JPS61216022A - Information processing system - Google Patents

Abstract

PURPOSE:To a fast information processing system which has high retrieval efficiency by transferring information from the 1st rewritable storage means to the 2nd storage means according to specific conditions. CONSTITUTION:A document is read by a reader 122 and stored in a photomagnetic disk 151. At this time, retrieval indexes corresponding to documents are generated in an index file on a magnetic disk 105. Document data are recorded on the disk 151 one after another and when its capacity of recorded data exceeds the 1st set value, the index file is looked up to transfer document data whose retrieval frequency is <=10 within, for example, the past one year from the optical disk 151 to an optical disk 141. In this case, the index file is also rewritten simultaneously. When the disk 151 has a margin in its memory capacity as a result of the transfer, a document to be stored next is recorded there.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an information processing system for storing and retrieving information.

[Prior art]

In recent years, with the advancement of office automation, electronic file systems using optical disk memories and the like have come to be used as information processing systems that store large amounts of information in a small space and retrieve it at high speed when necessary.

Electronic file systems use high-density, large-capacity disk-shaped memory such as optical disk memory, so they can store information as compactly as microfilm, but at high speeds that microfilm cannot. It is rapidly becoming popular because it is searchable.

On the other hand, information is generally used at a high frequency (search frequency) for a while after it is first generated, and as time passes, the probability of it being searched and used decreases rapidly. be.

After a certain period of time, only a very small portion of all information is used continuously, and most of the remaining information is
Usually, it is simply stored without being utilized.

However, in conventional electronic file systems, a non-rewritable memory medium (hereinafter referred to as write-once memory) is used as an optical disk memory. It is impossible to rewrite the information. That is, new information is simply added to the unrecorded area one after another.

When information is accumulated in a conventional electronic file system with such characteristics, the amount of information that has outlived its useful life gradually increases as time passes, as described above. The density of frequently used information in one disk memory will gradually decrease, and as more information is written, the amount of disk memory will increase. This causes the active information to be searched for to exist across multiple disks.

In the case of optical disk memory, it is possible to randomly access information on the same disk at extremely high speeds with an access time of less than 1 second, but when it is necessary to search among multiple disks, This method has a major disadvantage in that the retrieval speed becomes extremely slow because the disk needs to be replaced.

〔the purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to provide an information processing system that is fast and has high search efficiency.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing an example of a conventional electronic file system. 1 is a microcomputer 11 and RAM for system control.

Internal memory 12) consisting of ROM etc.) External memory 13 consisting of floppy disk or cartridge disk etc. This is a control unit (hereinafter referred to as a workstation) that includes a keyboard 14, a CRT 15, and the like.

2 is a manuscript league that converts the document information of a document placed on a document table into an electrical signal using an imaging device such as a CCD, and 3 is a high-speed printer such as a laser beam printer that forms an image on a recording material based on the information converted into an electrical signal. It is. 4 is an image file in which a large amount of image information can be written and read using a recording medium such as an optical disk. Furthermore, when a document is stored in the image file 4, index information of the document is stored in the external memory (database) 13.

These readers 2) printers 3% image files 4 are connected to the workstation 1. Reference numeral 14 is a keyboard provided on the workstation 1, and by operating this keyboard 14, system operation commands, etc. are issued. 15 is an image information read photoelectrically by the manuscript part 2, or system control. This is a CRT device that displays information etc.

With the above configuration, when a large number of documents are photoelectrically read by the electronic file system reader 2, stored in the image file 4, and output as a hard copy, keywords of the target document are input, The image information is read out with reference to the database (index file) 13 and output by the printer 3.

However, as mentioned above, the optical disk memory of image file 4 can only be appended, and once the information has been written, it cannot be erased and replaced with new information even if it becomes unnecessary. Therefore, it is a pleasure to add information one after another, with information that is frequently used (active information), information that is only occasionally used, and information that is rarely used (inactive information) mixed together. As a result, a large number of disks with poor search efficiency are generated in which active information is scattered among a large amount of inactive information. It is possible to convert the disk in this case by using a disk autochanger, but it is very expensive, so it is generally done by an automatic operation, which is not only very frequent, but also significantly slows down the search speed. It's going to be bad.

