JPH04293131A - Alternate processing method for information processor - Google Patents

Abstract

PURPOSE:To surely execute the normal program even if a fault is generated in a program executing device and a program store device. CONSTITUTION:Multiplexed program executing devices 4, 5, and multiplexed program store devices 100-400 are provided, and by the present program executing device, the program store device used by the next program executing device is designated so as to be different from that which is used by the present program executing device. In the case the program cannot be executed by the present program executing device, the next program executing device executes the program by using the designated program store device.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides alternative processing for an information processing device that includes a plurality of program execution devices and a plurality of program storage devices, and executes the program on the next program execution device when the program cannot be executed. Regarding the method.

0002

2. Description of the Related Art Some information processing apparatuses such as workstations have a plurality of program storage devices and a plurality of program execution devices in order to improve reliability. That is, there are devices in which a program execution device and a program storage device are multiplexed.

FIG. 2 is a block diagram showing such an information processing device. The device shown in the figure is program execution device 1 of system 1.
, a 2-system program execution device 2, a system monitoring device 3,
A plurality of program storage devices 100 , 200 , 300
, 400. The program execution devices 1 and 2 of the 1st and 2nd systems each have a CPU (central processing unit) 11.
, 21, memories 12, 22, and IPL (initial program loader) device information storage devices 13, 23, and these 1st and 2nd systems have substantially the same configuration. CPU1
1 and 21 are processors that perform various processes, and memory 1
2 and 22 consist of random access memories. IP
The L device information storage devices 13 and 23 are memories that store IPL device information 14 and 24 indicating which program storage device 100 to 400 the system uses to start up, and the selection of the program storage device 100 to 400 from the outside. It is now possible to do this. The system monitoring device 3 is a monitoring device that monitors which system the current program execution device is running on. Program storage device 100 to 400
consists of a magnetic disk device, and has IPL programs 101 to 4 for starting the program execution devices 1 and 2.
01 and application programs 102 to 402
It is equipped with In addition, these IPL programs 101
~401 and application program 102
402 have substantially the same configuration.

Next, the operation of the information processing apparatus configured as described above will be explained. FIG. 3 is a flowchart showing the operation of the information processing device. First, the system for starting up the information processing device is determined in advance by the system monitoring device 3.
This is called the 1st system. As a result, the CPU 11 performs the IPL
The IPL device information stored in the device information storage device 13 is referred to and the IPL program is read from the IPL device (step S31). Now, IPL device information storage device 1
The IPL device stored in 3 is transferred to program storage device 1.
00, the CPU 11 reads the IPL program 101 from the program storage device 100, and starts the information processing apparatus using this IPL program 101 (step S32). Next, the CPU 11 performs IPL
The application program 102 is read from the program storage device 100 serving as a device, and this program is stored in the memory 12 (step S33). after that,
When the reading into the memory 12 is completed, the application program 102 stored in the memory 12 is executed (step S34).

[0005] Furthermore, if the information processing device is not started up or the application program is not executed normally in the program execution device 1 of the first system, the system monitoring device 3 determines whether the operating system of the information processing device is activated by the program execution device of the second system. Switch to 2. That is, the IPL device information storage device 23 of the second system usually has the program storage device 10 as the IPL device.
0 is set. As a result, the program execution device 2 of the second system reads the IPL program 101 and the application program 102 from the program storage device 100 in the same way as the first system. As a result, if the startup is performed normally, the information processing device continues to run, but if the startup is not successful or the application program cannot be executed normally, the operator
Switch the IPL devices of the PL device information storage devices 13 and 23, and then select any of the program storage devices 100 to 400 again.
Load the program.

[0006]

[Problems to be Solved by the Invention] However, in the above-mentioned alternative processing method for the conventional information processing device, both the 1st system and the 2nd system are
Since the IPL devices stored in the PL device information storage devices 13 and 23 were fixed, for example, the IPL programs 101 to 40 of the program storage devices 100 to 400
1 and application programs 102 to 402
If there is a failure, even if the program execution devices 1 and 2 of the 1st and 2nd systems are switched, the same program storage device will be used. As a result, there is a problem in that even if the program execution devices 1 and 2 are switched, normal startup and application program execution are not performed.

[0007]Also, in this case, a method may be considered in which the operator rewrites the IPL device information 14, 24 in the IPL device information storage devices 13, 23 until the program is executed normally; There was a problem in that the operator had to constantly check whether the system could be used or not, resulting in very poor operability.

The present invention has been made to solve the above-mentioned conventional problems, and even if a fault occurs in a program in a program execution device or a program storage device, the program can be executed normally. The purpose of the present invention is to provide a highly reliable alternative processing method for information processing devices.

[0009]

[Means for Solving the Problems] An alternative processing method for an information processing device according to the present invention includes a multiplexed program storage device,
Each of them includes a multiplexed program execution device that selects and uses one of the program storage devices among the program storage devices, and executes the program by one of the program execution devices among the multiplexed program execution devices. In an alternative processing method for an information processing device that replaces execution processing, a current program execution device specifies a program storage device to be used by a next program execution device to be different from a program storage device used by the current program execution device. , if the program cannot be executed by the current program execution device, the program is executed by the next program execution device.

