JPH04128911A - Automatic start switching system for electronic computer system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic startup method for a computer system, and particularly relates to an automatic system startup switching method when a configuration change of the computer system occurs. .

[Conventional technology]

Generally, the startup method for a computer system is as follows:
A cold start method and a warm start method (also referred to as a hot start method) are known.

The cold start method involves building a system by turning on the power to the computer system from a blank slate with no assets, such as when starting up a newly installed computer system for the first time. The steps to start up are complicated and it takes a long time to start up. On the other hand, in the warm start method, for example, when starting a computer system that was stopped the previous day, the next morning, the assets accumulated from the previous time remain.
This method refers to the method of starting by taking over the assets, and the steps to complete the start-up are easy and the start-up time is short.

Conventionally, there is a method described in Japanese Unexamined Patent Application Publication No. 126707/1983 as a method for switching the start-up method of a computer system, but this method automatically initializes memory when a program is not registered. However, there is no known device that initializes memory in response to system configuration changes.

[Problem to be solved by the invention]

Conventionally, a cold start method and a warm start method are known, but since the cold start method takes a long time to start up, the warm start method is usually used for startup.

However, conventionally, when a part of the system configuration is changed, such as when a terminal is added or a module is added (a module for version upgrade, etc.), the warm start information before the change is There was a problem that a warm start could not be performed because the execution environment after the change did not match. Conventionally, no consideration was given to such problems, so when the system configuration is changed, execution parameters, etc. (for example,
JCL; Job Control Language
ge, etc.) and a manual cold start, resulting in the problem of increased manual work.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to start up using the warm start method when there is no change in the system configuration, and to use the cold start method when there is a change in the system configuration. To provide an automatic start-up switching method for a computer system in which the start method is automatically switched without human intervention so that the start-up is performed in the following manner.

[Means to solve the problem]

In order to achieve the above object, the automatic startup switching method of the computer system of the present invention compares pre-stored warm start information with the latest system configuration definition information, and if the comparison results match, The present invention is characterized in that it includes means for automatically switching the start method so that startup is performed using a warm start method, and when the comparison results are different, startup is performed using a cold start method.

[Effect]

The effect based on the above configuration will be explained.

When a computer system is started by a cold start, necessary information for the system configuration, that is, system configuration information (for example, creation date and time of configuration definition information, program version, revision, etc.) is stored when performing a subsequent warm start. Store it as warm start information for (.

Then, when performing a subsequent warm start, the stored warm start information is compared with the latest system configuration definition information (that is, the current execution environment).

If there is no change in the system configuration (version upgrade, addition of a terminal device, etc.), the above comparison results match, so in this case warm start is selected and startup is performed. On the other hand, when there is a system configuration change (
If the execution environment changes), the above comparison results will be inconsistent, and in this case, the system will automatically switch to the cold start method and start up without any human intervention.

As a result, it is possible to reduce the number of manual steps such as changing execution parameters, and it is possible to prevent system malfunctions due to human errors.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram of an online system of distributed processors to which this embodiment is applied.

The online system has a distributed processor 101 that functions as a repeater, and the distributed processor 101 is connected to host computers 102a at various locations via communication lines.

..., 102b, and other similar distributed processors (distributed machines) 101a, and the terminal devices 104, 104 . ... and the printer 105, and the user file 103. It has a warm start file 106 and a configuration definition file 107 so that these files can be used.

How to start up the online system shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. 2.

Once the online system is started (step 201
), the configuration file 107 is opened, and the warmstart file 106 is opened (
Step 202). Warm start information 300, an example of which is shown in FIG. 3, has been previously written in the warm start file 106 during a previous cold start, and this warm start information 301 is read (step 203). Also, the configuration definition information 400 and function definition information 450 in the format shown in FIG. 4(a) (bl) are read from the configuration definition file 107 (step 204). It corresponds to the configuration and function, and if there is a change in the system configuration or function, it will be the changed version. Therefore, by combining these configuration definition information IIJ400 and function definition information 450, the system execution environment information This configuration definition information 400 consists of configuration definition assembly date and time 401, configuration definition assembly time 402, configuration definition version/revision 403, configuration definition file update information 404, and other configuration definition information 405. , function definition information 450 includes function assembly date 451, function definition information assembly time 452, OCP version/revision 453, and program maintenance code (SUT number).
454 and other function definition information 455.