FIG. 2 shows a block diagram of an embodiment of the present invention.
is a workstation.

Reference numeral 101 denotes a keyboard through which an operator inputs system operation commands.

102 is a central processing unit (CPU) consisting of a microcomputer (for example, 5aooo manufactured by Motorola);
03 is a read-on memory ROM in which a system control program is written in advance, and the CPU 102
performs control operations according to the program written in this ROMI O3. 104 is random access memory RAM
It is mainly used as a working memory of the CPU 102 and a page memory for storing image signals exchanged between each input/output unit. Reference numeral 105 denotes an external memory consisting of a floppy disk, in which a system control program, a database (index) for image retrieval from image files described in vk, and the like are stored. 120 is a part 122 of the workstation 100 and a printer 12
The reader 122 and the printer 123 constitute a digital copying machine 121. 130 is CRT13
CRT interface for exchanging information with 1, 14
0 is an optical disk interface for exchanging information with an optical disk, and 150 is a magneto-optical disk interface for exchanging information with a magneto-optical disk.

The workstation 100 includes the above keyboard 101,
CPU 102) ROMI 03, RAM 104, floppy disk 105 and each interface 120,
It is composed of 130, 140, and 150. Also, 1
Reference numeral 10 denotes a bus through which signals are transferred between each block within the workstation 100. 141 is addendum 31 (
151 is a rewritable type (E
This is a magneto-optical disk (DRAW).

The document is read by the document reader 122 and stored on the magneto-optical disk 151. At this time, a search index corresponding to each document is created in an index file in the magnetic disk 105. This index file is as shown in number 31. A record number 201 indicates the order in which the documents were recorded, and a record code is generated each time one document is stored on the magneto-optical disk.

202 represents the date when the document was filed, 203
represents the importance or degree of use of the document to be stored, and the value is determined by the user's judgment. In this example, the smaller the numerical value, the higher the rank, but this is not limiting. 204 represents a keyword when performing a key search.

The index of the target document is displayed by comparing it with the keyword input from the keyboard 101.

205 indicates which disk the document is stored on; "O" indicates that the document is stored on a magneto-optical disk; rlJ indicates that it is stored on the first optical disk; "2", r3J , -----, then the second)
206 indicates the track sector number in which the document is stored; 207 indicates how many times the document has been searched since it was filed; It is rewritten every time you search.

FIG. 4 shows the format of the magneto-optical disk tSt in this embodiment. Reference numeral 301 is a magneto-optical disk, which is composed of a plurality of tracks in the radial direction, and each track is composed of a plurality of sectors. 302 is a recording data area in which document data is recorded from the outside. Reference numeral 303 is a management data area, in which management data indicating what is recorded in which sector is recorded from inside. 304 is a first warning area setting value that warns of the limit of the document data recording area, and 305 is a second warning area setting value.

Document data is recorded on the disk one after another, and when the recorded capacity exceeds the first set value 304, the index file shown in Figure 3 is searched, and the document data that meets the preset conditions is optically magnetized. 2 For example, if the number of searches in the past year is 1
If the condition is that data is transcribed less than 0 times to the optical disk, record numbers 500 and 50 in Figure 3 will be obtained.
2 is erased from the magneto-optical disk 151 and becomes the optical disk 1.
41. Repeat this until the memory usage of the magneto-optical disk becomes less than the first set value.This condition is not limited to this, such as transferring the file to an optical disk after one year, or once every six months. Various conditions can be considered, such as moving to an optical disk if no search is made, moving in order of oldest input time, or moving in order of least number of searches during a predetermined storage period.

Alternatively, the rank added when inputting step 203 may be used. Note that when the document data is transferred to the optical disk, the index file is also rewritten accordingly. This transcription work is automatically executed when document recording or retrieval processing is not being performed.

