JPH03282865A - Remote file reading-in system - Google Patents

Abstract

PURPOSE:To easily produce a device used for a remote file access by providing a file information informing means and a file transmitting means on a first computer of the side of which a file to be read in exists in a remote file store device. CONSTITUTION:A computer C1 and a computer C2 are connected, and the computer C1 is provided with a file transmitting means 1 and a file information informing means 2. Also, the computer C2 is provided with a file receiving means 3, a file information inquiring means 4, a file producing/deleting means 5, a file reading-in means 6, a file receiving state management table 7 and a remote file access managing means 8. Moreover, in the computer C1 and the computer C2, a remote file storage device 10 for read-in, and an application program 9 for processing a file exist, respectively. In such a way, the file on the other computer can be read in successively, and also, its device can easily be realized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a remote file reading method, particularly when a file to be read exists on a computer other than a computer that executes an application program that sequentially reads and processes files. Regarding remote file reading method.

[Conventional technology]

In the conventional remote file reading method, a remote file, which is a target file existing on another computer, is transferred to the own computer (2), and then an application program is executed to read the file.

Alternatively, in the conventional remote file reading method for directly accessing remote files, both computers are equipped with complicated mechanisms to achieve direct access to remote files.

[Problem to be solved by the invention]

The former method of the conventional remote file reading method described above, in addition to executing the application program,
This method has the drawback of requiring a file transfer prior to execution, which is time consuming and inefficient.

Furthermore, the latter method requires a mechanism for remote file access on both computers, which is complicated and cannot be easily created.

[Means to solve the problem]

The remote file reading method of the present invention is a remote file reading method for a distributed processing system in which a plurality of computers that can exchange data with each other are connected. file information notifying means for notifying file information of the remote file storage device in response to a file information inquiry from a second computer; and retrieving a file requested by the second computer from the remote file storage device; file information inquiry means for inquiring file information from the second computer that reads the file and executes the application program to the first computer; a file creation/deletion means for setting a file storage area in a temporary file storage device based on the file information and deleting it after use; a file reception state management table in which received record numbers are written by the file reception means; file reading means for reading records of files received from the temporary file storage device; When an open command in sequential read mode for a file on the computer No. 1 is received, a file storage area is set in the temporary file storage device by the file information inquiry means, the file creation/deletion means, and the file reception means. When receiving a read command, it refers to the file reception status management table and waits for reception if it has not been received.
If the record has been received, the record is immediately read by the file reading means and passed to the application program, and when a close command is received, the file storage area is deleted from the temporary file device by the file creation/deletion means. A file access management means;

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the remote file reading method of the present invention, and FIG. 2 is an operational explanatory diagram showing an example of the processing flow of this embodiment.

As shown in FIG. 1, a computer C1 and a computer C2 are connected, the computer C1 is equipped with a file transmitting means 1 and a file information notifying means 2, and the computer C2 is equipped with a file receiving means 3, a file information inquiry means 4. File creation/deletion means 5. File reading means 6. It includes a file reception status management table 7 and remote file access management means 8.

Further, the computer C1 has a remote file storage device 10 to be read, and the computer C2 has an application program 9 for processing files.

The application program 9 of the computer C2 is designed to sequentially read files in its own computer C2, and the target file to be read is the remote file storage device 1 of the computer C1.
It is at 0.

In this embodiment, an application program 9 is executed on the computer C2, and a file is transferred from the remote file storage device 10 of the computer C1 as if it were a computer C2.
It can be read as if it were a file in 2.

Hereinafter, the operation of this embodiment will be explained along with FIG.

First, when the remote file access management means 8 receives an oven request for sequential read mode from the application program 9, if the file to be read is in the remote file storage device 10 of the computer C1, the remote file access management means 8 uses the file information inquiry means 4 to remotely access the file. The file attributes, capacity, etc. of the files in the file storage device 10 are inquired.

Therefore, the file information inquiry means 4 issues a notification request to the file information notification means 2, and the file information notification means 2 checks the file information of the remote file storage device 10 in accordance with the request and sends it back.

Furthermore, the remote file access management means 8 notifies this file information to the file creation/deletion means 5, so that the file creation/deletion means 5 stores the file in the temporary file storage device 11 with the same attributes as the file in the remote file storage device 10. Set the file storage area.

Then, the remote file access management means 8 initializes the file reception status management table 7, issues a file reception request to the file reception means 3, and returns an open command completion to the application program 9.

On the other hand, the file receiving means 3 communicates with the file transmitting means 1, sequentially receives the files in the remote file storage device W1, writes them into the storage area of the temporary file storage device 11, and at the same time writes them into the file reception status management table 7. Write the received record number.

Subsequently, when a read command is executed from the application program 9, the remote file access management means 8 refers to the file reception status management table 7, and if the record has been received, performs the read process, but if the record has not been received, If there is, it waits until the reception is finished and performs the reading process while the reception is completed.

In the reading process, a file record is read from the temporary file storage device 11 using the file reading means 6 and is passed to the application program 9.

Finally, when the close command is executed from the application program 9, the remote file access management means 8 uses the file creation/deletion means 6 to delete the storage area of the temporary file storage device 11, and notifies the application program 9 of completion of the close. return it.

〔Effect of the invention〕

As explained above, the remote file reading method of the present invention is a distributed processing system in which multiple computers are connected that can transfer files to each other, and it is also possible to add or modify application programs that process files on the own computer. Moreover, it is possible to sequentially read files on other computers without having to copy the entire file in advance, and it has the effect that the mechanism can be easily realized.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the remote file reading method of the present invention, and FIG. 2 is an operational explanatory diagram showing an example of the processing flow of this embodiment. 1... File sending means, 2... File information notifying means, 3... File receiving means, 4... File information inquiry means, 5... File creation/deletion means,
6... File reading means, 7... File reception status management table, 8... Remote file access management means, 9... Application program, 10
...Remote file storage device, 11...Temporary file storage device, C1, C2...Computer.

Claims (1)

[Claims] In a remote file reading method for a distributed processing system in which a plurality of computers that can exchange data with each other are connected, a first computer whose file to be read exists in a remote file storage device is connected to a second computer. file information notification means for notifying file information of the remote file storage device in response to a file information inquiry from a computer; file information inquiry means for inquiring file information from the first computer to the second computer that reads the file and executes the application program; a file creation/deletion unit that sets a file storage area in a temporary file storage device based on the information and deletes it after use; and a file reception unit that receives a file sent by the file transmission unit and writes it to the temporary file storage device. means; a file reception status management table into which a received record number is written by the file reception means; a file reading means for reading a record of the file received from the temporary file storage device; When an open command in sequential read mode for a file is received, the file information inquiry means, the file creation/deletion means, and the file reception means set a file storage area in the temporary file storage device and receive the file. , when accepting a read command, refer to the file reception status management table, wait for reception if it has not been received, and then
If the record has been received, the file reading means immediately reads the record and passes it to the application program, and when a close command is received, the file creation/deletion means deletes the file storage area from the temporary file device; remote file access; A remote file reading method comprising: a management means; and a remote file reading method.