JPS63298455A - File replacement method for remote system - Google Patents

Abstract

PURPOSE:To shorten the service interruption time by providing a 1st area and a 2nd area storing a replaced file and using an old file stored in the 1st area to ensure the rise of a system in case the system rise fails with the replaced file which is received from a host device and stored in the 2nd area. CONSTITUTION:A lower level device 2 serves as a processor of a single constitution and contains a file memory 4 and a file memory 3 of a host device 1 stores a replaced file 9 of the device 2. When the rise abnormality occurs after a start operation, an IPL counter 7 is replaced and the rise is carried out again. Then the old file data is read out of an old file storing area 10 of the memory 4 and given to a main memory 5 in case the rise is impossible with the file 9 and the counter 7 is fixed at the constant value. Then the rise is performed with the old file for execution of the system rise. A host device 1 refers to the counter 7 of the device 2 to identify the old or replaced file that has a rise. Thus the service interruption time is shortened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for updating files of lower-order devices in an online system such as an electronic exchange and a slave computer, and particularly relates to a method for remotely controlling a -1 configuration processing device. Regarding how to update files.

[Conventional technology]

The conventional file update method is disclosed in Japanese Patent Application Laid-Open No. 60-156822.
As described in the publication, the configuration is such that new and old files are managed by a higher-level device, and the file memory of the lower-level device on the file update side is rewritten with the new file.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the case where there is a problem with the new file and the system cannot be established using the new file. Therefore, if the file update file of the file update target system is rewritten to a new file and system establishment using the new file fails, the old file is transferred from the higher-level device to the lower-level device again, stored in the file memory, and then the old file is rewritten. A system needs to be established.

SUMMARY OF THE INVENTION An object of the present invention is to provide a file update method for a remote system that uses automatic logic to detect failure in establishing a system using new files, minimizes service interruption time, and closes old files later.

[Means for solving problems]

The above purpose is to permanently provide a storage area for backup files (old files) during operation and a file storage area for file updates in the file memory of the lower-level device, and to provide at least one storage area for file updates when a file is updated based on a startup instruction from the higher-level device. This is achieved by attempting to start up the system by pulling up the restored file, and if it fails, by controlling the counter so that the higher level side can recognize the restoration of the old file, and then starting up the system based on the old file.

[Effect]

The old file is stored in the backup file storage area of the file memory on the lower device side, and if system establishment using the new file fails, the system is established using the old file and the establishment of the system using the old file is notified to the upper device, resulting in service interruption. It takes less time, and the host device can recognize the file being used.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a configuration diagram of a remote system to which an embodiment of the present invention is applied. In FIG. 1, 1 is the upper device, 2 is the lower device, 3 is the upper device file memory, 4 is the lower device file memory, 5 is the main memory, 6 is the file update mode storage memory, and 7 is the startup file separation. IPL counter for recognition, 8 is IPLROM, 9 is update file.

Reference numeral 10 indicates an area for old files, and reference numeral 11 indicates an area for updated files.

The lower device 2 is a single configuration processing device, and has a file memory 4.
The update file 9 of the lower device is stored in the file memory 3 of the upper device [1]. When updating a file, the update file 98 of the upper device 1 is transferred to the update file area 11 of the lower device 2, and then
8 reads the update file data into the main memory 5 of the lower device 2 and starts the program at the start address.

FIG. 2 is a flowchart showing a procedure for exchanging files between the higher-level device 1 and the lower-level device 2. When a command is input to the higher-level device 1, the higher-level device 1 sends a file update mode notification signal to the lower-level device 2.

The lower device 2 that has received the signal secures the update file storage area 11, and then stores the update file data transferred from the higher device 1 in the secured update file storage area 11. Further, when the lower device 2 receives a file update mode storage memory setting instruction signal (FF setting instruction signal) from the higher device 1, it sets the file update in the file update mode storage memory 6, and then The system of the lower-order device 2 is started based on the start-up instruction signal.

FIG. 3 is a flowchart showing a system startup procedure in a lower-level device. A determination is made on the counter 7 based on a start-up instruction from the host device 1, and if the content of the counter 7 is smaller than a fixed value, a determination is made as to the file update mode. This determination of the file update mode is made using a flag, and if the flag indicates file update, the file is read and updated file data is read into the main memory 5 from the updated file area 11. Then, the program is started and the program is started from the restart address.

If a startup error occurs after startup, update the IPL counter 7 and restart the startup. If startup is still not possible with the updated file and the IPL counter 7 is at a fixed value, the old file is saved from the old file storage area 10 of the file memory. Load the file data into the main memory 5, start up using the old file,
Start up the system.

Then, the higher-level device 1 uses the IPL counter 78 of the lower-level device 2.
By referring to it, it is possible to recognize whether the startup file is an old file or an updated file.

〔Effect of the invention〕

According to the present invention, by replacing the updated file after storing the updated file in the file memory of the multiplexed configuration processing device, it is possible to significantly reduce the service interruption time when replacing the file, and also to prevent problems with the new file. If the system cannot be established due to system failure, it is possible to restore the old file using automatic logic, and the service interruption time can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a remote system to which an embodiment of the present invention is applied, Fig. 2 is a 70-chart of a file exchange procedure between a higher-level device and a lower-level device, and Fig. 3 is a 70-chart of a lower-level device system startup procedure. - Chart 0 1... Upper device 2... Lower device 6... Upper device file memory 4... Lower device file memory 5... Main memory 6... File update mode storage memory 7.・・IPL
Counter 8...IPL-ROM9...Updated file 10...Old file storage area 11...Updated file storage area Agent Patent attorney Katsuo Ogawa 2. TIL[,i
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Claims (1)

[Claims] 1. In a remote system that has a single-configuration processing device with a file memory in a remote location and configures an online function with a higher-level device and a lower-level device, the first area for storing old files and the first area for storing updated files are stored in the file memory of the lower-level device. providing a second area for the system, and when starting the system using the updated file transferred from the host device and stored in the second area fails, starting the system using the old file stored in the first area; A file update method for a remote system, characterized by: