JPH11272478A - Synchronous transfer control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unnecessitate the re-output of an output job, and to unnecessitate the re-activation of an input job when one or plural input jobs operate the intermediate extraction of data and the repeated input of arbitrary data in synchronous transfer control for shortening a processing executing time by executing a data output job and a data input job in parallel. SOLUTION: A synchronous transfer controlling means 1 for operating data transfer is provided with a temporary file 14 for storing inter-job succession data, temporary file input/output controlling parts 12 and 10, and repositioning controlling part 11. The temporary file output controlling part 10 stores data which are being transferred in the temporary file 14 in parallel, checks whether or not target data are present in a transfer buffer when the repeated input of arbitrary data from an input job is requested, and re-inputs the already stored data to the temporary file 14 as necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous transfer control method for data in a data processing system, and more particularly to a data transfer method for transferring data from an output job to an input job in parallel to reduce data processing time. And a synchronous transfer control method.

[0002]

2. Description of the Related Art A data synchronous transfer control method according to the prior art is to execute a data output job and a data input job in parallel and realize data takeover between jobs by data transfer by a data transfer pipe function. Thus, the batch processing time can be reduced. Since the data transfer pipe is simply a data transfer path having no input / output data storage structure, the above-described prior art is limited in its application range only to the task of sequentially processing data.

As another prior art, synchronous transfer control of data with a backup function for storing data on an external recording device at the same time as data transfer is known. Since the saved data on the external recording device cannot be reused before the completion of the job, if the job requires re-input of data, it is necessary to re-input the data after the data output job is completed, Cannot be shortened.

[0004]

The prior art described above is
The data output job and the data input job are executed in parallel, and the data transfer between the jobs is focused on reducing the execution time by data transfer. No consideration has been given to what to do and how to repeatedly input arbitrary data, and in such a case, the data must be output again or the input from the data file must be directly started again. have.

SUMMARY OF THE INVENTION An object of the present invention is to solve one or more of the problems of the prior art, and to execute one or more data output jobs and data input jobs in parallel to reduce the processing execution time. When the input job of the input job takes out data in the middle and repeatedly inputs arbitrary data, it is not necessary to re-output the output job, and it is not necessary to restart the input job. It is an object of the present invention to provide a data synchronous transfer control method which can shorten the processing execution time in the task of extracting data halfway and repeatedly inputting arbitrary data.

[0006]

According to the present invention, there is provided a synchronous transfer control system for transferring data from an output job to one or a plurality of input jobs. This is achieved by providing a temporary file input / output unit that stores data being transferred in a temporary file in parallel and re-inputs data that does not exist in the data transfer buffer from the temporary file to the input job.

Further, the object is to provide, as the temporary file input / output means, a temporary file output buffer for storing in a temporary file in addition to the data transfer buffer;
A temporary file input buffer for inputting data from the temporary file to the input job, and outputting data from the output job to the temporary file via the temporary file output buffer in response to start-up and execution delay of the input job This is achieved by:

Further, the object is that the input job is:
This is achieved by inputting data from the data transfer buffer and inputting data in the temporary file via the temporary file input buffer when the data transfer buffer becomes empty.

That is, according to the present invention, in a data transfer in which the data output job and the data input job are executed in parallel, and the data transfer between the jobs is performed by the data transfer to reduce the execution time, the data transfer by the input job is performed. A temporary file for storing takeover data between jobs, a temporary file input control unit, and a repositioning control unit are provided in the data transfer path in order to enable extraction and repeated input of arbitrary data. The temporary file input control unit stores the data being transferred in a temporary file in parallel, and the repositioning control unit stores the target data in the data transfer buffer when the input job repeatedly requests input of any transferred data. The temporary file input control unit controls whether the data stored in the temporary file is re-input via the temporary file input buffer if it does not exist in the data transfer buffer. The input of the data input to the transfer buffer to the input job is the same as that of the prior art.