The first set value and the second set value are equal to the first set value! $2
can be set arbitrarily to maintain the set value. The difference between the first set value and the second set value only needs to be equal to several pages of document data, so that even if the first set value is exceeded while the document is being stored, the difference between the first set value and the second set value will be Document data can be reliably stored, eliminating memory errors, and there is no need to re-memorize the document after the above transcription process is performed.In addition, the transcription process can be performed immediately when the first set value is exceeded. Since there is no need to perform the transcription process unattended at night, it is possible to prepare for the next day's input work.

As a result of the transcription process, if the memory capacity of the magneto-optical disk 151 becomes available, the next time a document is stored, the zero document transcribed to the optical disk 141 and stored in the erased portion is compressed and stored. Since the capacity of the erased portion varies when the data is erased,7 the memory can be used more efficiently by selecting and storing the portion with the most suitable capacity.

You can also perform garbage collection to fill in the erased parts.

Light! ! Document data can be transferred directly from the optical disk 151 to the optical disk 141 by synchronizing the reading timing of the magneto-optical disk and the writing timing of the optical disk, but in general, data is transferred via a bitmap memory. It is easier to do so.

Also, this bitmap memory is stored on the magneto-optical disk 151.
It is also used to fill up free memory within the system (garbage collection).

That is, one page or several pages of document data after the free memory is read out, transferred to the bitmap memory, and the document data is written from the free memory. If you repeat this operation, garbage collection will be completed.

Next, the control operation of the CPUIO2 in this example will be explained.

In FIG. 5, when the system is first powered on, a magnetic disk 10, which serves as the system's database,
5 is attached (step l).
If the magnetic disk 105 is installed, the amount of memory used by the magneto-optical disk 151 is determined from the magnetic disk (step 2), and the amount of memory used by the magneto-optical disk 151 is calculated from the magnetic disk.
In step 3), it is determined whether or not the value is larger than a first setting value indicating a warning area for writing to, and if it is smaller than the first setting value, writing of the document is possible. When the operator inputs a command, it is determined whether it is a document input or a search, and if it is a document input (step 4.5), the input REDA
Outputs the Y signal and displays on CRT 131 or League 122, etc. that input is possible (step 6), and League 1
22, the document is stored in the RAM 104, and when the reading is completed, index data (keywords) for search are input from the keyboard 101 (step 7.
8) Alternatively, a card on which a specific keyword has been recorded in advance may be read using a card league, and keywords may be input using multiple cards. When input of the necessary index data is completed, the magneto-optical disk 151 is loaded. If it is installed, the document data read from the league is read from the RAM 104 and stored on the magneto-optical disk (step 11).
), the storage of document data is R if the reading timing of the league and the writing timing to the disk are synchronized.
After writing the 0 document data to the magneto-optical disk 151, which can be done directly without going through the AM 104, index data and memory usage are added to the magnetic disk (
Step 12).

Also, in step 5, when a document is not input, that is, when a document is being searched, a search REDAT signal is output, and the CRT1
31 etc. (step 13), and input a search keyword from the keyboard 101 in order to search for the desired document. After inputting the necessary keywords (step 14.15), the magnetic disk 105 is searched. , the number and list of corresponding documents are displayed on the CRT 131 (step 16.17).

When the operator gives an instruction to narrow down the number of items, steps 14 to 17 are repeated again (step 18). When the document to be searched is determined, it is determined from the index file 105 whether or not the document exists on the magneto-optical disk 151. 19) If the document exists, read the corresponding document from the magneto-optical disk (step 20), and display one document on the CRT 131 according to instructions from the operator (display document, print document, display and print document). , print it out using the printer 123 (steps 21-24), rewrite the search history of the index file (step 25), read out the remaining documents, and repeat steps 21-25 (step 25-1).

Further, if the memory usage amount of the magneto-optical disk 151 is larger than the first set value in step 3, it is determined whether it is smaller than the second set value (step 28), and if it is smaller than the second set value, step 4 Proceeding to step 29, document input is permitted, and if the value is greater than the second set value, document input is prohibited, and a message indicating input time is displayed (step 29).

