JPS62177651A - Parallel operation for computer system - Google Patents

Abstract

PURPOSE:To attain a parallel operation system that can avoid an all-out stoppage of the plant operation by connecting an old computer system and a new computer system via a memory device to attain the parallel operations. CONSTITUTION:A new CPU 4 supplies the plant data via a new process input/ output device 6 and at the same time writes this data to a prescribed point address part within a memory device 7. Then an old CPU 1 reads immediately the plant data out of said address part of the device 7 and supplied it to its own system. The device 7 is equivalent to a process input/output device for the CPU 1. Thus both CPU 1 and 4 input the same plant data to their systems respectively and approximately at the same time point. Then the parallel operations are carried out to the same plant through both computers by carrying out the same processing through both CPU 1 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to parallel operation of both the new and old computer systems when transitioning from the Japanese computer system to the new computer system.

[Technical Background of the Invention] Conventionally, a computer system that controls a power plant or the like is sometimes replaced with a new computer system after a certain period of time. For example, as shown in Figure 2 (A), the old CPU 1, old peripheral device 2, old process input/output device (PIlo > 3, etc.) that make up the computer system are as shown in Figure 2 (B). They are replaced by a new CPU 4, a new peripheral device 5, and a new process input/output device 6, which respectively constitute the new computer system.In such a case, if the hardware design concept of the new computer system is different (most In this case, the old process input/output device 3 is removed, so the old CPtJ1 cannot access the new process input/output device 6, and parallel operation of the new computer system is impossible. It becomes.

[Problems in the background art] As mentioned above, if parallel operation of both the new and old computer systems is not possible, the operation of the entire plant must be stopped when replacing the computer system, and if the plant is located at a power plant, etc. This is a big drawback. In order to avoid the above drawbacks, the new process input/output device 6 is connected to the old CPU 1.
In principle, it is possible to modify or design it so that it can be accessed by the 1f! Because it is not necessarily the same type,
In each case, 'ffr design is required, which is not realistic.

In addition, if the new process input/output device 6 is connected to the new and old CPU,
4.1, both CPUs 1.
There is a problem that a completely parallel operation cannot be achieved because there is a time lag in the accesses of No. 4 and the same data cannot be obtained. In addition, in plants where reliability is particularly required, such as nuclear power plants, when migrating to a new computer system, the new computer system will completely maintain its original performance compared to the old computer system. However, there was a drawback that the plant had to be shut down for a longer period of time.

[Object of the Invention] In view of the above-mentioned drawbacks, the object of the present invention is to develop a calculation system that enables parallel operation of the two-point computer system and avoids a complete shutdown of the plant when transitioning to a new computer system. The objective is to provide a parallel operation method.

[Summary of the Invention] The present invention connects an old computer system and a new computer system via a storage device, and the new computer system simultaneously imports plant data through its own input/output device. This plant data is written to the storage device, while the old computer system immediately reads the plant data written to the storage device and causes the new computer system to perform the same processing. The purpose of this invention is to enable parallel operation of both computer systems at the time of computer system migration, thereby avoiding a complete shutdown of the plant.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings, in which the same parts as those of the conventional example are denoted by the same reference numerals.

FIG. 1 is a block diagram showing one embodiment of the present invention.

1 is a CPU of the computer system to be replaced, and is referred to as the old CPU. Reference numeral 2 denotes a peripheral device connected to the old CPU 1, which is referred to as an old peripheral device.

4 is the CPU of the newly installed computer system, F
It is called 'rCPLI. Reference numeral 5 denotes a peripheral device connected to the new CPU 4, which is referred to as a new peripheral device. -6 is a process input/output device that imports plant data etc. into the new computer system, and is referred to as a new process input/output device. It is assumed here that the process input/output device of the old calculation transport system has already been removed.

7 is a storage device into which the new CPU 4 inputs the plant data via the new process input/output device 6, and at the same time the same human-powered data is written, and since this written data is immediately read out by the old CPU 1, the old CPU 1
For example, it is the same as the old process input/output device.

Next, the operation of this embodiment will be explained. r'rCPU4
When inputting plant data via the new process input/output device 6, the analysis CPU 4 simultaneously writes this input plant data into a predetermined point address section in the storage device 7. Immediately after this, the old CPU 1 reads out the plant data written in the predetermined point address section in the storage device 7 and inputs it into its own system. Therefore, the old CPU
1, the storage device 7 becomes equivalent to a process input/output device, and the new CPU 4 and old CPU 1 input the same plant data to their respective systems almost simultaneously. Therefore, if the new CPU 4 and the old CPU 1 are made to perform the same processing, parallel operation by the new computer system for the same plant can be realized.

By the way, when migrating from an old computer system to a new computer system, if one old process input/output device is removed,
A new process input/output device is installed to replace it, and eventually all the old process input/output devices are removed and replaced with the new process input/output device 6, as shown in FIG.

At this time, when one old process input/output device is replaced with the corresponding new process input/output device 6, the old CPUI can obtain the plant data from the removed old process input/output device from the storage device 7. , the same processing as before can be continued in parallel with the new CPU 4. In addition, plant operation only needs to be stopped for the part related to the replacement of the input/output devices, without having to completely shut down the plant.
It is possible to gradually transition from the daily computer system to the new revision computer system. Moreover, since the old CPU1 and the new CPU4 are running in parallel, IfCPU4 and the old CPU1
The processing results can be constantly compared, and the performance of new computer systems can be compared without stopping plant operation. Furthermore, at this time, if the expected processing is not performed due to a software malfunction or the like in the new computer system, the normal operation of the plant can be maintained using the processing results of the daily computer system.

Therefore, during parallel operation of the new Nichi computer system, there is of course an interface between the new Nichi computer system and the plant, and there is also an interface between the Nichi computer system and the plant. As a result, the interface between the old Calculation III system and the plant will be gradually removed, and eventually only the new computer system will be left.

According to this embodiment, the storage device 7 has a simple configuration that absorbs the difference in architecture between the old and new systems.
It is possible to perform parallel operation of the new computer system, and it is possible to migrate to the new computer system without stopping the plant.

[Effects of the Invention] As described above, according to the parallel operation method of the computer of the present invention, the daily computer system and the new computer system can be realized as follows. and at the same time, the new computer system takes in plant data through its own input/output device and writes this plant data to the storage device, while the new computer system writes the plant data to the storage device. By immediately reading out the plant data and having the new computer system perform the same processing, it is possible to perform parallel operation of the two-point computer system during the transition to the new computer system, thereby preventing a complete shutdown of the plant. There are effects that can be avoided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing configuration examples of a conventional daily computer system and a new revision computer system. 1... Old CPtJ 2... Old peripheral device 4...
・New CPU 5...New peripheral device 6...New process input/output device Agent Patent attorney Book 1) Takashi Figure 1 (A) 2 (B)

Claims (1)

[Claims] a first computer system having an input/output device for importing data; a second computer system having no input/output device; a storage device that can be commonly accessed by the first and second computer systems; The first computer system reads data through the input/output device and simultaneously writes this data into the storage device, and the second computer system immediately reads the written data from the storage device and stores it in its own computer system. Write data to be imported into the system/
reading means; using the data to read the first and second data;
and control means for causing both computer systems to perform the same processing.