The present invention also provides a temporary file output buffer for storing a temporary file for an output job, in addition to a conventional data transfer buffer, in order to eliminate the waiting for an output job and an input job in inputting / outputting the temporary file. And a temporary file input buffer for inputting from a temporary file for an input job. The temporary file output buffer for storing the temporary file is controlled so as to continuously output the data of the output job to the temporary file in response to the delay of the start and execution of the input job, and to eliminate the waiting of the output job. Further, according to the present invention, when the output job completes outputting the data of the output job to the temporary file using the temporary file output buffer for storing the temporary file, the output job is completed.

Further, the temporary file input buffer for the input job operates to input data from the temporary file in response to an input request from the repositioning control unit, and to transfer the data to the input job halfway.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a synchronous transfer control system according to the present invention.

FIG. 1 is a block diagram showing the structure of a synchronous transfer control means according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the structure of a transfer synchronization management table, and FIG. 3 is for explaining the structure of a transfer buffer management table. FIGS. 4 and 5 are diagrams illustrating a method of using a buffer, FIG. 5 is a diagram illustrating a configuration of a temporary file management table, FIG. 6 is a flowchart illustrating a processing operation of data output control, and FIG. 8 is a flowchart illustrating the processing operation of the temporary file output control unit, FIG. 9 is a diagram illustrating the processing operation of the repositioning control, and FIG. 10 illustrates the processing operation of the temporary file input control unit. It is a flowchart. In FIG. 1, 1 is a synchronous transfer control unit, 2 is a data output control unit, 3 is a data input control unit, 4 is a parallel data transfer synchronous control unit, 5 is a data transfer buffer, 10 is a temporary file output control unit, and 11 is Repositioning controller, 12
Is a temporary file input control unit, 13 is a temporary file input buffer, 14 is a temporary file, 15 is a temporary file output buffer, 20 is an output job, 30 is an input job, 40
Is a transfer synchronization management table, 50 is a transfer buffer management table, and 60 is a temporary file management table.

In one embodiment of the present invention shown in FIG. 1, output data from an output job 20 is input to an input job 30 via a synchronous transfer control unit 1. Then, the output job 20 has an O for opening the data set.
PEN macro 21, WRITE requesting data output
It comprises a macro 22, a CHECK macro 23 for checking the completion of output, and a CLOSE macro 24 for closing a data set. Also, the input job 30
A OPEN macro 31 for opening a data set, a READ macro 32 for requesting input of data, a CHECK macro 33 for checking completion of input, a POINT macro 34 for instructing repositioning of data as necessary, and a data set. Is configured by a CLOSE macro 35 that closes Note that the names of the macros constituting each of the above-described jobs are merely examples, and have different names depending on the execution system.

The synchronous transfer control means 1 includes a data output control section 2, a data input control section 3, a parallel data transfer synchronization control section 4, a data transfer buffer 5, a temporary file output control section 10, a repositioning control section, It comprises a unit 11, a temporary file input control unit 12, a temporary file input buffer 13, a temporary file 14, and a temporary file output buffer 15. Each functional unit shown by a thick line in the synchronous transfer control means 1 is newly provided according to the present invention.

Next, the configuration of various tables used in the embodiment of the present invention will be described prior to the description of the embodiment. Each of these tables is provided in the parallel data transfer synchronization control unit 4 so as to be accessible from each control unit 4, but if it is accessible from each control unit, it is provided anywhere in the synchronous transfer control unit 1. Is also good.

