JPH01211147A - File transmitting system - Google Patents

Abstract

PURPOSE:To shorten a transmitting time by starting transmission from when a part of receiving data is received in a file transmission to use a repeating file. CONSTITUTION:The transfer unit of data is, for example, the writing unit to a repeating file 4, the received data block is stored into a buffer, and a receiving processing part 15, each time a data block 50a of the prescribed number is received, writes it from a buffer to a repeating file 4. After the writing to a first file 4 is completed, a transmitting processing part 11 retrieves writing reading information 60 and when the non-reading data are present, they are read from the file 4, and transmitted to a transfer destination device. Since the writing time to the file 4 of the number of the same blocks is 1/several of the ordinary receiving time, the next data are received, the writing to the file 4 is executed, the reading processing from the file 4 can be executed, and the stored data in parallel to the receiving can be transmitted. Thus, a transmission time is shortened.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a file transmission method, and an object of the present invention is to shorten the transmission time in file transmission in which received data is received in a relay file and then sent to a transfer destination device. A reception processing unit that writes a predetermined amount of data to the relay file each time it is received, and writes the data in the relay file after the first data of the predetermined amount of data is written to the relay file. and a transmission processing unit that searches for read information, and if unread data exists among the written data, reads it from the relay file and transmits it to the transfer destination device, and every time a predetermined amount of received data is received. The received data is stored in the relay file, and the stored received data is read from the relay file and transmitted in parallel with a series of reception processing of the received data.

[Industrial application field]

The present invention relates to an improvement in a file transmission method for transmitting files via relay files.

In systems such as financial systems in which a center controls a large number of terminal devices installed in remote locations to carry out business operations, prompt maintenance of all terminal devices is required.

For this reason, in recent years, systems have been adopted that automatically perform maintenance by sending maintenance data from the center to each terminal, but in financial systems, the structure consists of a center device, a terminal control device (cluster), and multiple terminal devices. In order to transmit the same maintenance data to multiple terminals, a relay file is provided on the terminal control device.
A method is adopted in which the received maintenance data is transmitted to each terminal in this relay file.

However, in the relay processing in the terminal control device,
Conventionally, all received data is stored in a relay file and then transmitted, which means that reception and transmission are performed serially, which poses the problem of time-consuming transmission from the center to the terminal.

For this reason, a file transmission method that reduces the transmission time in file transmission via a relay file% [Prior art] Figure 5 is a system configuration diagram of a conventional example, and Figure 6 is a conventional relay processing in a terminal control device. It is an explanatory diagram.

In the financial system, the central device is equipped with a mask file, and the terminals installed at each branch perform business while inquiring transaction data from the central device. As such, one terminal control device 3 is provided for each of the plurality of terminals A and B.

Here, for example, if you want to change the load module of a business program that operates terminal devices A and B, you will need to replace the load module or perform correction processing, but since the target is a large number of terminals in remote locations. The changed load module is transmitted from the center device 1 via the terminal control device 3, and the terminal devices A and B perform load module replacement or modification processing based on the received data.

This maintenance data is transmitted by a file transmission means, and the following processing is performed.

(1) At the time of online opening, the version number data of each load module is sent from the center device 1 to each terminal ^,B.

(2) Each terminal A, B compares the version number data of its own load module, and if there is a mismatch (revised version), requests the load module from the terminal control device 3.

(3) In the terminal control device 3, the receiving unit 5 requests the center device 1 for the load module, and the center device 1 reads specified maintenance data from the maintenance data file 2 and sends it to the terminal control device 3. do.

(4) The terminal control device 3 stores the received data in the relay file 4.

(5) On the other hand, after the reception to the relay file 4 is completed, the transmitter 6 reads the maintenance data from the relay file 4 and sequentially transfers it to the requesting terminal, as shown in FIG.

(6) After receiving this in the reception file 8 at the terminals A and B, the maintenance section 7 performs load module replacement processing or modification processing.

