JPH0247754A - Data processing system - Google Patents

Abstract

PURPOSE:To easily start a user program by designating the number of the logical device, where a file exists, by the user program without paying attention to the system on the request side to access the file on an external storage device. CONSTITUTION:A user program 7 of a system 1 on the service side designates the number of the logical device where a file exists. When the user program 7 of the system on the service side is started by a connection work station 3 of a system 2 on the request side, work station recognition processing 4a is performed to generate a work station control block 5a, and the control is transferred to the system 1. In the system 1, a work station control block 5b is generated by work station recognition processing 4b. When the file access request from the started program 7 on the user side indicates the number of the logical device, the control of the user program 7 is advanced through remote file access processing routines 6a and 6b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data processing method, and particularly to a data processing method for files installed in a remote system when data is exchanged between a plurality of systems.

[Conventional technology]

Conventionally, in this type of data processing method, the control blocks that manage workstations and external storage devices (files) of the requesting system were managed only by the physical number of each device, so the user program of the started service system The physical number of the external storage device installed on the requesting system had to be specified.

[Problem to be solved by the invention]

In the conventional data processing method described above, when a user starts a user program on a remote system and accesses a file on the user's system, an external storage device number must be specified in the user program. This has the disadvantage that the systems that can start the user program are restricted.

[Means to solve the problem]

The data processing method of the present invention is a data processing method for files installed in remote systems between multiple systems, and includes a processing routine that recognizes a workstation started from a requesting system and a control block that manages the processing routine. , a file access processing routine for remote file access, and remote file management information.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the invention. In FIG. 1, one embodiment of the present invention considers the external storage device 9 connected to the requesting system 2 to be logically similar to the device connected to the service side system 1; The user program 7 on the system 1 side specifies the logical device number where the file exists. When the user program 7 of the service side system 1 is started from the connected workstation 3 of the request side system 2, a process 4a is performed to recognize the workstation used in the system,
A workstation control block 5a is created and control is passed to system 1. In the system 1, based on the information passed from the system 2, the workstation control block 5b is used in the workstation recognition processing 4b as in the system 2.
Create. If the file access processing request from the activated user program 7 is a logical device number, the remote file access processing routine 6b determines the physical status of the device connected to the activated workstation from the workstation control block 5b. Get a number. Based on the obtained device number, remote file information is registered in advance, and the file requested for file access is searched from the remote file information 8, and control is passed to the remote file access processing routine 6a of the system 2. This remote file access processing routine 6a performs actual file input/output processing, and then returns control to the system 1 to proceed with the processing of the user program 7.

The above-described file access processing allows the user program to access files in the requesting system without being aware of the activated requesting system.

〔Effect of the invention〕

As explained above, when exchanging data between multiple systems, the present invention allows the user program to specify the logical device number where a file exists without being aware of the requesting system. Since files on the connected external storage device can be accessed, the user can use the user program of the service side system without being aware of the logical device number. In other words, the device number of the user program can be changed. This has the effect of eliminating the need to do so.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. 1... System (service side system), 2...
system (request side system), 3... workstation, 4... workstation recognition processing routine, 5... workstation control professional 7ri, 6...
- Remote file access processing routine, 7... User program, 8... Remote file management information, 9 External storage device.

Claims (1)

[Claims] In a data processing method for files installed in a remote system when data is exchanged between multiple systems, a processing routine that recognizes a workstation started from a requesting system and a control block that manages it; A data processing method characterized by having a processing routine for remote file access and remote file management information.