The transfer synchronization management table 40 shown in FIG.
This is a table managed by the parallel data transfer synchronization control unit 4, and is an entry 41-1 for each job that processes transfer data.
To 41-3. Each entry includes a job name 41 for identifying a job, an access type 42 indicating an input / output mode such as input and output, a record number 43 for identifying a record having data being processed, and a storage location of the processed record. It comprises a pointer 44 in the data transfer buffer 5 and a state 46 indicating the state of the job. The status 46 includes an unopened 46-1 indicating that the opening of the data set is not completed, an OPEN 46-2 indicating that the opening of the data set is being processed, a buffer empty wait 46-3 waiting for the data transfer buffer 5 to be empty, and a data set. During closing process 46-4, indicating that the closing of the data set has been completed 46, indicating that the closing of the data set has been completed 46
-5 and so on. The contents of the state 46 may be slightly different depending on the processing method.

The transfer buffer management table 50 shown in FIG.
Is a table for managing the states of the data transfer buffer 5, the temporary file output buffer 15, and the temporary file input buffer 13, and includes an entry 51-1 for managing the data transfer buffer 5, and an entry 51- for managing the temporary file output buffer 15. 2. It is composed of an entry 51-3 for managing the state of the temporary file input buffer 13. In the embodiment of the present invention, the data transfer is controlled using three types of transfer buffers. Therefore, the transfer buffer management table 50 is composed of three entries. When the number increases, it can be dealt with by increasing the number of corresponding entries.

Each entry 51- in the table 50
Reference numerals 1, 51-2, and 51-3 denote a record number 52 representing a stored record number, and a pointer 5 representing a pointer of a record in each transfer buffer described later with reference to FIG.
3. The record number 52 is composed of a head 52-1 representing the number of the first record in the buffer and a last 52-2 representing the number of the last record.
The pointer 53 includes a head 53-1 indicating the head pointer 55 of the buffer and an input 53 indicating the input pointer 56.
-2, an output 53-3 representing the output pointer 57, and a final 53-4 representing the final pointer 58.

Each of the data transfer buffer 5, the temporary file output buffer 15, and the temporary file input buffer 13 has a head pointer 55 indicating the head of the buffer and an input pointer 5 for inputting, as shown in FIG.
6. It is managed by an output pointer 57 for outputting and a final pointer 58 indicating the end of the buffer. These pointers have been described as the pointer 53 with reference to FIG. When a plurality of input jobs exist at the same time, it can be dealt with by setting a plurality of input pointers 56.

The temporary file management table 60 shown in FIG.
Is a table for managing the temporary file 14, and is composed of a final output record number 61 indicating the record number last output to the temporary file 14, and a state 62 indicating the processing state of the temporary file 14. The state 62 is a non-OP indicating that the temporary file 14 is not opened.
EN 62-1, OPEN 62-1 indicating an open state, output 62-3 indicating a data output, CLOSE 62-4 indicating a close process, CLOSE completed 62-5 indicating a close completion, and the like. is there.

In the embodiment of the present invention configured as described above, when the OPEN macro 21 is issued from the output job 20, the data output control unit 2 in the synchronous transfer control means 1 receives the OPEN macro 21, and Control is passed to the parallel data transfer synchronization control unit 4. The parallel data transfer synchronization control unit 4 creates an entry of the output job 20 in the transfer synchronization management table 40 shown in FIG. 2, and sets a job name 41, an access type 42, and a state 46. In addition, CLO
When the SE macro 24 is issued, the entry of the output job 20 in the transfer synchronization management table 40 is released.

When a WRITE macro 22 requesting data output is issued from the output job 20, control is passed to the data output control unit 2 in the synchronous transfer control means 1, and
The data output control unit 2 calls the parallel data transfer synchronization control unit 4. The parallel data transfer synchronization control unit 4 includes an access type 42, a record number 43, a state 46, and a pointer 44 of the data transfer buffer 5 in the transfer synchronization management table 40.
It is determined whether or not the corresponding data can be stored in the data transfer buffer 5 based on the above information, and the result is reported to the data output control unit 2.

When data can be stored in the data transfer buffer 5, the data output control unit 2 stores the data in the data transfer buffer 5 and reports the fact to the parallel data transfer synchronization control unit 4. Parallel data transfer control unit 4
Registers that fact in the transfer synchronization management table 40. The detailed processing operation related to data output will be described later with reference to FIG.