The above steps are performed before the start of business, and subsequent business processing is performed using the maintained terminal.

[Problem to be solved by the invention]

As explained above, maintenance data is transmitted to the requesting terminal by file transmission via a relay file, but since files are received and transmitted serially during relay processing in the terminal control device, maintenance data is There is a problem in that it takes time to transfer data.

For example, when transmitting 100 bytes of data at 9,600 bps, the transmission unit is approximately 128 bytes, and it takes approximately 5 minutes to transmit a file between devices due to the exchange of responses between devices and internal processing that is performed for each transfer. I need it.

Therefore, if a message is first received in a relay file and then transferred to a terminal, it will take more than 10 minutes until it is transmitted to the first terminal.

In view of the above problems, it is an object of the present invention to provide a file transmission method that improves the transmission time when transmitting a file via a relay file.

[Means to solve the problem]

In order to achieve the above object, the file transmission method of the present invention uses received data (5
0), each time a predetermined amount of data (50a) is received, a reception processing unit (15) writes the data to the relay file (4), After being written to the relay file, the write/read information (60) of the data in the relay file is searched, and if unread data exists among the written data, it is read from the relay file and sent to the destination device. A transmission processing unit (11) for transmitting data is provided.

[For production]

For example, if the unit of data transfer is a block (for example, 128 bytes), which is the unit of writing to the relay file 4,
The received data blocks are stored in a buffer (main memory), and the reception processing unit 15 stores a predetermined number of data blocks (
Each time a predetermined amount of data) 50a is received, it is written to the relay file 4 from the buffer.

After the first write to the relay file 4 is completed, the transmission processing unit 11 searches the write/read information 60, and if there is any unread or unsent data, it reads it from the relay file 4 and transfers it to the transfer destination device (hereinafter referred to as the terminal). ).

Since the writing time to the relay file 4 with the same number of blocks is usually a fraction of the reception time, the data from the relay file 4 is written between the reception of the next data and the writing to the relay file 4. Read operations can be performed, and stored data can be transmitted in parallel with reception.

As described above, transmission starts when a predetermined number of data blocks 50a are received, and if the transmission speeds of reception and transmission are the same, it is possible to send data to the terminal almost in parallel with reception, with only a delay of the predetermined number of blocks. can.

In addition, when transmitting to a plurality of terminals, data is read from the relay file 4 for each terminal after the second terminal, and file transmission is performed.

〔Example〕

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

FIG. 2 is a block diagram of the terminal control device of the embodiment, FIG. 3 is a time chart of the embodiment, and FIG. 4 is a relay processing flowchart.

FIG. 2 shows a block diagram of a terminal control device as a relay device, where 4 is a relay file, 10 is a communication control unit that communicates with the terminal devices (A, B),
Reference numeral 11 denotes a transmission processing unit, which includes a file transmission means for reading and transferring maintenance data from the relay file 4 to the requesting terminals A and B. Reference numeral 12 denotes a main memory, which reads the received data and the relay file 4. 13 is a main control unit that temporarily stores the transmitted data; 13 is a main control unit;
and one that instructs the reception processing unit 15 to transmit a file,
14 is a communication control unit that controls communication with the center device 1; 15 is a reception processing unit that performs reception processing to be described later on data transmitted from the center device 1; 16 is a control table provided in the relay file 4; Then, the write pointer WP and the read pointer I? are used as the write/read information 60. It stores P.

The terminal control device configured as described above performs the relay processing operation shown below. Refer to FIGS. 3 and 4. A transmission request for a predetermined load module requested by a plurality of terminals A and B is sent to the center device 1 via the terminal control device, and based on this, the file transmission of the corresponding load module is performed. Begins.

[Reception processing]

(1) When reception is started, the main control unit 13 continuously outputs the control table 16 and initializes the write pointer KP and read pointer RP.

(2) The communication control unit 14 transfers the received data to the main memory 12.
When a predetermined number of data blocks 50a are received, the reception processing unit 15 reads the control table 16, and refers to the write pointer row to write to the relay file 4 by specifying, for example, a physical block address. , requests multiple blocks to be written in succession.

