JPH03252738A - File managing system - Google Patents

Abstract

PURPOSE:To improve efficiency of access to a file by performing the retrieval of a record by a key file. CONSTITUTION:A key data retrieval means 3 reads out the area relative number 32 of key data by retrieving the key data 33a, 33b from the key file 9, and receives it as the area relative number 7 of the key data, and furthermore, sends out a record relative number 35 in accordance with the area relative number 32 of the key data to a record update means 1 and a record reference means 2 as record relative numbers 8a, 8b. The record update means 1 performs write on the record 36a of a data file 10 having the record relative number 35, and updates the record, and the record reference means 2 reads out the record 36b of the data file 10 having the record relative number 35, and performs record reference. In such a way, the efficiency of access to the file can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file management system, and particularly to a file management system in a computer system equipped with disk files.

[Conventional technology]

Conventionally, the file management methods of basic operating systems for general-purpose minicomputers have been sequential organization,
Three types of organization are managed: relative organization and index order organization. A relative organization file was used to access records using record numbers.

[Problem to be solved by the invention]

The conventional file management method described above has the problem that when updating and referencing records, the records are read sequentially and the target record is searched, which takes a long time to process the task and reduces efficiency. .

An object of the present invention is to provide a file management method that reduces task processing time in record reference and update processing and improves file access efficiency.

[Means to solve the problem]

The file management method of the present invention includes a data file,
In a file management method in which records of the data file are updated and referenced, (A) a key file storing key data of records stored in the data file; (B) key data from the key file; (C) a key data search means for searching and reading an area relative number corresponding to the key data, and sending a record relative number corresponding to the area relative number; (C) an external record update request for updating a record in the data file; a record that sends a key data search request to the key data search means, receives the record relative number sent from the key data search means, and updates the record of the data file specified by the record relative number; (D) receiving a record reference request for referencing a record of the data file from the outside, sending a key data search request to the key data search means, and receiving the record relative number sent from the key data search means; and record referencing means for receiving and referencing the record of the data file specified by the record relative number.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a configuration diagram of a data file and a key file of the file management method shown in FIG.

The file management method shown in FIG.
, a key file 9 in which key data 33a to 33c of records stored in the data file 10 are stored.
, searches the key data 33a to 33c in the key file 9, receives the key data area relative number signal 7 including the key data area relative number 32 corresponding to the key data 33a to 33c, and receives the key data area relative number signal 7. Record relative number signal 8 containing record relative number 35 corresponding to 32
A key data search means 3 that outputs a, 8b, and a record update request signal 4 that updates the record of the data file 10.
from the outside, sends a key data search request signal 5a to the key data search means 3, and receives a key data area relative number signal 7 including the key data area relative number 32 sent from the key data search means 3. A record updating means 1 receives a record relative number signal 8a containing a record relative number 35 having the same number as the area relative number 32 of the key data, and updates the record of the data file 10 specified by this record relative number 35. , data file 1
Upon receiving a record reference request signal 6 for updating the record 0 from the outside, a key data search request signal 5b is sent to the key data search means 3, and the area relative number 32 of the key data sent from the key data search means 3 is received. Receiving the area relative number signal 7 of the included key data, receiving the record relative number signal 8b containing the record relative number 35 having the same number as the area relative number 32 of the key data, and receiving the data specified by this record relative number 35. It consists of a record reference means 2 that refers to records in a file 10.

Next, the operation will be explained.

In FIG. 1, the key file 9 contains record 3 of the relative organization format data file 10, as shown in FIG.
The key information 6a to 36c is developed into key data 33a to 33c having the same area relative number 32 as the record relative number 35 of the data file 10.

Record update means 1 for updating records in data file 10 receives a record update request signal 4 for updating records in data file 10 from the outside, and sends a key data search request signal 5a to key data search means 3. The key data search means 3 searches the key data 3 from the key file 9.
3a, reads out the area relative number 32 of the key data, receives this as the area relative number 7 of the key data,
Further, a record relative number 35 corresponding to the area relative number 32 of the key data is sent to the record updating means 1 as a record relative number signal 8a.

The record updating means 1 writes to the record 36a of the data file 10 having the record relative number 35,
Update that record.

Similarly, the record reference means 2 that refers to records in the data file 10 receives a record reference request signal 6 that refers to records in the data file 10 from the outside, and sends a key data search request signal 5b to the key data search means 3. . The key data search means 3 searches the key data 33b from the key file 9 and searches for the area relative number 32 of the key data.
is read out and received as the area relative number 7 of the key data, and the record relative number 35 corresponding to the area relative number 32 of the key data is sent to the record reference means 2 as the record relative number signal 8b. The record reference means 2 is a data file 10 having a record relative number 35.
The record 36b is read and the record is referenced.

〔Effect of the invention〕

As explained above, since the present invention can search for records using a key file, the task processing time in record update and reference processing is shortened.
This has the effect of improving file access efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a configuration diagram of a data file and a key file of the file management method shown in FIG. ■...Record updating means, 2...Record reference means, 3...Key data search means, 4
...Record update request signal, 5a, 5b...
...Key data search request signal, 6...Record reference request signal, 7...Key data area relative number signal, 8a, 8b...Record relative number signal, 9...Key file, 10...Data file, 32...Key data area relative number, 33a-33c...Key data, 35...
-...Record relative number, 36a to 36c...
··record.

Claims (1)

[Scope of Claims] A file management method comprising a data file and in which records in the data file are updated and referenced, comprising: (A) a key file in which key data of records stored in the data file is stored; , (B) a key data search means for searching key data from the key file, reading an area relative number corresponding to the key data, and sending out a record relative number corresponding to the area relative number; (C) the data file receives a record update request from the outside to update a record, sends a key data search request to the key data search means, receives the record relative number sent from the key data search means, and specifies by the record relative number. record updating means for updating records of the data file that have been searched; A file management method comprising: record reference means for receiving the record relative number sent from the search means and referencing the record of the data file specified by the record relative number.