JPH02263253A - Pseudo real on-line system - Google Patents

Abstract

PURPOSE:To omit the communication process out of each work program and to simplify and unify each work program by preparing a transmission file into which the data necessary for other computers are written and a transmission part for the transmission file as well as a reception part where the necessary data are received via its own computer and a reception file. CONSTITUTION:Each computer 1 contains various types of work programs 3 and a communication work program 4 together with a transmission file 7 into which the data necessary for other computers are written and a transmission part 8 where the contents described to the file 7 are transmitted to another computer in the prescribed timing. Furthermore a reception part 9 is added to receive the data necessary for its own computer together with a reception file 10 into which the data received at the part 9 are written. Thus a communication process can be omitted from each program 3. As a result, the program 3 can be simplified and unified and at the same time the due processes can be carried out to secure the pseudo real time properties even with the discontinuation of the partner computer or a fault of a communication circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a pseudo-real online system that obtains effects equivalent to those of a real online system.

(Prior Art) An online system is conventionally known as one of the technologies for connecting multiple computers via a communication line.

As shown in FIG. 5, this system includes a plurality of computers 101 and a communication line 102 that connects each computer 101. While operating, each computer 10
1 and performs respective processing, such as screen input/output processing, performance collection processing, etc.

(Problems to be Solved by the Invention) However, the above-described conventional online system has the following problems.

(a) Since each of the business programs 103 and 104 performs online processing, the programs are often complicated. In addition, although the details will vary depending on the business, - for boat fishing, it is necessary to take countermeasures against online failures.

(b) If the communication line 102, transmission procedure, etc. are different,
It is necessary to create multiple programs even though they have the same business content.

(e) When the other party's computer 101 is stopped or the communication line 1
In the event of a failure in step 02, even if the work only involves collecting and inputting results, the work will stop.

In view of the above circumstances, the present invention makes it possible to eliminate communication processing from each business program, thereby making it possible to simplify and unify each business program, and also to eliminate communication processing when the other party's computer stops or when a communication line failure occurs. The purpose of the present invention is to provide a pseudo-real online system that can perform the processing described by each business program even at the same time.

(Structure of the Invention) (Means for Solving the Problems) In order to achieve the above object, a pseudo-real online system according to the present invention is a system in which computers exchange data with each other to process various tasks. Each computer contains a transmission file into which data required by other computers is written, a transmission unit which transmits the contents written in this transmission file to other computers at a predetermined timing, and a transmission unit which receives data required by the own computer. The present invention is characterized in that it is provided with a receiving section for transmitting data, and a receiving file into which data received by the receiving section is written.

(Operation) In the above configuration, the transmitter of each computer transmits the contents of the transmit file to other computers at a predetermined timing, and the receiver of the other computers receives it and writes it to the receive file, creating a pseudo Ensure real-time performance.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a pseudo-real online system according to the present invention.

The pseudo-real online system shown in this figure is equipped with a plurality of computers 1 and a communication line 2 that connects each computer 1, and processes various business programs 3 while supporting communication between each computer 1 at the application level. do.

Each computer 1 is equipped with various business programs 3 and a communication business program 4.
communicates with other computers 1 at regular intervals to exchange data, and also operates various business programs 3 to execute various processes while referring to the data obtained through this communication operation. C the result
It outputs to RT5, various storage devices 6, etc.

The communication business program 4 includes a sending file 7 into which data necessary for processing by another computer 1 is written, a sending program 8 which sends the contents of this sending file 7 to another computer 1, and a sending program 8 which sends the contents of this sending file 7 to another computer 1. It includes a receiving program 9 that receives data (data necessary for the own computer 1), and a receiving file 10 into which the data received by the receiving program 9 is written.

In this case, the sending file 7 and the receiving file 10 each include a control record 11 and a plurality of data records 12, as shown in FIG.

The control record 11 includes a record address Addr indicating the record number and M indicating the maximum record number value.
It has an AX address M ad dr, a write pointer Waddr- indicating a write record number, and a read pointer Raddr indicating a read record number.

Each data record 12 also includes a record address Addr indicating the record number, a data division area where information necessary for the system user to manage the transferred data is written, and data to be transmitted and received data. and a data area in which is written.

Furthermore, the transmission program 8 has a real response mode and a non-real response mode as operating modes, and is activated at predetermined time intervals to determine the current operating mode, the contents of the control record 11 of the transmission file 11, and the receiving side computer. Each data record 12 is cyclically read out according to the state of the data record 1 and supplied to the receiving computer 1.

Also, like the sending program 8, the receiving program 9 has a real response mode and a non-real response mode as operating modes, and when the content of the data record 12 is sent from the sending computer 1, the receiving file 10 Based on the contents of the control record 11 of the transmitter, it is checked whether the transmission contents are the data to be received this time, and based on the result of this check, the contents of the reception file 10 are updated by importing the transmission contents, and the contents of the reception file 10 are updated. It notifies the other side of the data that it is currently receiving.

Further, each business program 3 is the communication business program 4.
It is configured to operate independently from the other computer 1, and when processing requires data from another computer 1, it performs this processing while referring to the received file 1o. Write to send file 7.

Next, the real response mode operation and non-real response mode operation of this embodiment will be explained with reference to FIGS. 3 and 4.

(Real response mode) The sending program 8 uses the read pointer R of the sending file 7.
Next data record 1 of the number indicated by addr
2, this data record 1 is read as shown in FIG.
2 and the read pointer Raddr are sent out as a pair onto the communication line 2, and sent to the computer 1 on the receiving side.

Thereafter, the value of the read pointer Raddr is incremented and the state is set to wait for reception.