(3) After the writing to the relay file 4 is completed, the reception processing unit 15 adds the write pointer P by the number of write blocks, updates the control table 16 of the relay file 4, and then notifies the main control unit 13 of the completion. do.

(4) This open data is being received, and each time a predetermined number of data blocks 50a are received, the above (2) is performed.

The operation (3) is repeated.

Note that at the end of the series of received data 50, there is a data end EO.
D is listed.

[Transfer processing]

When notified of the completion of the first write to the relay file 4, the main control unit 13 instructs the transmission processing unit 11 to start transmission together with the requesting terminal name.

The transmission processing unit 11 creates a queue table 17 in the order of requests, and performs the following transmission processing to the first terminal.

(1) Read the control table 16, compare the write pointer row and the read pointer RP, and if they do not match, read the specified number of data blocks from the relay file 4 continuously from the read pointer RP to the write pointer WP. Transfer to memory 12.

Note that if the write pointer HP and the read pointer RP are partially connected, the control table 16
Read and compare.

(2) Add the read pointer RP according to the number of successive blocks and update the control table 16.

(3) The communication control unit 10 transmits the data transferred to the main memory 12 to the terminal in transfer block units.

(4) When the data transfer on the main memory 12 is completed, the operations (1) to (3) above are repeated, and when the data end EOD is detected, the transmission process to the terminal is completed.

(5) Refer to the queue table 17, and if there is a next requesting terminal, perform the above transmission process.

As described above, transmission to the terminal is started when a predetermined number of data blocks 50a are received from a series of received data 50, and if the reception and transmission transmission speeds are the same, the reception processing unit 15 and the transmission processing unit 11 File accesses from and to files are performed without conflict, and transmission ends with a delay of a predetermined number of blocks after reception ends.

In the above embodiment, the control table 16 may be provided in a common area on the main memory 12 instead of the relay file 4.

As described above, each time a predetermined amount of data 50a is received, it is written to the relay file 4, and transmission to the terminal starts after the first writing to the relay file 4 is completed, so reception and transmission are generally This can be done in parallel, and the transmission time of file transmission using the relay file 4 can be significantly shortened.

〔Effect of the invention〕

In file transmission using a relay file, the present invention provides a file transmission method in which transmission starts when a part of received data is received, and therefore the effect in reducing transmission time is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a block diagram of a terminal control device according to an embodiment, Fig. 3 is a time chart diagram of the embodiment, Fig. 4 is a relay processing flowchart, and Fig. 5 is a diagram of a conventional example. System configuration diagram: FIG. 6 is an explanatory diagram of conventional relay processing in a terminal control device. In the figure, 1 is a center device, 2 is a maintenance data file, 4 is a relay file, 10.14 is a communication control unit, 11 is a transmission processing unit, 12 is a main memory, 13 is a main control unit,
15 is a reception processing unit, 16 is a control table, 17 is a queue table, 50 is received data, 50a is a predetermined amount of data, a predetermined number of data blocks, 6
0 is write/read information, WP is a write pointer, and RP is a read pointer.

Claims (1)

[Scope of Claims] In a relay device that stores received data (50) in a relay file (4) and then reads it from the relay file and transmits it to a transfer destination device, when receiving the received data (50), a predetermined amount of data is stored in the relay file (4). Data of(
a reception processing unit (15) that writes to the relay file (4) every time it receives the data (50a);
After the first data in a) is written to the relay file, the write/read information (60) of the data in the relay file is searched, and if there is unread data among the written data, the data is checked. A transmission processing unit (11) is provided which reads the relay file and transmits it to the transfer destination device, and each time a predetermined amount of received data is received, the relay file (4) is read out from the relay file and transmitted to the transfer destination device.
), and in parallel with a series of reception processing of the received data, the stored received data is read from the relay file and transmitted to the transfer destination device.