JPH07160370A - Service interruption controller - Google Patents

Abstract

PURPOSE:To provide a service interruption controller which can minimize the capacity of an emergency power supply at the time of service interruption. CONSTITUTION:A shut-down processing part 26 controls the priority of a CPU, an I/O, etc., for application in a work station 10 at the time of service interruption processing and then assigns the CPU, the I/O, etc., with preference to such applications that are hard to be interrupted during their processings. The priority is controlled based on the priority set after application and stored in a process priority storage part 22, the start/stop states of applications stored in a process start history storage part 23, and the load states of the CPU and the I/O which are detected by a CPU/I/O load detecting part 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power failure management device which normally stops a computer system when a power failure occurs.

[0002]

2. Description of the Related Art Generally, a computer system is provided with a power failure management device having a function of detecting a power failure and automatically switching from a commercial power source to an emergency power source.

For example, FIG. 5 shows a computer system in which a workstation is equipped with an uninterruptible power supply. Three application programs are executed on the workstation 10. The application 12 is a program for creating a production schedule, the application 13 is a program for controlling a facility communication function of sending a schedule to the facility and collecting production information from the facility, and the application 14
Is a function to monitor the collected production information. The shutdown processing unit 16 has a function of issuing a stop command to the execution of these application software. The operating system 17 has a function of receiving a power failure occurrence signal output from the uninterruptible power supply device 18 based on the voltage drop and issuing a start command to the shutdown processing unit 16.

Therefore, when a power failure occurs, the voltage drop accompanying the occurrence is detected by the uninterruptible power supply 18, and along with this detection, the commercial power supply is switched to the emergency power supply. This power switching is performed by the uninterruptible power supply 1
Performed by 8. Emergency power supplies usually have the capacity to run the system for a few minutes. At the same time as this switching, the uninterruptible power supply 18 outputs a power failure occurrence signal to the operating system 17. The operating system 17 receives this signal and outputs a start command to the shutdown processing unit 16. Receiving this instruction, the shutdown processing unit 16 outputs a request for stop processing to each of the applications 12, 13, 14 and shuts down the workstation 10 after stopping each application so that the workstation 10 can be stopped.

[0005]

However, in such a conventional power failure management device, as shown in FIG. 1, the application 12 for creating a schedule and the application 13 for controlling the facility communication function are simultaneously executed. In other words, in other words, if a program that causes inconsistency of schedule information if processing is stopped during calculation and a program that can be stopped at any time are running at the same time. Even if a power outage occurs, it is necessary to secure the power supply until the processing of the schedule creation application is completed, so in consideration of all cases, the capacity of the emergency power supply must be considered. There is a problem that we have no choice but to increase. This is CP so that there is no missing information.
It is necessary to stop the processing of a program in which U and I / O have a high priority and CPU and I / O have a low priority, such as batch processing. The same can be said of the case.

The present invention has been made in order to solve such problems, and manages the priority of the CPU, I / O, etc. of the application during the power failure process, and makes it difficult to perform the interrupt process during the process. CPU, I / O
The purpose is to provide a power outage management device that gives priority to the above.

[0007]

SUMMARY OF THE INVENTION The present invention for achieving the above object includes a detecting means for detecting a power failure state of a commercial power supply supplied to a computer system, and a case where the power failure state is detected by the detecting means. Include a switching means for switching the power supply to the computer system from a commercial power supply to an emergency power supply, and a process storage means for monitoring a process of an application running in the computer system and updating and storing the state of this process at any time. And priority storage means for storing the priority of the process of the application running on the computer system,
Load state detection means for detecting the load state of the CPU and interface of the computer system, and when the detection means detects a power failure state, the state of the process stored in the process storage means, the priority storage In consideration of the priority of the process stored in the means and the load status detected by the load status detection means, the process of the application currently being executed ends its processing within the maintenance time of the emergency power supply. Thus, the execution control means controls the execution order of the programs of the application.

[0008]

The present invention thus constructed operates as follows. The detection means detects a power failure state of the commercial power supply supplied to the computer system. The switching means switches the power supply to the computer system from the commercial power supply to the emergency power supply when the power failure state is detected by the detection means. The process storage means monitors the process of the application running in the computer system and updates and stores the state of this process at any time.
The priority storage means stores the priority of the process of the application running on the computer system, and the load state detection means detects the load state of the CPU and the interface of the computer system, and executes the load state detection means. When the load state detection unit detects a power failure state, the control unit detects the state of the process stored in the storage unit, the priority of the process stored in the priority storage unit, and the load state detection. In consideration of each of the load states detected by the means, the execution sequence of the programs of the application is controlled so that the process of the application that is currently being executed ends its processing within the maintenance time of the emergency power supply.

Therefore, even if a power failure occurs, it becomes possible to preferentially execute a program whose processing cannot be suddenly stopped, and the power failure processing can be performed within the maintenance time of the emergency power supply. It will be possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a power failure management device according to the present invention.

In the figure, the same components as those in FIG. 5 are designated by the same reference numerals. The application 12, the application 13, and the application 14 are applications that run on the workstation 10. The application 12 is an application having a function of creating a production schedule, and this application cannot stop processing suddenly.
The application 13 is an application that controls a facility communication function, specifically, a communication function of sending a production schedule to the facility and collecting production information from the facility. The application 14 controls the monitoring function and is an application for monitoring the collected facility information.

The process monitoring unit 20 has a function of monitoring the processing states of these applications 12, 13 and 14, and also has a function of rewriting the table of the process activation history storage unit 23 described later. ing. The process priority storage unit 22 stores the priority of the application executed on the workstation 10 as shown in FIG. 2, and functions as a priority storage unit. Process start history storage unit 23
Is for storing the start and stop information as shown in FIG. 3 for grasping which application is started or stopped in the workstation 10, and is a process memory. It functions as a means.