On the other hand, as described above, the warm start information 300 shown in FIG. 3 is written in the warm start file 106 in advance during a previous cold start. This warm start information 16300 is shown in Figure 4(a) (
It almost corresponds to the configuration definition information 400 and function definition information 450 in b), and includes a configuration definition file identifier 301, function definition assemble date 302, function definition assemble time 303, configuration assemble date 304, configuration assemble time 305, and configuration. It includes definition version/revision 306, configuration definition file update information 307, warm start file write flag 30B, OCP version/revision 309, program maintenance load (SUT number) 310, and other warm start information 311.

Therefore, the read warm start information 300 is combined with the read configuration definition information 400 and function definition information 450.
Each item is determined as shown in FIG. 5 by comparing it with the execution environment information consisting of (step 205).

That is, is the configuration definition file identifier 301 in FIG. 3 correct as information (item 501)? Do the function definition assembly dates 302 and 451 in FIGS. 3 and 4 (g) match (item 502)? Function definition assembly time 3
Do 03 and 452 match (item 503)? Configuration definition assembly dates 304 and 401 in Figures 3 and 4 (a)
do they match (item 504), do the configuration definition assemble times 305 and 402 match (item 505), and do the configuration update information 307 and 404 match (item 506)?
), configuration definition version revisions 306 and 403
do they match (item 507), and is the warm start file write flag 308 in Figure 3 turned off (item 508), 0 in Figures 3 and 4)?
A comparison is made to determine whether the versions/revisions 309 and 453 of the CP (online control program) match (item 509), and whether the program maintenance codes 310 and 453 match (item 510).

In this step 205, if all items 501 to 510 match (satisfy), it is determined that there has been no configuration change, the memory is initialized according to the contents of the warm start file 106, and a warm start is performed according to the previous warm start information. Startup is performed (210). In step 205, if there is a mismatch in even one item, the process is automatically switched to cold start (step 206 and subsequent steps). That is, when switching to a cold start, the memory as an online system is initialized according to the information in the configuration file (execution environment shown in FIG. 4 (al (b)) (step 206). This initialized information is , is written to the warm start file 106 and used as warm start information for the next startup (step 207).The user file 103 is then opened (step 208), and online operations are started (step 207).
Step 209).

As described above, if there are no changes to the system configuration functions and the execution environment remains the same, the system will start up with a warm start, but if there are changes to the system configuration functions and the execution environment changes, the system will automatically start with a cold start. can be switched to

〔Effect of the invention〕

As described above in detail, according to the automatic startup switching method in the computer system of the present invention, startup is completed in a relatively short time when the system configuration and functions are unchanged and the execution environment is unchanged. Startup is performed using the warm start method, and when there is a change in the system configuration or function and the execution environment changes, startup is performed using the cold start method.
Since the startup method is automatically switched, the startup method can always be automatically switched to a startup method suitable for the execution environment.

Therefore, there is no need to artificially change the execution parameters or manually switch the start method (it is possible to prevent system malfunctions due to human error).

[Brief explanation of drawings]

Figure 1 is a schematic configuration diagram of an online system to which the present invention is applied, Figure 2 is a flowchart of system startup processing in the online system to explain an embodiment of the present invention, and Figure 3 is a warm start file. FIG. 4 is a configuration diagram of an example of the format of the stored warm start information. FIG. 4 is a configuration diagram of an example of the format of configuration definition information and function definition information in the configuration definition file. FIG. 5 is an example of warm start judgment items. It is a diagram. 101, 101 a --- Distributed processor,
102a, 102b...Host computer, 10
3... User file, 104... Terminal device, 105... Printer, 106...
...Warm start file, 107...Configuration definition file, 300...Warm start information, 400...Configuration definition information, 450...
...Function definition information. Figure 2

Claims (1)

[Claims] 1. Compare the pre-stored warm start information with the latest system configuration definition information, and if the comparison results match, start up using the warm start method; if the comparison results differ, An automatic startup switching method for a computer system, characterized by comprising means for automatically switching the startup method so that startup is performed using a cold start method.