JPH07141216A - System constitution altering process system - Google Patents

Abstract

PURPOSE:To restart on-line service as soon as CPUs are switched irrespective of the frequency of constitution alteration in normal operation by updating the system constitution information table of a stand-by system CPU on the basis of alteration information sent out of an execution system CPU when the alteration information is inputted. CONSTITUTION:When a constitution alteration command is inputted from a console 3, a command acceptance part 11 in the execution system CPU 1 analyzes the command, generates the alteration information indicating alteration of system constitution, and supplies the alteration information to a system constitution information altering process part 12 and an alteration information sending-out part 14a. And, an alteration information acceptance part 21a in the stand-by system CPU 2 receives the sent-out alteration information and supplies it to a system constitution information altering process part 22. According to the information, the system constitution information altering process part 22 updates constitution information stored in the system constitution information table 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system configuration change processing method, and particularly to a standby system CP for restarting hot standby.
The present invention relates to a system configuration change processing method in an online data processing system including U.

[0002]

2. Description of the Related Art Conventionally, when a configuration change command is input from the console while the system is operating, the system configuration information is corrected, the change information is stored in the auxiliary storage device as change history information, and the system is restarted. In this case, there has been a system configuration change processing method in which the system configuration information is always updated by automatically changing the system configuration information by sequentially referring to the change history information accumulated as described above (Japanese Patent Laid-Open Publication No. Sho. 63-15626
4 gazette).

FIG. 4 is a system configuration diagram showing an example of a conventional system configuration change processing method. The system shown in FIG. 4 is an online data processing system having a standby CPU for restarting hot standby. In a state where this system is normally operating (a state in which the executing system CPU 1 is in the process of online work and the standby system CPU 2 is in standby for hot standby), the console 3 is executed by the console 3.
When a configuration change command is input to U1, the command receiving unit 11 analyzes the command and generates change information instructing a change in the system configuration, and writes this change information in the system configuration information change processing unit 12 and the change history information. Give to part 14. In response to this, the system configuration information change processing unit 1
2 updates the configuration information stored in the system configuration information table 13, and the change history information writing unit 14 writes the change information in the auxiliary storage device 4. Auxiliary storage device 4
Holds the change history information in which the change information output from the change history information writing unit 14 is sequentially accumulated (processing operation indicated by a solid arrow in the figure).

When a failure occurs in the active CPU 1, the system is in an emergency state due to CPU switching (the active CPU 1 is interrupting processing or failure recovery processing, and the standby CPU 2 is in the process of online work). ). At the beginning of this transition, the standby system CPU 2 performs a process of updating the system configuration information to the latest state. That is, the change history information reading unit 21 in the standby CPU 2
Reads the change information sequentially from the change history information held in the auxiliary storage device 4 as described above, and instructs the system configuration information change processing unit 22 to change the configuration.
The system configuration information change processing unit 22 updates the configuration information stored in the system configuration information table 23 to bring the system configuration information to the latest state (processing operation indicated by a dashed arrow in the figure).

In Japanese Patent Laid-Open No. 3-48942, there is also proposed a method in which the standby CPU obtains the latest network configuration information from the communication management device when the CPU is switched.

[0006]

However, in the above conventional system configuration change processing method, the execution system CP is used.
Since the standby system CPU2 needs to change the system configuration information at the initial stage of the CPU switching from the U1 to the standby system CPU2, there is a time lag between the start time of the CPU switching and the original restart time of the online business. There was a problem that the restart of the online service was delayed.

Particularly, when the CPU is switched using the change history information held in the auxiliary storage device 4, the execution system C is used.
The time lag becomes longer as the number of times the configuration is changed increases because the configuration is frequently changed while the PU 1 is continuously operating for a long time, and the delay in restarting the online service appears more significantly. There was a problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and to make it possible to restart the online service as soon as CPU switching occurs regardless of the frequency of the configuration change during normal operation. To provide a processing method.