On the other hand, when the OPEN macro 31 is issued from the input job 30, control is transferred to the parallel data transfer synchronization control unit 4 in the synchronous transfer control means 1, and the parallel data transfer synchronization control unit 4 An entry of the input job 30 is created in the table 40, and a job name 41, an access type 42, and a state 46 are set. When the CLOSE macro 35 is issued, the transfer synchronization management table 40
The entry of the input job 30 in is canceled.

When a READ macro 32 for requesting data input is issued from the input job 30, control is passed to the data input control unit 3 in the synchronous transfer control means 1, and the data input control unit 3 The data transfer synchronization control unit 4 is called. The parallel data transfer synchronization control unit 4 stores the access type 42 and the record number 4 in the transfer synchronization management table 40.
3, the state 46, based on the information of the pointer 44 of the data transfer buffer 5, determines whether or not the corresponding data is stored in the data transfer buffer 5, and reports the result to the data input control unit 3.

When data is stored in the data transfer buffer 5, the data input control unit 3 transfers the data from the data transfer buffer 5 and reports the fact to the parallel data transfer synchronization control unit 4. Parallel data transfer synchronization controller 4
Registers that fact in the transfer synchronization management table 40. The detailed processing operation related to data input will be described later with reference to FIG.

When the input job 30 issues a POINT macro 34 for instructing repositioning of data,
Control is passed to the repositioning control unit 11 in the synchronous transfer control means 1. The repositioning control unit 11 executes different processing depending on the states of the data transfer buffer 5 and the temporary file input buffer 13. The detailed processing operation of this repositioning processing will be described later with reference to FIG. In the embodiment of the present invention, a temporary file 14 for temporarily storing data is provided in the synchronous transfer control means 1 for repositioning and inputting data. Temporary file output buffer 15, temporary file output control unit 10 for controlling output to temporary file 14, temporary file input buffer 13 for input to temporary file 14, temporary file input for controlling input to temporary file 14 A control unit 12 is provided.

Next, with reference to the flow shown in FIG. 6, a processing operation at the time of outputting data from an output job will be described.

(1) When the WRITE macro 22 is issued from the output job 20 and the data output control unit 2 is called, the data output control unit 2 reads the entry 51-1 of the data transfer buffer entry 51-1 of the transfer buffer management table 50. By comparing the output pointer 53-3 with the final pointer 53-4, it is checked whether or not the data transfer buffer 5 is full (step 70).

(2) If the data transfer buffer 5 is not full at the check in step 70, the data output control unit 2
Stores the data output together with the WRITE macro 22 in the data transfer buffer 5, and the parallel data transfer synchronization control unit 4 sets the output pointer 53- of the data transfer buffer entry 51-1 in the transfer buffer management table 50.
3 is updated (steps 71 and 72).

(3) Thereafter, the parallel data transfer synchronization control unit 4 sets the input entry 41-
2 is checked to see if the input job 30 is in the idle state 46-3 of the data transfer buffer 5, and if it is the idle state 46-3 of the data transfer buffer 5, this standby state is released. (Steps 73 and 74).

(4) After the process of step 74, or when the input job 30 is not the waiting for empty space 46-3 of the data transfer buffer 5 in step 73, the data output to the temporary file 14 is started. The temporary file output control unit 10 is released from the waiting state (step 75).

(5) If the data transfer buffer 5 is full as a result of the check in step 70, it is determined whether all the records in the data transfer buffer 5 have been input or not by the input pointer 53- in the transfer buffer management table 50. (Step 7)
6).

(6) If all the records in the data transfer buffer 5 have already been input in the check in step 76,
After initializing the data transfer buffer entry 51-1 of the transfer buffer management table 50, the process proceeds to step 71 to continue the process of storing data in the data transfer buffer 5 (step 77).

