JPS62257540A - System for restoring constitution of data processing system - Google Patents

Abstract

PURPOSE:To automatically restore a data processing system when the system is stopped for some reason so as to reduce the overhead required for making restoring processes, by providing a system changing hysteresis file of a magnetic disk, etc., which stores the changing hysteresis of the constitution of the system. CONSTITUTION:In case when addition, deletion, change, etc., of a system constitution become necessary while the system is operated, a system constitution change is requested through an operator command 2. After processing the request, the command 2 is stored in a system changing hysteresis file 11. If the system is restored after the system is stopped for some reaction thereafter, contents of the system constitution changes performed during the operation are successively reexecuted in accordance with the commands stored in the system changing hysteresis file 11 and, finally, the same system constitution as that when the system is stopped is restored. Therefore, the overhead required when making restoring processes is reduced and the working ratio of the system can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a configuration recovery method for a data processing system, and particularly to a configuration recovery method suitable for an online system that operates for a long time.

[Conventional technology]

In the data processing system t1, when the system stops due to a failure etc., the memory that stores the system configuration information is also cleared, so in the subsequent recovery process, the system configuration information at the time of system startup is reloaded and You need to return the system configuration to the state it was in.

On the other hand, in online systems that operate for long periods of time,
Adding resources (databases, terminals, etc.) while driving,
Deletion, etc. may be necessary, and the system configuration is often changed from when the system was started. In such a system, even if the system configuration information at the time of system startup is reloaded in recovery processing after the system is stopped due to a failure or the like, the system configuration before the system stop cannot be recovered.

In such a case, conventionally, the system configuration before the shutdown was achieved by creating new system configuration information through operator intervention and then loading it.

Please note that regarding system configuration changes while online, please refer to the BIT special issue ``Latest Database Systems and Their Applications'' (
It is discussed on page 53 of Kyoritsu Publishing Co., Ltd., published on January 1, 1982).

(Problems to be Solved by the Invention) In the conventional technology, when 41 configuration changes are made to the system during operation and the system is subsequently stopped for some reason,
The recovery process automatically restores the system to the post-configuration state (
There is no consideration given to the point of recovery to the state before the shutdown, and the need for operator intervention increases the time required for one recovery process, which poses a problem, especially in online systems, in that it interferes with online operations.

An object of the present invention is to automatically restore the system configuration to the state after the change when the system configuration is changed during operation and then the system is stopped for some reason, thereby reducing the overhead of recovery processing. There is a particular thing.

[Means for solving problems]

The above object is achieved by providing a system change history file such as a magnetic disk that stores the history of system configuration changes during system operation.

[Operation] If it becomes necessary to add, delete, or change the system configuration during system operation, an operator command requests the system configuration change.

After processing this request, store the command in the system change history file. When restoring the system after it has stopped for some reason, the system configuration changes that were made during operation can be sequentially re-executed using the commands stored in the system change history file. to restore the same system configuration as it was when the system went down.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a functional block diagram of an embodiment of the present invention. In FIG. 1, a data processing device 1 includes a tank configuration change command analysis processing section 2. It has a resource correspondence table addition processing section 3, a resource correspondence table modification processing section 4, a resource correspondence table deletion processing section 51M, a history information storage processing section 6, a state recovery processing section 7 at the time of system recovery, and a resource correspondence table 8. An operator command input device 9, a system configuration file 10, and a system change history file 11 are connected to this data processing device 1. For example, an external storage device such as a magnetic disk device is used for the system configuration file 10 and the system change history file 11.

When starting up the system, the data processing device 1 initially loads the system configuration information in the system configuration file 10 into the resource correspondence table 8, and builds the system accordingly. FIG. 2 is a specific example of the resource correspondence table 8, and shows the data processing unit b'! A terminal correspondence table 81, a line correspondence table 82, and a database correspondence table 83 are prepared corresponding to each resource of the terminal, line, and database connected to the terminal 1.

When it becomes necessary to add, change, or delete a terminal, line database, etc. during operation of the data processing system, the operator inputs a configuration change request command using the operator command input device 9.

As shown in Figure 3, the configuration change request command includes configuration change events (addition, deletion, change, etc. of terminals, lines, databases, etc.), names (one target terminal line, database name), and attributes (e.g. (terminal type, line type, etc.) The configuration change command analysis processing unit 2 of the data processing device 1 analyzes the configuration change request command input from the operator command input device 9, and processes the resource correspondence table addition processing unit 3 in response to additions, changes, and deletions. Control is passed to the resource correspondence table change processing section 4 or the resource correspondence table deletion processing section 5. For example, when adding a terminal, the resource correspondence table addition processing unit 3 registers the terminal name and terminal attributes in the configuration change request command in the empty area of the terminal correspondence table 81, and associates them with the additional resource.

When changing the terminal, update the resource correspondence table.
The ring unit 4 changes part or all of the contents of the corresponding entry in the terminal correspondence table 81. When deleting a terminal, the corresponding entry in the terminal correspondence table 81 is invalidated. The same applies when adding, changing, or deleting lines/databases.

The processing results of the source correspondence table addition processing section 3, resource correspondence table modification processing section 4, and resource correspondence table deletion processing section 5, which will be described below, are notified to the history information storage processing section 6. The history information storage processing unit 6 generates history information based on the processing result and stores it in the system change history file 11.
are stored in chronological order. The history information stored in the system history file 11 is basically the same as the configuration change request command shown in FIG.

Then, after the system stops due to some factor,
When restarting operation, the system configuration information in the system configuration file 10 is reloaded into the resource correspondence table 8. On the other hand, the state recovery processing section 7 sequentially reads the history information of the system change history file 11 and transmits it to the configuration change command analysis processing section 2. The configuration change command processing unit 2 analyzes the history information in the same manner as the operator command (configuration change request command) from the operator command input device 9, and sends each resource correspondence table addition processing unit 3. Control is passed to the change processing section 4 or the deletion processing section 5. In this way, by processing the contents of the system change history file 11 through the route of status recovery processing unit 7 → configuration change command analysis processing unit 2 → resource correspondence table addition/change/deletion processing unit 3, 4.5, The resource correspondence table 8 is restored to the state it was in when the system was stopped, and the system is accordingly restored to the same configuration as when it was stopped.

〔Effect of the invention〕

According to the present invention, even if the configuration of a data processing system is changed during operation and the system is subsequently stopped for some reason, it is possible to automatically restore the configuration to the changed state without operator intervention. Therefore, the overhead of recovery processing can be reduced and the system operation rate can be increased.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing a specific example of a resource correspondence table, and FIG. 3 is a diagram showing a format 1 example of a configuration change request command. DESCRIPTION OF SYMBOLS 1... Data processing device, 2... Configuration change command analysis processing part, 3... Resource correspondence table addition processing part, 4... Resource correspondence table change processing part, 5
... Resource correspondence table deletion processing section, 6. History information recording processing section, 7. Status recovery processing section, 8.
... Resource correspondence table, 9... Operator command input device, 10... System configuration file,
11...System change history file. Representative Patent Attorney Makoto Suzuki 1, Ge, 1 Figure 2

Claims (1)

[Claims] (1) In a data processing system whose system configuration can be changed during operation, a storage means is provided to store change history information of the system configuration changed during operation, and in recovery processing after a system stop due to a failure etc. A configuration recovery method for a data processing system, characterized in that the change history information in the storage means is sequentially read and executed to recover the system configuration at the time of system stop.