[0009]

In order to achieve the above object, in the system configuration change processing method of the present invention, the execution system CPU that provides online service during the normal operation and the execution system CPU become inoperable. And a standby CPU that restarts the online service when hot standby is performed. The executing CPU is configured to change the system configuration from the configuration change command when an external configuration change command is input. Information is generated, the change information is sent to the standby CPU, and the system configuration information table in the executing CPU is updated based on the change information, and the standby CPU is sent from the executing CPU. When the change information to be input is input, the system configuration information in the standby CPU is based on the change information. It is intended to update the table.

[0010]

The operation based on the above configuration will be described.

In the system configuration change processing method of the present invention,
Execution system CPU that provides online services during normal operation
And a standby CPU that restarts the online service in hot standby when the active CPU becomes inoperable, and the active CPU is configured to operate when the configuration change command is input from the outside. Generating change information instructing to change the system configuration from a configuration change command, sending the change information to the standby CPU, and updating the system configuration information table in the executing CPU based on the change information; The standby system C
When the change information sent from the execution CPU is input, the PU updates the system configuration information table in the standby CPU based on the change information.

Therefore, the active CPU and the standby C
The system configuration information table in the PU always has the same content, and the standby CPU always has the latest system configuration information. Therefore, regardless of the frequency of the configuration change during normal operation, immediately after the CPU switching occurs. You can restart the online service.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the system configuration change processing method of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the system configuration change processing method of the present invention. The system shown in FIG. 1 is an online data processing system having a standby CPU for restarting hot standby. In FIG.
The same reference numerals are given to the same components as, and the description thereof will be omitted. In addition, 14a is the execution system CPU 1 during normal operation.
A change information sending unit for sending change information from the change information sending unit 14a sends the change information sent from the change information sending unit 14a to the standby CP.
It is a change information receiving unit that receives in U2.

In the standby CPU 2 in FIG. 1, preparation processing for restarting hot standby is performed when the standby online service is activated. At this time, the system configuration information defined at the time of system generation is expanded on the virtual storage device in the standby CPU 2 and becomes the system configuration information table 23 in the initial state. When the preparation process for restarting hot standby is completed, the standby online service is interrupted, and a standby state is prepared to prepare for a failure of the active CPU 1. Also in the executing system CPU 1, the system configuration information defined at the time of system generation at the start of the online service is expanded on the virtual storage device, and this is the system configuration information table 13 in the initial state.
Becomes

When a configuration change command is input from the console 3 in this state, the command reception unit 11 in the active CPU 1 analyzes the command and generates change information for instructing the system configuration change. It is given to the system configuration information change processing unit 12 and the change information sending unit 14a. In response to this, the system configuration information change processing unit 12 updates the configuration information stored in the system configuration information table 13, and the change information sending unit 14a sends the change information from the active CPU 1. Then, the change information receiving unit in the standby CPU 2 receives the sent change information and gives it to the system configuration information change processing unit 22. In response to this, the system configuration information change processing unit 22 updates the configuration information stored in the system configuration information table 23 (processing operation indicated by a solid arrow in the figure).

FIG. 2 is a diagram showing an embodiment of the configuration change in the system of FIG. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Further, 31 is an example of a configuration change command, 131 and 132 are stored contents of the terminal management table group before and after the configuration change in the system configuration information table 13 in the active CPU 1, 2
Reference numerals 31 and 232 are stored contents of the terminal management table group before and after the configuration change in the system configuration information table 23 in the standby CPU 2. The configuration change command 31 (“ADD TERMINAL, T103”) in this embodiment indicates that a terminal device (“TERMINAL”) having an identification name of “T103” is added (“ADD”) as a system component. When this command is input to the console 3, the terminal management table "T10" is added to the system configuration information tables of the active CPU 1 and the standby CPU 2.
3 ”is additionally registered. The configuration change command can be used to delete system components and change their attributes.