(7) If all the records in the data transfer buffer 5 have not been input in the check in step 76, the entry 41- in the output of the transfer synchronization management table 40
The state 46 of 1 is set to the buffer empty wait 46-3 to wait for output. When the waiting is released, the processing is continued from the head of the data output processing (step 78).

Next, the processing operation when a data input request is made from an input job will be described with reference to the flow shown in FIG.

(1) When a READ macro 32 is issued from the input job 30 and the data input control unit 3 is called, the data input control unit 3 sets the requested record number in the data transfer buffer of the transfer buffer management table 50. It is checked whether or not the entry 51-1 is between the beginning 52-1 and the last 52-2 of the record number 52 (step 80).

(2) If it is determined in step 80 that the requested record number is in the data transfer buffer 5,
The corresponding record is input from the data transfer buffer 5, and the input pointer 5 of the entry 51-1 of the data transfer buffer in the transfer buffer management table is indicated in order to indicate the input.
3-2 is updated (steps 81 and 82).

(3) If the requested record number is not found in the data transfer buffer 5 in the check in step 80, the requested record number and the start of the data transfer buffer entry 51-1 of the transfer buffer management table 50 Compare with record number 52-1 (step 8)
5).

(4) If the requested record number is larger than the first record number in the check in step 85,
Since this record has not been input to the data transfer buffer 5, the input entry 4 of the transfer synchronization management table 40
The state 46 of 1-2 is set to the buffer empty wait 46-3, and the data input control unit 3 is set to the wait state. When the waiting state is released, the process returns to step 80 to continue the data input process from the beginning (step 89).

(5) If the requested record number is smaller than the first record number in the comparison of the requested record number in step 85 with the first record number 52-1 of the entry 51-1 of the data transfer buffer, Since the file is already stored in the temporary file 14, it is checked whether or not the requested record is stored in the temporary file input buffer 13. This check is
Requested record number, first record number 52-1 and last record number 52-2 of entry 51-3 of temporary file input buffer of transfer buffer management table 50
(Step 86).

(6) In the check in step 86, the requested record number is stored in the temporary file input buffer 1
3 is input, a record is input from the temporary file input buffer 13 and the input pointer 53-2 of the entry 51-3 of the temporary file input buffer of the transfer buffer management table 50 is updated. (Steps 87 and 88).

(7) After the end of the processing in step 88 or the end of the processing in step 82 described above, it is determined whether or not the data output control unit 2 is in the output waiting state in the output entry 41-1 of the transfer synchronization management table 40. It is determined whether or not the state 46 is the buffer empty wait state 46-3. If the state is the output wait state, the output wait state is released and the processing is terminated, and the data output control unit 2 is not in the output wait state. If
The processing ends as it is (steps 83 and 84).

(8) If it is determined in step 86 whether the requested record number is stored in the temporary file input buffer 13 or not, the requested data is stored in the temporary file 4. Temporary file 14
To input a record from the transfer management table 50
The requested record number is stored in the first record number 52-1 of the temporary file input buffer entry 51-3 of
The last record number 52-2 and the input pointer 53-2 are initialized, and the waiting state of the temporary file input control unit 12 is released. Thereafter, returning to the processing from step 80, when the record corresponding to the temporary file input buffer 13 is input from the temporary file 14, the temporary file input control unit 12 executes the data input processing (step 90).

Next, the processing operation of the temporary file output control unit 10 will be described with reference to the flow shown in FIG. In addition,
This processing is started in step 75 described with reference to FIG.

(1) When the process shown in FIG. 8 is started, it is determined whether or not there is a record to be output to the temporary file 14. This determination is based on the final output record number 43 of the output job entry 41-1 of the transfer synchronization management table 40.
This is performed by comparing the final output record number 43 of the entry 41-3 of the temporary file output. If the final output record number 43 of the output job entry 41-1 of the transfer synchronization management table 40 is larger than the final output record number 43 of the temporary file output entry 41-3, there is an output record to the temporary file 14. . As a result of this determination, the output record is
If not, the process ends (step 100).