The CPU / I / O load detection unit 24 detects the load state of the CPU or I / O in the workstation 10 via the process monitoring unit 20, and functions as load state detection means. . The shutdown processing unit 26 uses the process priority stored in the process priority storage unit 22 and the process start history storage unit 23.
Which application is to be stopped in what order based on the history information regarding the start / stop of the application stored in the CPU, and the CPU and I / O load states detected by the CPU and I / O load detection unit 24. It has a function of determining, and functions as execution control means.

The uninterruptible power supply unit 18 has a function of detecting a power failure state and a function of switching from a commercial power source to an emergency power source when a power failure state is detected. It functions as a switching means.
The operating system 17 receives a power failure occurrence signal output from the uninterruptible power supply unit 18 in response to the detection of the power failure state, and outputs a startup command to the shutdown processing unit 26.

The shutdown processing unit 26 that has received this start-up command outputs a request for stop processing to each of the applications 12, 13, 14 and shuts down the workstation 10 after stopping each application so that the workstation 10 can be stopped. Put in a state.

The above schedule creating application is activated several times a day to create a schedule. The process of creating the schedule is performed in a batch process, and the use priority of the CPU and I / O is set low. On the other hand, since the application that controls the facility communication function must process work instructions to the facility and collect production information from the facility online, the CPU and I / O use priority is set to the highest.

The power failure management device of the present invention having the above-described structure operates as follows according to the flowchart shown in FIG.

When a power failure occurs in the commercial power supply, the uninterruptible power supply 18 detects the occurrence of the power failure, and a power failure occurrence signal is sent to the operating system 17 together with the detection.
Is output to. The operating system 17 outputs a start command to the shutdown processing unit 26 in response to the input of the power failure occurrence signal. Shutdown processing unit 2
In response to this instruction, 6 refers to the process priority stored in the process priority storage unit 22 as shown in FIG. 2, and outputs a stop request to the A-rank application having the highest stop priority. Yes (S1). Next, the shutdown processing section 26 looks up the start / stop status of each application as shown in FIG. 3 stored in the process start history storage section 23 and stores it in the process priority storage section 22. By referring to the process priority as shown in FIG. 2, it is determined whether or not the application having the stop priority of B or C is in the operating state (S
2). As a result of this determination, if the B and C rank applications are not in the operating state, the shutdown processing unit 26
Outputs a stop request to all applications to perform shutdown processing (S3, S4). On the other hand, as a result of this determination, if any of the applications of B rank and C rank is in the operating state, the shutdown processing unit 26 causes the shutdown time of the application stored in the process priority storage unit 22 and the process startup history storage unit. How much time is required to complete the processing of each application in consideration of the average processing time stored in 23 and the CPU and I / O load states detected by the CPU and I / O load detection unit 24. Is calculated (S5).

It is determined whether the calculated time is within the supply time of the emergency power supply, that is, the maintenance time (S).
6) If it is within the maintenance time, stop processing is performed as it is (S7). If the end time has passed for some reason while performing this stop processing, or if it is determined in step S6 that the processing of each application does not end within the maintenance time, the shutdown processing unit 26 Outputs a stop request to the application having stop priority B (S9). Next, the shutdown processing unit 26 calculates the time required until the application of the priority C ends (S10). Then, if the end time of the application of the priority C has elapsed, the shutdown processing unit 26 outputs a stop request to the application of the stop priority C (S11, S12).

In the case of the present embodiment, the emergency power supply is added to the time required until the application of the priority C ends, plus the processing time for determining whether or not to stop the application of the priority B. It is enough to secure the capacity of.

[0021]

As described above, according to the present invention, in the stop processing when a power failure occurs, the starting state of the application and the load states of the CPU and the interface are taken into consideration,
Since the CPU and the interface are given priority to the application that is difficult to stop the process on the way, even if the application that requires a long time for the stop process is in the operating state, it is the minimum in relation to other applications. The processing of the application can be stopped in a limited time, and the capacity of the emergency power supply can be stopped to the necessary minimum.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a power failure management device according to the present invention.

FIG. 2 is a diagram showing an example of data stored in a process priority storage unit.

FIG. 3 is a diagram showing an example of data stored in a process start history storage unit.

FIG. 4 is an operation flowchart of the apparatus shown in FIG.

FIG. 5 is a schematic configuration diagram of a conventional power failure management device.

[Explanation of symbols]

10 ... Workstation, 12, 13, 14 ... Application, 16 ... Shutdown processing unit,
17 ... Operating system, 18 ... Uninterruptible power supply device, 20 ... Process monitoring unit, 22
... Process priority storage unit, 23 ... Process start history storage unit, 24 ... CPU, I / O load detection unit,
26 ... Shutdown processing unit.

Claims (1)

[Claims] 1. A detection means (18) for detecting a power failure state of a commercial power supply supplied to a computer system (10), and a power failure state detected by the detection means,
Switching means (18) for switching the power supply to the computer system from the commercial power supply to the emergency power supply, and the process storage means for monitoring the process of the application running in the computer system and updating and storing the state of this process as needed. (23), a priority storage means (22) for storing the priority of a process of an application running on the computer system, and a load state detection means (24) for detecting the load states of the CPU and interface of the computer system. When the power failure state is detected by the detection means,
In consideration of the state of the process stored in the process storage unit, the priority of the process stored in the priority storage unit, and the load state detected by the load state detection unit, the process currently being executed is executed. A power failure management device comprising: an execution control means (16) for controlling the execution sequence of the application programs so that the process of the application is completed within the maintenance time of the emergency power supply.