Then, the index file is searched to determine the documents to be transcribed and their ranking based on the transcription conditions (step 30).
), and if the magneto-optical disk 151 is installed, read the document to be transcribed and store it in the RAM 104 (steps 31, 32), and if the read document requires editing, read the document
The information is displayed on T131 and edited using the keyboard 101 or the like (steps 33 and 34).

Then, select the optical disk that will be the storage destination for the document to be transcribed (step 35).
Disks with free memory may be selected in order starting from 1, or may be selected based on artificial ranks, and various methods are possible. After selecting an optical disk, it is determined whether the optical disk is installed (step 36), and if it is installed, the document data is read from the RAM 104 and written to the optical disk (step 37), and if necessary, written to the magneto-optical disk 151. Perform a one-page collection to fill up the empty memory (step 38.3).
9) and rewrites the index data (step 40), then returns to step 2 and repeats transcription until the condition of step 28 is satisfied.

Also, as mentioned above, check the memory usage of the magneto-optical disk 151, and if it exceeds the first set value, the system will automatically transcribe the document when it is not executing document input or search. You may also have it run,
The flowchart is shown in FIG. That is, in step 51, the magnetic disk is searched and the document to be transcribed is determined.
The data is read from the magneto-optical disk and stored in the RAM 104 (step 52).

After reading the document from the RAM 104 and writing it to the optical disk (step 53), erasing the document from the magneto-optical disk (step 54), and performing garbage collection to fill up the empty space (step 55), since the storage area has changed, the index is The data is rewritten (step 56), and the C
Display on RT131 and notify operator (Step 5)
7).

Furthermore, in the above embodiment, the number of searches in the index data is rewritten each time a document is searched, but as shown in FIG. 7, a search file is created each time a document is searched.
The document to be transcribed may be determined based on this. In other words, in the figure, 401 represents the search number, and the document is 1
One is created each time an item is searched. 402 represents the searched record number, 403 represents the search date,
404 represents the number of searches, and 405 represents the disk number where the document is stored.

Further, although at least one of displaying or printing the retrieved documents is selected in step 21 of FIG. 5, there may be cases where only the number of documents is desired to be known, so steps 19 and subsequent steps may be omitted.

Further, among the information transferred from the magneto-optical disk to the optical disk, information that is frequently searched may be transferred to the magneto-optical disk again to improve search efficiency.

Further, in the above embodiment, only one magneto-optical disk device is used, but if a plurality of these devices are used, the following becomes possible. First, all input information is stored on the first magneto-optical disk, and information that is searched less frequently or that has no input time is transferred to the second magneto-optical disk. If you repeat this, the second
Since the information storage on the magneto-optical disk also increases, the information on the second magneto-optical disk that is searched less frequently or that was input at an older time is further transferred to the third magneto-optical disk. By repeating information transcription in several stages in this way, disks can be created for each search frequency, improving search efficiency. Information that is rarely used can be stored on optical disks.

〔effect〕

As explained above, according to the present invention, by transferring the information in the rewritable first storage means to the storage means of MIj2 according to predetermined conditions, it is possible to increase search efficiency at high speed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional information processing system, FIG. 2 is a block diagram showing an example of the configuration of the present invention, and FIG.
The figure is a flowchart of the index file, and FIG. 7 is a diagram showing another embodiment of the index file. Note that 100 is a workstation, 105 is a magnetic disk, 141 is an optical disk, and 151 is a magneto-optical disk.

Claims (4)

[Claims] (1) a first storage means in which information can be rewritten; a determination means for determining whether or not the information stored in the storage means satisfies a predetermined condition; and control means for controlling the first storage means to transfer information to a second storage means. (2) The information processing system according to claim 1, wherein the predetermined condition is the number of times information is searched. (3) The information processing system according to claim 1, wherein the predetermined condition is a storage timing of information. (4) The information processing system according to claim 1, wherein the predetermined condition is an artificially determined attribute.