13 are cache memories, 14 is a memory switching unit, 15 is a CRT-display controller, and 16 is a display. There was only one cache memory (used as frame memory). However, in the present invention, a plurality of (11 to 13 in the illustrated example)
), one of which is memory switching unit 1.
4 is connected to a CRT controller 15 and displayed on a display 16.

FIG. 3 is a diagram showing an example of the structure of a file according to the present invention. As shown in the figure, a header 20 is provided at the beginning of the file, and a classification code is placed in this (in this example, the International Classification of Patents). . Then, before reading the file, this content is read and compared with the classification of the currently displayed file to determine whether or not to read it.

Figure 4 shows an example of a processing file, and Figure 5 shows the contents of caches 11 to 13.Generally, patent publications etc. are judged on the first page, and if you do not look in detail, it is the second page. If you don't need to look in detail, go to the first page of the first file.For example, if you are looking at a file with a classification code of GO6F, the next file you want to view will also be this GO6F all 6F file. Therefore, using the header classification code shown in Figure 3, find the next GO6F all 6F file, store it in the cache memory in advance, and change the display by simply changing the connection between this cache memory and the CRT-display controller. You can do it with

First, cache 1 the first page of file A.
Put it in 1. This cache 11 is then connected to a CRT-display controller and displayed on the display. While the user is looking at this display, the next page is stored in the cache 12, and the headers of the files are sequentially checked, and the file is classified in the same category as the currently displayed file (G
.

6F) and find the next file (T
) is stored in the cache 13 (state of ■ in Figure 5), and when the user instructs the next page, the cache 12 is connected to the CRT-display controller and this content is stored. indicate. Then, while the user is viewing this content, three pages of the same file are transferred to the empty cache 11 (S in Figure 5).

If the next file is specified, the cache 13 should be displayed (state ◯ in Fig. 5). In this way, information that is considered to be next needed is transferred from slow files to high-speed memory (cache) during bus free time, and the display can be switched simply by changing the memory connection, increasing speed. In this embodiment, classification information is included in the header of the file, and another feature is that the next file to be read is determined based on this information.

Further, in this embodiment, the frame memory of the display device is used as a cache memory, but it may also be provided on the file side. In this case, the CPU reads the file from the high-speed memory, so high-speed reading is possible.

As is clear from the above description, according to the present invention, the access time to a file device can be made faster, and file reading can be made faster.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram for explaining one embodiment of the present invention,
FIG. 2 is a block diagram showing an example of a display device according to the present invention, FIG. 3 is a diagram showing an example of a file structure, FIG. 4 is a diagram showing an example of a processing file, and FIG. 5 is a diagram showing an example of a cache memory. It is a diagram showing the contents. 1...Display, 2...CPU, 3...Printer. 5-6...File, 5...Floppy disk. 6...Hard disk, 7...Optical disk, 11~
13...Cache memory, 14...Memory switching unit. 15... CRT-display controller, 16.
...Display, 20...Header. Patent applicant Ricoh Co., Ltd. Figure 1 Figure 2 Figure 4 Do2

Claims (3)

[Claims] (1) In a device for reading file information, a file reading method is characterized in that file reading is controlled based on classification information provided in a part of the file. (2) The file reading method according to claim (1), characterized in that the file content of information similar to the classification information of the file currently being referred to is transferred in advance to a high-speed memory. (3) A file reading method according to claim (1), characterized in that the contents of the file rendered based on the classification information of the currently referenced file are transferred in advance to a high-speed memory. .