JPH0540711A - Data transfer system - Google Patents

Abstract

PURPOSE:To improve the efficiency of file transfer by providing identifier showing whether a record is already transferred to the other system or not at respective records and transferring only updated records. CONSTITUTION:A system 1 has identifiers 31-33 at the respective records, which show whether the record within a file 10 is already transferred to the other system or not after updating. At the time of updating the record 12 within the file 10, a data processor 40 simultaneously sets identifier 32 corresponding to the record 12 in the state of being untransferred. A file transferring device 50 detects identification data 32 in the state of being untransferred within the file 10 by checking identifies sends the corresponding record 12 to a file transferring device 51 within the system 2, updates a record 21 within a file 20 and sets identifier 32 in the state of being already transferred. As only the updated record is transferred, efficiency is high and only one-time transfer is needed even when one record is updated plural times until transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transfer system,
In particular, it relates to a data transfer method in a complex system for data processing in an electronic computer.

[0002]

2. Description of the Related Art Conventionally, the techniques of this kind are: Transfer the entire file each time.

2. The transaction data is transferred after the master file is transferred only once in advance.

There is one of the above methods.

[0005]

In the above-mentioned conventional method, With the method of transferring the entire file every time, even if the number of updated records is small compared to the previous transfer time,
Inefficient because it transfers the entire file.

2. In the method of transferring the transaction data after transferring the master file only once in advance, if there are many updates to the same record, the transferred data increases and the efficiency is low.

[0007] There are drawbacks such as.

[0008]

According to the data transfer method of the present invention, an identifier for each record indicating whether the record has been transferred or not transferred to the other system after the record is updated, and when the record is updated, it corresponds to the record. And a file transfer mechanism for transferring only the records in the non-transferred state to the other system at the time of file transfer, and for setting the identifier of the transferred record in the transferred state.

[0009]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, this embodiment comprises a system 1 which is a portable terminal and a system 2 which is a host computer.

After updating the record in the file 10, the system 1 corresponds to the identifier 30 for each record indicating whether the record has been transferred to the other system 2 or not, and the record when the record in the file 10 is updated. It has a data processing mechanism 40 that puts the identifier in the untransferred state, and a file transfer mechanism 50 that transfers only the untransferred record to the other system 2 at the time of file transfer and puts the transferred record identifier in the transferred state. ..

The portable terminal (system 1) transfers the created file to the host computer (system 2) via the line once a day.

When the data processing mechanism 40 updates the record 12 in the file 10, it simultaneously sets the identifier 32 corresponding to the record 12 to the untransferred state. The file transfer mechanism 50 checks the identifier, detects the untransferred identifier 32 in the file 10, and detects the corresponding record 1
2 is sent to the file transfer mechanism in the system 2, the record 21 in the file 20 is updated, and the identifier 32 is set to the transferred state.

In this way, only the record updated on the day is transferred.

[0015]

As described above, according to the present invention, only the updated record is transferred. It is efficient because it does not transfer the entire file.

2. Even if the same record is updated a plurality of times before the transfer, one transfer is sufficient and the efficiency is good. There is an effect.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 system 2 system 10 file in system 1 file 20 in system 2 11, 12, 13 record in file 10 21, 22, 23 record in file 20, 31, 32, 33 corresponding to record 11, 12, 13 respectively Identifier 40 Data processing mechanism 50 File transfer mechanism in system 1 51 File transfer mechanism in system 2

Claims (1)

[Claims] 1. In a complex system including two or more information processing systems connected by a network, when a specific file is transferred from one system to another system, the record is updated and then transferred to the other system. An identifier for each record that indicates whether it has been transferred or not, a data processing mechanism that puts the identifier corresponding to that record into the untransferred state when the record is updated, and only the record in the untransferred state when transferring the file to the other A data transfer method characterized in that only the necessary records in a file are transferred by having a file transfer mechanism that transfers the identifiers of the transferred records to the system and puts them in the transferred state.