JPS63201756A - File replacing method for on-line system - Google Patents

Abstract

PURPOSE:To replace a file without stopping an on-line system, and to prevent an on-line service from being interrupted, by replacing a program when a processing module is not being executed. CONSTITUTION:A schedule 3 selects a processing module 7 to be replaced, judges whether the processing module 7 is being executed or not by executing module information 5, and selects other processing module, in case said module is being executed. If the processing module 7 is not being operated, a processing module 13 corresponding to an allocation area of the processing module contained in an external storage device 11 is read in accordance with module allocation information 4 and the module is replaced. The same processing is executed with regard to all of the processing modules 7-9 until the replacement processing is ended. In such a way, by replacing a program when the processing module is not being executed, a file can be replaced without stopping an on-line system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a file replacement method in an online system with a non-multiplexed configuration.

[Conventional technology]

Conventionally, when replacing files in a system with a non-multiplexed configuration, it was not possible to use a backup system or a standby system, so the system was stopped and the files were replaced by an initial full program load from an external storage device such as a magnetic tape device. The program was loaded into the main memory location and the system was restarted.

FIG. 3 is a flowchart of a conventional file replacement method for a non-multiplexing system. First, stop the online system processing (step 31), set a new file to the external storage (step 32), and load the program from the external storage to the main storage (step 33).
), reboot the system (step 34).

[Problem that the invention seeks to solve]

The conventional main storage file replacement method described above has the disadvantage that it is necessary to stop the online system for several minutes to several tens of minutes, which inevitably degrades the service.

[Means for solving problems]

The online system file replacement method of the present invention includes a scheduler for controlling the execution order of processing modules, module allocation information indicating the main memory location of each processing module, and currently executing module information in the main storage. ,
Based on the file replacement instruction, the scheduler sequentially selects a processing module whose location in the main memory is to be replaced from among the processing modules, and if the module is currently being executed by referring to the running module information, selects another processing module;
If it is not being executed, the corresponding processing module in the external storage device is read into the main memory location according to the module allocation information, and the program is replaced.

[Effect]

By replacing programs while the processing module is not running, files can be replaced without stopping the online system.

〔Example〕

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

FIG. 1 is a flowchart showing an embodiment of a file replacement method for an online system according to the present invention, and FIG. 2 is a diagram showing the configuration of a main storage device and an external storage device in this embodiment.

The main storage device 1 is divided into an operation system section 2 and an application section 6. Processing modules 7 to 9 are loaded into the application section 6. The operation system section 2 includes a scheduler 3 that controls the execution order of the processing modules 7 to 9 and file replacement, and a module call allocation that indicates the area allocation in the main memory of each processing child module 7, 8, 9 of the application section 6. 4, and currently executing module information 5 indicating the processing module being executed. A load module file 12 is stored in the external storage device 11, and the load module file 12 includes processing modules 13 to 15 to be loaded into the main storage device 1.

Next, the operation of this embodiment will be explained with reference to FIG.

First, the scheduler 3 selects the processing module 7 to be replaced (step 21), determines whether or not the processing module 7 is being executed based on the running module information 5 (step 22), and if it is running, selects another processing module. (Step 21).

If the processing module 7 is not operating, the external storage device 11
The processing module 13 corresponding to the allocation area of the processing module 7 within is read in accordance with the module allocation information 4 to perform module replacement (step 23). Similar processing is performed for all processing modules 7 to 9 until the replacement processing is completed (step 24).

〔Effect of the invention〕

As described above, the present invention allows files to be replaced without stopping the online system by replacing programs while processing modules are not being executed, and has the remarkable effect of preventing interruptions in online services.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of an embodiment of the file replacement method of the online system of the present invention, FIG. 2 is a block diagram of the main storage device and external storage device according to the embodiment of FIG.
The figure is a flowchart of a conventional example of a file replacement method for a non-multiplexing system. 1... Main storage device, 2... Operation system section, 3... Scheduler, 4... Module allocation information,
5... Executing module information, 6... Application section, 7.8, 9, 13.1/1. ．． 15... Processing joule, 11... External storage device, 12... Load module file, 21-24...
・Step. Figure 2□riA7□ Figure 3

Claims (1)

[Claims] In a non-multiplexed online system, a scheduler that controls the execution order of processing modules, module allocation information indicating the position of each processing module in the main memory, and information about currently executing modules are stored in the main storage. The scheduler sequentially selects the processing module to be replaced from among the processing modules in the main memory according to the file replacement instruction, and if the processing module is currently being executed, selects another processing module by referring to the running module information. , a file replacement method for an online system that reads a corresponding processing module in an external storage device into a main storage device according to module allocation information and replaces the program when the program is not being executed.