0010

[Operation] The alternative processing method for an information processing device of the present invention includes a multiplexed program execution device and a multiplexed program storage device, and the current program execution device stores programs to be used by the next program execution device. Specifies a device different from the one used by the current program execution device. If the current program execution device cannot execute the program, the next program execution device executes the program using the designated program storage device. Therefore, even if a failure occurs in the program execution device or program storage device, normal program execution is ensured.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an information processing apparatus that implements the alternative processing method of the present invention. The device shown in the figure consists of a first system program execution device 4, a second system program execution device 5, a system monitoring device 3, and a plurality of program storage devices 100, 200, 300, and 400.

The program execution devices 4 and 5 of the 1st and 2nd systems each have a CPU (central processing unit) 41, as in the past.
, 51, memories 42, 52, and IPL (initial program loader) device information storage devices 43, 53, and these 1st and 2nd systems have substantially the same configuration. CPU4
1 and 51 are processors that perform various processes, and memory 4
2, 52 consists of random access memory. IP
The L device information storage devices 43 and 53 are memories that store IPL device information 44 and 54 indicating which program storage device 100 to 400 the system uses to start up, and are used to select the program storage device 100 to 400 from the outside. It is now possible to do this. The system monitoring device 3 is a monitoring device that monitors in which system the current program execution device is running, as in the past. Program storage device 1
00 to 400 are magnetic disk devices, and IPL programs 101 to 401 for starting the program execution devices 4 and 5 and an application program 1
02 to 402 and partner IPL device information change programs 103 to 403. Also, these I
The PL programs 101 to 401 and the application programs 102 to 402 each have substantially the same configuration. Partner system IPL device information change program 1
03 to 403 are programs that rewrite the IPL device information of the other system, such as 1 system to 2 systems, 2 systems to 1 system, and the IPL device information of the other system to the own system IPL device information.
This is a program that rewrites the PL device so that it becomes the next IPL device.

Next, an alternative processing method for the information processing apparatus configured as described above will be explained. FIG. 4 is a flowchart showing the alternative processing method. Here, the first startup device is set to the program execution device 4 of the 1st system, and the IPL devices of the 1st and 2nd systems are set to the program storage device 100.
Suppose that it is set to . First, the CPU 41
Refers to the IPL device information 44 stored in the L device information storage device 43, reads out the IPL program 101 stored in the program storage device 100 and the partner system IPL device information change program 103, and stores them in the memory 42 ( Step S41). Next, the CPU 41 executes the partner IPL device information change program 103,
I stored in the IPL device information storage device 53 of the 2nd system
The PL device information 54 is rewritten (step S42). That is, the IPL device information 54 is rewritten so that the IPL device becomes the next program storage device 200. After that,
The IPL program 101 is activated and the application program 102 is read in the same manner as in the past (step S43). If this startup is performed normally (step S44), the CPU 41 returns the second system IPL device information 54 to the program storage device 100, which is the original IPL device (step S45).

[0014] Further, in step S44, if the information processing device is not started normally, the CPU 41 stores the IPL device information 44 in the IPL device information storage device 43 of its own system in the program storage of the next IPL device. device 20
0 (step S46), and the process is transferred to the second system (step S47). When processing moves to the second system,
The CPU 51 performs the same processing as the first system. That is, the partner IPL device information change program 203 and the IPL program 202 are read from the program storage device 200 (step S48), and then the IPL device information 44 of the IPL device information storage device 43 of the first system is read into the program for the next IPL device. Rewrite to storage device 300 (step S
49). Thereafter, the information processing device is started (step S410), and if this startup is performed normally (step S411), the IPL device information storage device 43 of the 1st system
The IPL device information 44 is returned to the program storage device 200, which is the original IPL device (step S412). Furthermore, if the startup is not performed normally, the process returns to the program execution device of the first system, and this process is repeated until the startup is performed normally.

[0015] Therefore, as in the past, the operator
There is no need to manually switch the program storage device as the L device, and the information processing device can be started with high reliability.

In the above embodiment, there are two systems, the 1st system and the 2nd system, as program execution devices, but the number is not limited to this, and there may be three or more systems. Of course. Similarly, with regard to the number of program storage devices, if there are a plurality of program storage devices, the same effects as in the above embodiment can be achieved. Furthermore, in the above embodiment, if the program execution device 4 of the first system is not started, the I/O of the second system is
The PL device information 54 is stored in the next program storage device 200.
However, in this case as well, it is of course possible to switch to another program storage device 300 or 400, for example.

[0017]

As explained above, according to the alternative processing method for an information processing device of the present invention, a current program execution device can store a program storage device used by a next program execution device in the same way as the current program execution device. Since the program storage device used by other program execution devices will always be different from the original one, the operator will not have to switch program storage devices, improving operability and improving It is possible to improve the reliability of startup.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an information processing apparatus for implementing an alternative processing method for an information processing apparatus according to the present invention.

FIG. 2 is a block diagram of an information processing device for implementing an alternative processing method for a conventional information processing device.

FIG. 3 is a flowchart showing the operation of a conventional information processing device.

FIG. 4 is a flowchart illustrating an alternative processing method of the information processing apparatus of the present invention.

[Explanation of symbols]

4,5 Program execution device 44, 54 IPL device information

Claims (1)

[Claims] Claim 1: A multiplexed program storage device;
Each of them includes a multiplexed program execution device that selects and uses one of the program storage devices among the program storage devices, and executes the program by one of the program execution devices among the multiplexed program execution devices. In an alternative processing method for an information processing device that replaces execution processing, a current program execution device specifies a program storage device to be used by a next program execution device to be different from a program storage device used by the current program execution device. . An alternative processing method for an information processing device, characterized in that if the program cannot be executed by the current program execution device, the program is executed by the next program execution device.