(2) If it is determined in step 100 that there is an output record in the temporary file 14, it is checked whether the temporary file output buffer 15 is full. This check is performed in the transfer buffer management table 5
When the output pointer 53-3 of the entry 51-2 of the temporary file output buffer 0 and the final pointer 53-4 are the same, it can be determined by determining that the temporary file output buffer 15 is full ( Step 101).

(3) If it is determined in step 101 that the temporary file output buffer 15 is full, the temporary file
Output the contents of Thereafter, the final output record number 61 of the temporary file management table 60 is updated, the record number 52 and the pointer 53 of the entry 51-2 of the temporary file output buffer of the transfer buffer management table 50 are initialized, and the process is terminated (step 102). To 104).

(4) If it is determined in step 101 that the temporary file output buffer 15 is not full, the corresponding record in the data transfer buffer 5 is transferred to the temporary file output buffer 15 and the transfer buffer management table 50 The record number 52 and the output pointer 53-3 of the entry 51-1 of the data transfer buffer and the entry 51-2 of the temporary file output buffer are updated, and the process ends (steps 105 and 106).

Next, the processing operation of the repositioning control section 11 will be described with reference to the flow shown in FIG. This process
It is activated by issuing a POINT macro 34 from the input job 30.

(1) First, the POINT of the input job 30
It is checked whether or not the record number of the repositioning request specified by the macro 34 exists in the data transfer buffer 5. This check is performed in the transfer buffer management table 5
Head 52 of entry 51-1 of data transfer buffer 0
-1 and the last 52-2 can be performed depending on whether or not the requested record number exists (step 11).
0).

(2) If the repositioned record exists in the data transfer buffer 5 as a result of the check in step 110, the record concerned is input and the input pointer 53 of the data transfer buffer entry 51-1 of the transfer buffer management table 50 is entered. -2 is updated and the process is terminated (step 1
16, 117).

(3) If the record of the record number of the repositioning request does not exist in the data transfer buffer 5 in the check in step 110, it is checked whether or not the record exists in the temporary file 14. This check is performed based on the final output record number 61 of the temporary file management table 60. That is, when the record number of the repositioning request is smaller than the final output record number 61 of the temporary file management table 60, the temporary file 14
It can be determined that the record exists in (step 111).

(4) If it is determined in step 111 that there is no corresponding record in the temporary file 14, the input entry 41-2 of the transfer synchronization management table 40
Is set to the buffer empty wait state 46-3, and the repositioning control unit 11 is set to the wait state. When the waiting is released, the process returns to step 110 to re-execute the repositioning process from the beginning (step 112).

(5) If it is determined in the step 111 that there is a corresponding record in the temporary file 14, it is checked whether or not the corresponding record exists in the temporary file input buffer 13. This check is performed in the temporary file input buffer 13 when there is a corresponding record number between the first 52-1 and last 52-2 record numbers of the entry 51-3 of the temporary file input buffer of the transfer buffer management table 50. Is determined by determining that there is a corresponding record (step 11).
3).

(6) If it is determined in the step 113 that the repositioned record exists in the temporary input buffer 13, the relevant record is input and the entry 51- of the temporary file input buffer of the transfer buffer management table 50 is entered. The input pointer 53-2 of No. 3 is updated, and the process is terminated (steps 114 and 115).

(7) If it is determined in the step 113 that the repositioned record does not exist in the temporary input buffer 13, the temporary file input of the transfer buffer management table 50 is performed to input the record from the temporary file 14. The requested record number is stored in the first record number 52-1 of the buffer entry 51-3, the last record number 52-2 and the input pointer 53-3 are initialized, and the waiting of the temporary file input control unit 12 is released. When a record corresponding to the temporary file input buffer is input from the temporary file 14 by the temporary file input control unit 12, the process returns to step 110 and the repositioning process is continued from the beginning (step 118).