FIG. 3 is a diagram showing a processing flow for changing the system configuration by the system of FIG. 1. FIG. 3 (a) shows the processing flow of the active CPU 1 and FIG. 3 (b) shows the standby CPU.
The two processing flows are shown respectively.

In FIG. 3A, in step 101, a grammatical check regarding the format and a semantic check regarding the contents are performed for the configuration change command input from the console, and it is determined in step 102 whether or not there is an error.
If an error is detected as a result, step 108 is performed.
After the error message is output by, the system configuration change process ends. If no error is detected, the change information generated from the configuration change command in step 103 is sent to the standby CPU 2 and then step 10
In step 4, the system configuration information is rewritten based on the change information. In the following steps 105 and 106, after waiting until there is a response from the standby CPU 2 to the change information sent in step 103, it is determined in step 107 whether or not there is an error. If an error is detected as a result, after outputting an error message in step 108,
The system configuration change processing ends. If no error is detected, the system configuration changing process is terminated.

In FIG. 3B, in steps 201 and 202, after waiting until the change information is sent from the active CPU 1, the presence or absence of an error is determined in step 203.
If no error is detected as a result, the system configuration information is rewritten based on the change information sent from the executing CPU 1 in step 204, and then the execution CPU 1 is informed that the processing is completed in step 206. Notify and finish the system configuration change process. If an error is detected, an error message is output in step 205 and the execution system CPU 1 is notified of the occurrence of the error, and then the execution system CPU 1 is notified of the completion of the process in step 206 and the system configuration is established. The change process ends.

As described above, according to the present embodiment, the active system CPU that provides the online service during the normal operation and the standby system that restarts the online service when the active system CPU becomes inoperable The execution CPU, when a configuration change command is input from the outside, generates change information for instructing a change of the system configuration from the configuration change command, and the change information is stored in the standby CPU. And the system configuration information table in the active CPU is updated based on the change information, and the standby CPU receives the change information sent from the active CPU when the change information is input. Since the system configuration information table in the standby CPU is updated based on the change information, System configuration information table in the system CPU and standby CPU always become the same contents,
Since the standby CPU always has the latest system configuration information, the online service can be restarted immediately when the CPU switching occurs regardless of the frequency of the configuration change during normal operation.

[0022]

As described above in detail, according to the system configuration change processing method of the present invention, the execution system CPU that performs online service during normal operation, and the execution system CPU
And a standby CPU that restarts the online service in hot standby when the configuration change command is input from the outside. Change information for instructing change of the standby system CPU, sending the change information to the standby CPU, and updating the system configuration information table in the executing CPU based on the change information. The execution system CP
When the change information sent from U is input, the system configuration information table in the standby CPU is updated based on the change information. Therefore, the system in the active CPU and the system in the standby CPU The configuration information table always has the same contents, and the standby CP
Since U always has the latest system configuration information, regardless of the frequency of configuration changes during normal operation, C
The effect is that the online service can be restarted immediately when the PU switching occurs.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a system configuration change processing method of the present invention.

FIG. 2 is a diagram showing an example of a configuration change in the system of FIG.

FIG. 3 is a diagram showing a processing flow of system configuration change by the system of FIG.

FIG. 4 is a system configuration diagram showing an example of a conventional system configuration change processing method.

[Explanation of symbols]

 1 Execution system CPU 2 Standby system CPU 3 Console 11 Command reception part 12, 22 System configuration information change processing part 13, 23 System configuration information table 14a Change information transmission part 21a Change information reception part

Claims (1)

[Claims] 1. A running system CPU that provides online services during normal operation, and a standby system CP that restarts the online service by hot standby when the running system CPU becomes inoperable.
U, the execution system CPU generates change information for instructing a system configuration change from the configuration change command when a configuration change command is input from the outside, and the change information is stored in the standby system CPU. And the system configuration information table in the execution system CPU is updated based on the change information, and the standby system CPU, when the change information transmitted from the execution system CPU is input, A system configuration change processing method characterized by updating a system configuration information table in the standby CPU based on the change information.