Receiving program 9 provided on the receiving side computer 1
compares the value of the read pointer Raddr supplied from the sending computer 1 with the value of the write pointer Waddr of the receiving file 1o in its own program, and these are W a d d r - Rad d r
If the relationship is -=-(1), it is determined that the transmitted data is correct, and the write pointer W a d
The currently received data record 12 is written in the record following the record indicated by dr, and then the value of the write pointer Waddr is incremented. Also, in parallel with this operation, the write pointer at this time W a d d
r and the sent data record 12 to receive file 1
It is paired with data 'OK' indicating that it has been written to 0 and sent to the sending computer 1.

Furthermore, if the above formula (1) is not satisfied, the write pointer W ad dr at this time and the data "NG" indicating that the transmitted data record 12 has been discarded
and is sent as a pair to the sending computer 1.

When the sending computer 1 receives the data "OK" from the receiving computer 1, it sets the read pointer R.
Next data record 1 of the number indicated by addr
2 is read out, and the contents of this data record 12 and the read pointer Raddr are sent out as a pair onto the communication line 2, and sent to the computer 1 on the receiving side. After this,
The value of the read pointer Raddr is incremented, and the state returns to the reception waiting state. Thereafter, each time data "OK" is supplied from the computer 1 on the receiving side, the sending and receiving operations are repeated to sequentially and cyclically read each data record 12 and send it to the computer 1 on the receiving side.

Furthermore, when the receiving computer 1 outputs the data “NG”, the transmitting computer 1 outputs the write pointer Wadd “NG” along with the data “NG”.
is written to the read pointer Raddr, and at the same time, the next data record 12 of the number indicated by this read pointer Raddr is read, and the contents of this data record 12 and the read pointer Raddr are paired and sent over the communication line 2. and sends it to computer 1 on the receiving side. Thereafter, the value of the read pointer Raddr is incremented, and then the device waits for reception again. Thereafter, the above-described operations are repeated to sequentially and cyclically read each data record 12 and send it to the receiving computer 1.

(Non-real response mode) The sending program 8 uses the read pointer Ra of the sending file.
Next data record 12 with the number indicated by ddr
This data record 12 is read as shown in FIG.
and the read pointer Raddr are sent out on the communication line 2 as a pair, and sent to the computer 1 on the receiving side.
send to

After this, the value of the read pointer Raddr is incremented. Below, data “N” is sent from computer 1 on the receiving side.
This transmission operation is continuously repeated until G'' is supplied, and each data record 12 is sequentially and cyclically read out and sent to the receiving computer 1.

Then, when the receiving computer 1 outputs the data "NG", the transmitting computer 1 outputs the data "NG".
The write pointer Waddr that is output with "NG" is written to the read pointer Raddr, and the next data record 12 of the number indicated by this read pointer Raddr is read, and the contents of this data record 12 and the read pointer Raddr are written. are sent as a pair over the communication line 2 and sent to the receiving computer 1.After this, this transmission operation is continued continuously until data "NG" is supplied from the receiving computer 1. Each data record 12 is sequentially and cyclically read repeatedly and sent to the receiving computer 1.

In addition, the computer 1 on the receiving side receives the read pointer Raddr and the data record 12 from the computer 1 on the sending side.
Each time the read pointer Raddr is supplied, the value of the read pointer Raddr is compared with the value of the write pointer Waddr of the receiving file 10 in the own program, and these are calculated as Waddr = Raddr d r −=
-・- If the relationship in (2) exists, it is determined that the transmitted data is correct, and the data record 12 received this time is written to the next record of the number indicated by the write pointer W ad dr. Write pointer W a d
Increment the value of d.

Furthermore, if the above formula (2) is not satisfied, the sending-side computer pairs the write pointer W ad dr at this time with the data "NG" indicating that the transmitted data record has been discarded. Send to 1.

In this way, in this embodiment, the sending program 8 and the receiving program 9 between each computer 1 are activated at regular intervals to exchange data, thereby securing necessary data from each other. Therefore, even when the other party's computer 1 is stopped or the communication line 2 is in trouble, the processing described by each business program 3 can be performed.

Furthermore, since the communication business program 4 is provided separately from the various business programs 3, communication processing can be eliminated from each business program 3, and thereby each business program 3 can be simplified and unified. .

Further, in the embodiment described above, communication between the computers 1 is performed at regular intervals, but this may be performed in batch processing.

In this case, the sending program 8
is stopped, data is accumulated in a transmission file 7, and when a communication command is input, a transmission program 8 is activated to transmit the contents of the transmission file 7 in a real response mode or a non-real response mode.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to eliminate communication processing from each business program, thereby making it possible to simplify and unify each business program. Even in the event of a failure, the processing described by each business program can be performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the pseudo-real online system according to the present invention, FIG. 2 is a schematic diagram showing a detailed format example of the sending file and receiving file shown in FIG. 1, and FIG. FIG. 4 is a schematic diagram for explaining the real response mode operation of the example, FIG. 4 is a schematic diagram for explaining the non-real response mode operation of the same example, and FIG. 5 is a block diagram showing an example of a general online system. It is. 1...Computer 2...Communication line 7...Sending file 8...Sending section (sending program) 9...Receiving section (receiving program) 10...Receiving file

Claims (1)

[Claims] (1) In a system in which computers exchange data with each other to process various tasks, each computer has a transmission file into which data required by other computers is written, and the contents written in this transmission file. The computer is characterized by comprising: a transmitter that transmits data to another computer at a predetermined timing; a receiver that receives data necessary for the own computer; and a receive file in which the data received by the receiver is written. Pseudo-real online system.