Next, the processing operation of the temporary file input control unit 12 will be described with reference to the flow shown in FIG. This process is started when the waiting state of the temporary file input control unit 12 is released in the process of step 118 described with reference to FIG.

(1) First, the transfer buffer management table 5
Positioning to the temporary file 14 is performed using the record number required for the first record number 52-1 of the entry 51-3 of the temporary file input buffer 0 (step 13).
0).

(2) After the positioning in step 130 is completed, a record is input from the relevant record to the temporary file input buffer 13 (step 131).

(3) Thereafter, the first record number 52-1 and the last record number 52-of the entry 51-3 of the temporary file input buffer of the transfer buffer management table 50.
2. The input pointer 53-2 is updated, and the process is completed after the input is completed (step 132).

According to the above-described embodiment of the present invention, it is possible to perform parallel synchronous transfer of data even for a task of repeatedly processing takeover data between jobs without changing a data output job and a data input job. And processing time can be shortened.

As a result of the above, the present invention is suitable for application to the following tasks which require repeated processing of data taken over between jobs, and the processing time in these tasks can be reduced.

The aforementioned tasks include, for example, 1. 1. A task of repeatedly inputting and processing arbitrary data with the data set open. Opening a dataset,
2. A task of performing processing by repeatedly inputting and closing; As in online real-time, there is ancillary work and the like in which it is necessary to repeatedly input and execute processing of output data of a work in which processing cannot be interrupted for a long time.

[0066]

As described above, according to the present invention, in the synchronous transfer control which makes it possible to shorten the processing execution time by executing the data output job and the data input job in parallel. Or, when a plurality of input jobs take out data in the middle and repeatedly input arbitrary data, it is unnecessary to re-output the output job, and
The restart of the input job can also be made unnecessary, whereby the processing execution time in the task of fetching one or more input jobs in the middle of the data and repeatedly inputting arbitrary data can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a synchronous transfer control unit according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a transfer synchronization management table.

FIG. 3 is a diagram illustrating a configuration of a transfer buffer management table.

FIG. 4 is a diagram illustrating a method of using a buffer.

FIG. 5 is a diagram illustrating a configuration of a temporary file management table.

FIG. 6 is a flowchart illustrating a processing operation of data output control.

FIG. 7 is a flowchart illustrating a processing operation of data input control.

FIG. 8 is a flowchart illustrating a processing operation of a temporary file output control unit.

FIG. 9 is a diagram illustrating a processing operation of repositioning control.

FIG. 10 is a flowchart illustrating a processing operation of a temporary file input control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synchronous transfer control means 2 Data output control part 3 Data input control part 4 Parallel data transfer synchronous control part 5 Data transfer buffer 10 Temporary file output control part 11 Repositioning control part 12 Temporary file input control part 13 Temporary file input buffer 14 Temporary File 15 Temporary file output buffer 20 Output job 30 Input job 40 Transfer synchronization management table 50 Transfer buffer management table 60 Temporary file management table

Claims (3)

[Claims] In a synchronous transfer control method for transferring data from an output job to one or more input jobs, data being transferred from an output job to an input job via a data transfer buffer is stored in a temporary file in parallel. A synchronous transfer control method, comprising: a temporary file input / output unit for re-inputting data not existing in the data transfer buffer from the temporary file to the input job. 2. A temporary file output buffer for storing data in a temporary file and a temporary file input buffer for inputting data from a temporary file to an input job, in addition to the data transfer buffer, as the temporary file input / output means. 2. The synchronous transfer control method according to claim 1, further comprising: outputting data from the output job to the temporary file via a temporary file output buffer in response to a delay in activation and execution of the input job. 3. The input job receives data from the data transfer buffer, and inputs data in the temporary file via the temporary file input buffer when the data transfer buffer becomes empty. 3. The synchronous transfer control method according to claim 2, wherein: