JPH03214239A - Program control communication system - Google Patents

Abstract

PURPOSE:To restore a system down state at a high speed by attaining constitution where a controller can restore a system file into a state set before the occurrence of a system down state at the time of the occurrence of the system down state. CONSTITUTION:A controller 1 writes the back-up files 10b and 20b into a main memory 2 and then reads the changing/restoring processings 31 and 32 out of a magnetic disk 42 via a data channel 3 to store these processings in the memory 2. Then, the controller 1 carries out the processings 31 and 32 stored in the memory 2 in order to restore the changes 10b1 and 10b2 which are included in a system file 10a via a back-up file 10b stored in the memory 2 and inputted by a maintenance engineer. Thus, it is possible to secure the storage state of the file 10a set before the file 10a is changed. Then the time required for restoring the system down state can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stored program control communication system, and more particularly to a program control communication system capable of recovering system files when the system goes down.

[Prior Art] This type of stored program control communication system includes a control device that executes various communication controls, a main memory that stores programs that instruct the operation of this control device, and a backup file that stores backup files and the like. It is generally equipped with an external storage device such as a magnetic disk for storing data.

In the above-mentioned communication system, the main memory contains the programs for operating the system, system files that are changed sequentially to change system conditions or add new functions, and station files that are changed sequentially depending on operating station conditions. data files are stored. Further, the external storage device stores bank amplifier files for each of the above-mentioned files.

In such a communication system, when a system failure occurs, the control device reads out a bank amplifier file previously stored in an external storage device and writes it into the main memory.

This will restore the system to the state before it went down.

(Problems to be Solved by the Invention) By the way, in the conventional communication system described above, when the system goes down, the backup file is simply written to the main memory, and the system file cannot be changed.

Therefore, the above-described communication system cannot restore the changes made to the system file manually by the maintainer up to the time when the backup file of the system file is saved in the external storage device. Therefore, if the above-mentioned system file is the cause, the system will go down again. As a result, there is a drawback that the down time when the communication system goes down is prolonged, and a long time is required for recovery.

SUMMARY OF THE INVENTION An object of the present invention is to provide a program-controlled communication system that eliminates the above-mentioned drawbacks and can recover from system failure in a short time.

[Failure to solve the problem]

In order to achieve the above-mentioned object, the program control communication system of the present invention includes a control device that executes various communication controls,
System files such as programs that instruct the operation of this control device and station files that change depending on the operating station conditions are stored in the main memory, system files, hack amplifier files of system files and station files, and bank-up files of system files. 1. External memory that stores recovery processing for system file changes manually made by maintainers up to the time of saving to an external storage device. ! A program controlled communication system comprising a device,
When a system down occurs, the control device writes the file from the external storage device and, if stored, the recovery processing for changes to the system file to the main memory, and executes the recovery processing sequentially to prevent the system file from going down. It is characterized by a structure that allows it to be restored to a song's system file.

In addition, here, the external storage device includes a magnetic disk,
It is preferable to use magnetic tape, IC card, or non-volatile memory.

As described above, according to the present invention, even if the system goes down, it can be restored in a short time, and it is possible to prevent the system from going down again, especially when the system file is the cause.

〔Example〕

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

1 and 2 are used to explain the present invention in detail. Among them, FIG. 1 shows an example of the overall configuration of an embodiment of a program control communication system according to the present invention, and FIG. 2 shows an example of an external storage. FIG. 3 is a diagram showing files and the like stored in the device.

The embodiment of the program controlled communication system shown in FIG.
It stores a control device 1 that executes various communication controls, a system file tOa such as a program that is connected to the control device 1 and instructs the operation of the control device 1, and a station file 20a that is changed depending on the operating station conditions. It includes a main memory 2 and a magnetic disk 4, which is an external storage device connected via a data channel 3 and stores backup files 10b, 2Qb, system file modification/recovery processes 31, 32, and the like.

In the communication system described above, the main memory 2 includes a system file lOa that includes a program for operating the system and is changed sequentially to change system conditions or add new functions, and a system file lOa that is sequentially changed depending on the operating station conditions. A station data file 20a is stored.

Further, as shown in FIG. 2, the magnetic disk 4 stores a backup file 10b of the system file 10a, a backup file 20b of the station file 20a, and system file modification/recovery processes 31 and 32.

The operation of the embodiment configured in this way will be explained below.

Here, it is assumed that the backup file lOb of the system file 10a containing the changes 10b and 10b2 of the system file manually made by the maintenance personnel has been saved on the magnetic disk 4, and it is assumed that the system goes down in this state. do.

When a system down occurs, the control device 1 reads the bank amplifier file 10b of the system file and the bank amplifier file 20b of the station file from the magnetic disk 4 via the data channel 3, and writes them into the main memory 2.

Next, the control device 1 performs a change recovery process 31.
The determination is made based on whether or not 32 is stored.

Here, when the change recovery processing 31 and 32 are not stored in the magnetic disk 4, the control device 1 writes the bank up files 10b and 20b to the main memory 2 as described above, and thereafter writes the bank up files 10b and 20b to the main memory 2. Execution is started using a system file, etc., and recovery is performed.

On the other hand, when the modified restoration processes 31 and 32 are stored in the magnetic disk 4, the control device 1 writes the bank amplifier files 10b and 20b to the main memory 2 as described above, and then restores the modified data via the data channel 3. Processes 31 and 32 are read from the magnetic disk 4 and stored in the main memory 2. Then, by executing the change recovery processes 31 and 32 stored in the main memory 2, the control device 1 restores the system manually operated by the maintenance person included in the system file 10a based on the back amplifier file 10b stored in the main memory 2. file modification 10b;
, 10b2 can be restored. Then, the storage state of the system file lOa can be brought to the state before the system file was changed.

Therefore, in this embodiment, even if the system goes down, recovery is automatically performed, and the recovery time can be shortened.

In the above-described embodiment, the magnetic disk 4 has been described as an external storage device, but the invention is not limited to this, and a recording device using a magnetic tape and a magnetic tape device may also be used.
It goes without saying that the storage device may be an IC card or a nonvolatile random access memory.

〔Effect of the invention〕

As explained above, the program-controlled communication system of the present invention is designed to allow changes to be made even when the backup file of the system file at the time of a system down includes changes to the system file entered by the maintainer. This method has the effect of being able to recover quickly from system failures, since it can be quickly restored and prevents system failures from occurring again even if the system file itself is the cause of the system failure.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the storage state of the external storage device. 1...Control device, 2...Main memory,
3...Data channel, 4...Magnetic disk, 10a...System file, 10b...
... Backup file of system file, 20a... Station file, 20b... Backup file of station file, 3
1.32 ...System file change recovery processing.

Claims (1)

[Claims] 1. A main memory that stores a control device that executes various communication controls, system files such as programs that instruct the operation of this control device, and station files that are changed depending on operating station conditions. and an external storage device that stores the system file, the backup file of the station file, and the recovery process for system file changes input by the maintainer up to the time when the system file backup file is saved to the external storage device. In the program controlled communication system, when a system down occurs, the control device writes a file from an external storage device and, if stored, a recovery process for changes to the system file to the main memory, and executes the recovery process. A program control communication system characterized by having a configuration in which a system file can be restored to a system file before a system failure by sequentially executing the system files. 2. The program control communication system according to claim 1, wherein the external storage device is a magnetic disk. 3. The program-controlled communication system according to claim 1, wherein the external storage device is a magnetic tape.