JPH0561785A - File transfer device - Google Patents

Abstract

PURPOSE:To improve the efficiency of a line by suppressing processing time for transfer at an irreducibly minimum while effectively utilizing transferred data in the case of transferring data again after a line fault is generated. CONSTITUTION:A file transfer device 1 is composed of a storage device 3 to store a data file 2, file transmitter 4 to control the transmission of data in the data file 2, and file receiver 5 to control the reception of data in the data file 2. The file transmitter 4 is composed of a data transmitting means 6 to read the data in the data file 2 from the storage device 3 and to transmit the data to the other file transfer device and a transmitted data managing means 7 to manage the number of data under transmitting, and the file receiver 5 is composed of a data receiving means 8 to receive the data transmitted by the other file transfer device and to write the data in the storage device 3 and a received data managing means 9 to manage the number of data under receiving for each other relevant file transfer device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transfer device, and more particularly to a file transfer device for transferring a file consisting of a plurality of data between a plurality of systems.

[0002]

2. Description of the Related Art In a conventional file transfer device, when a line failure occurs and the file transfer is interrupted, the file is transferred again from the first data when the file is retransferred when the line failure is recovered.

[0003]

In the conventional file transfer apparatus described above, when a line failure occurs and the file transfer is interrupted, the file is transferred again from the first data of the file at the time of retransfer when the line failure is restored. Therefore, if a line failure occurs repeatedly on a line with poor line quality, the data must be transferred from the beginning of the file each time, and the already transferred data is wasted and a lot of processing time is required for the transfer. However, there is a problem that the efficiency of the line is reduced.

An object of the present invention is a file capable of effectively using already transferred data at the time of retransfer of data after the occurrence of a line failure, minimizing the processing time for transfer, and improving the line efficiency. To provide a transfer device.

[0005]

SUMMARY OF THE INVENTION A file transfer device of the present invention is a file transfer device for transferring a file consisting of a plurality of data between a plurality of systems, and stores a file to be transmitted and received. A medium, a data transmission unit that reads the file from the storage medium and transmits the file to another system, a transmission data management unit that manages the number of data items being transmitted, and a number of data items being received for each system. And a data receiving unit that receives the data and writes the data to the file. The transmission data managing unit and the reception data managing unit are configured to detect that a line failure has occurred during the transfer of the file. When detected, the transmission data management means and the reception data management means respectively store when the failure is restored. The time of the occurrence of the fault in accordance with the number of the data and the receiving of transmitted and is configured to transmit and receive back from the transmit and receive to have data.

The file transfer apparatus of the present invention stops the transmission when the data transmission means on the transmission system side detects that a line failure has occurred during the transfer of the file, and notifies the transmission data management means of the transmission data. The management means may notify the reception data management means on the receiving system side of the fact that the transmission is started again when the failure is recovered, including the number information of the data for starting the transmission, and the data transmission means may retransmit the data. ..

In the file transfer apparatus of the present invention, when the reception data management means on the receiving system side detects that a line failure has occurred during the transfer of the file, the reception is stopped, and when the failure is restored, the reception system side receives the reception. From the data management means, the transmission data management means on the transmission system side is notified to the transmission data management means on the transmission system side including the number information of the data to start the transmission so that the data is transmitted again. Under the control of, the data for which the transmission should be started may be transmitted.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

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

The file transfer device 1 uses the data file 2
Of the data file 2, a file transmission device 4 that controls the transmission of the data of the data file 2, and a file reception device 5 that controls the reception of the data of the data file 2. Further, the file transmission device 4 comprises a data transmission means 6 for reading the data of the data file 2 from the storage device and transmitting it to another file transfer device, and a transmission data management means 7 for managing the number of pieces of data being transmitted. The file receiving device 5 receives the data transmitted by another file transfer device and writes the data in the storage device 3.
And a received data management means 9 for managing the number of data items being received for each other corresponding file transfer device.

FIG. 2 is a block diagram showing connections of main parts in an operating state of an embodiment of the present invention.

First, it is assumed that the file transfer devices 10 and 20 are operating on the transmitting side and the file transfer device 30 is operating on the receiving side.

On the file transfer device 10 side, a file transmission device comprising a storage device 12 for storing a transmission data file 11 containing data to be transmitted, a data transmission means 13 and a transmission data management means 14 ( 1)
And are displayed. Also, on the file transfer device 20 side,
Transmission data file 2 that contains the data to be transmitted
Storage device 22 storing 1 and data transmission means 23
And a file transmission device (i) including the transmission data management means 24. Further, on the file transfer device 30 side, a storage device 32 for storing a received data file 31 which is received data, and a data receiving means 33.
And the received data management means 34 are displayed.

FIG. 3 is an explanatory diagram showing the stored contents of the received data file stored in the storage device on the receiving side.

31-1 to 31-n are a group of data received for each corresponding system. The contents of 31-i include a record 31-i-0 composed of the file transmission device name i and the number of received data, and records 31-i-1 to 31-ir composed of a received data number and received data. There is.

FIG. 4 is an explanatory diagram showing the storage contents of the transmission data file stored in the storage device on the transmission side.

The content of the transmission data file 11 includes a record 11-0 including the number of transmission data items and records 11-1 to 11-k including a data number and transmission data.

Next, the operation of this embodiment will be described. The connection configuration, names and symbols are as shown in FIG.

FIG. 5 is a flow chart of processing by the data receiving means.

First, in step (hereinafter referred to as S) 1, the file transmission device i is connected. If it is determined in S2 that the connection is completed, then in S3, the number of transmitted data from the received data management means 34 is calculated as the transmission start data number r of the file transmission device i (where the transmission start data number r is the file transmission device concerned). It is acquired as "0" when connecting to the first time, and "when the failure is recovered after the occurrence of a line failure or the like and the file transmitting apparatus is connected," the number of transmitted data at the time of failure ". Succeedingly, in S4, the transmission start data number r previously acquired in S3 is transmitted to the file transmitting apparatus i, in S5, the data transmitted from the file transmitting apparatus i is received, and in S6, it is determined whether the line failure occurs. If it does not occur, it is determined in S7 whether or not the received data is the end, and in S8, the data transmitted by the file transmission device i is set in the received data r, and in S9. Set the transmission start number r to the data number r,
In S10, “1” is added to the transmission start number r, and the process returns to S5 again to receive the next data from the file transmission device i. Next, if a line failure occurs in S6 or if the received data ends in S7, the file transmission device i is disconnected in S11, and in S12, the transmission start number r is first transmitted in S10.
"1" is subtracted from the received data number obtained by adding "1" to the received data number, and the received data number is passed to the received data management means 34 in S13.

FIG. 6 is a flow chart of processing by the received data management means.

First, in step S21, the record 31-i-0 corresponding to the file transmitting device i of the received data file 31 is read,
In S22, it is determined whether or not the record 31-i-0 exists,
If the record 31-i-0 exists, "1" is added to the number of received data in S23 and the number of transmission start data is set to r, and S22 is set.
If the record 31-i-0 does not exist in S24, the transmission start number r is set to "1" in S24, the transmission start number r is passed to the data receiving means 4 in S25, and the data receiving means 4 causes the file transmitting device 4 to transmit in S26. Wait for i to be released, then S27
In step S2, the number of received data items is acquired from the data receiving means 4.
At 8, the number of received data is set in the record 31-i-0.

In the above description, the case where the receiving system side detects that the failure occurred in the line is recovered and the initiative is given to the file transfer device on the receiving side is explained.
On the contrary, it is also possible to give the initiative to the transmitting side and cause the file transfer device on the transmitting side to start the re-transfer.

In this case, when the data transmission means 13, 23 of the file transfer device 10, 20 on the transmission side detects that a line failure has occurred during the transfer of the file, the transmission is stopped, and the transmission data management means. The reception data management means 34 of the file transfer device 30 on the reception side including the number information of the data which notifies the transmission data 14 and 24 and the transmission data management means 14 and 24 starts transmission again when the failure is recovered. It is also possible to configure the data transmission means 13 and 23 to retransmit the data and the data reception means 33 to receive the data according to the above description.

[0025]

As described above, according to the present invention, when a file consisting of a plurality of data is transferred between a plurality of systems, a storage medium for storing a file to be transmitted and received, and a storage medium. A data transmission means for reading a file from another system and transmitting it to another system, a transmission data management means for managing the number of data being transmitted, a reception data management means for managing the number of data being received for each corresponding system, Data reception means for receiving data and writing the data to a file, and when the transmission data management means and the reception data management means detect a failure in the line during the file transfer, the transmission data management means and the reception According to the number of data being sent and received by the data management means, the data can be sent at the point of failure. By retransmitting and receiving from the data that was received and received, the data that has already been transferred can be used effectively when the data is transferred again after a line failure occurs, and the processing time for transfer can be minimized to the minimum. There is an effect that efficiency can be increased.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing connections of main parts in an operating state according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing stored contents of a received data file stored in a storage device on the receiving side.

FIG. 4 is an explanatory diagram showing storage contents of a transmission data file stored in a storage device on the transmission side.

FIG. 5 is a flow chart of processing by the data receiving means.

FIG. 6 is a flow chart of processing by a reception data management means.

[Explanation of symbols]

 1 File Transfer Device 2 Data File 3, 12, 22 Storage Device 4 File Transmission Device 5 File Reception Device 6, 13, 23 Data Transmission Means 7, 14, 24 Transmission Data Management Means 8 Data Reception Means 9 Reception Data Management Means 10, 20 File transfer device (sending side) 11,21 Transmission data file

Claims (3)

[Claims] 1. A file transfer apparatus for transferring a file composed of a plurality of data between a plurality of systems, a storage medium for storing a file to be transmitted and received, and a file for reading the file from the storage medium. Data transmission means for transmitting to the system, transmission data management means for managing the number of the data being transmitted, reception data management means for managing the number of the data being received for each applicable system, and the data Data reception means for receiving and writing in the file, and when the transmission data management means and the reception data management means detect a failure in the line during the transfer of the file, the transmission data management means at the time of recovery from the failure And the number of the above-mentioned data being stored and received by the received data management means, respectively. According to the file transfer device, the data is transmitted and received again according to the data transmitted and received at the time when the failure occurs. 2. When the data transmission means on the transmission system side detects that a line failure has occurred during file transfer, transmission is stopped, the transmission data management means is notified, and the transmission data management means recovers from the failure. The data transmission means retransmits the data by notifying the reception data management means on the receiving system side of the fact that the transmission is started again including the number information of the data for starting the transmission.
File transfer device described. 3. The reception data managing means on the receiving system side stops the reception when it detects that a line failure has occurred during the transfer of a file, and when the failure is restored, the reception data managing means on the receiving system side sends the transmission system. The transmission data management means on the side notifies the transmission data management means of the transmission system side including the number information of the data to start the transmission so that the data is transmitted again under the control of the transmission data management means. 2. The file transfer device according to claim 1, wherein the file transfer device transmits data to start.