JPS62229332A - Control system for fault recovery of information processor - Google Patents

Abstract

PURPOSE:To attain a common processing procedure for recovery of fault by using a processing group containing plural processing units to define an element needed for recovery of the fault and setting the concrete information on said element at a processing start time point through each processing unit. CONSTITUTION:When a control table and a lock are needed as the elements for recovery of a fault in a processing group 1, a processing unit A starts its processing to set the initial value of a control table to be updated and the lock information within a memory area Ta. Then the unit A carries out the normal processing. When a processing unit B is called out, the initial value of the control table to be updated and the lock information are set to a memory area Tb. Then the unit B carries out the normal processing. If a fault occurs while the unit B is working, a cancel control part 2 is called out and extracts the information on the control table out of the area Tb. Then an initial state is reset and the lock state is released after the lock information is extracted. So is with the unit A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a failure recovery control method in an information processing device.

[Conventional technology]

In the conventional fault recovery 111m method of this type, the recovery method varies depending on the timing of the fault and the type of fault, so it is necessary to determine the type of fault, check the timing of the fault, and perform recovery processing corresponding to each. It was necessary to do this.

[Problem that the invention seeks to solve]

In such conventional methods, in order to perform sufficient recovery, the recovery processing procedure must be changed depending on the content of the process to be recovered and the type of failure that may occur, so various recovery processing procedures are created. Moreover, there is a problem in that it is necessary to memorize a huge number of recovery processing procedures.

[Means for solving problems]

The method of the present invention is a failure recovery control method for an information processing device that executes at least one processing group consisting of a plurality of processing units in a hierarchical structure, in which elements necessary for failure recovery are defined in advance, and each processing unit is A storage area corresponding to a processing unit that stores the state of the element immediately before processing started, and when a failure occurs, the information in the storage area is used to return the element to the state immediately before the start of the processing unit being executed and interrupt the processing unit that is currently being executed. The present invention is characterized in that only the processing unit in which the failure has occurred is interrupted.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, which includes a processing group 1 having processing units A and B. FIG.

A cancellation control unit 2 is provided for recovering the processing unit being executed and canceling the processing when a failure occurs.

Processing units A and B are areas Ta that store information for recovery.
-Tb, and the processing unit B has processing jN-
(i This is a subroutine called during the processing of A.

Next, details of the control procedure will be explained using FIG.

Here, it is assumed that a control table and a lock are required as elements during failure recovery of processing group l.

First of all, when processing unit A starts processing, storage area T
Information on the initial value of the control table to be updated and information on the lock to be used are stored in cell a.Next, normal processing starts, and eventually processing unit B is called.Processing unit B also becomes processing unit A. Similarly, first, information on the initial value of the control table to be updated and information on the lock to be used are set in the storage area Tb.

Next, if a failure occurs during execution of the 9th processing vehicle position B, which starts normal processing, the cancel control unit 2 is called. FIG. 2 shows a flowchart of the control procedure of processing by the cancellation control section 2. First, information regarding the control tables is extracted from the storage area Tb, and each control table is returned to its initial state before being updated by the processing unit B. J.A.
The information that flashes to the lock is collected from Tb and the lock used by processing unit B is released.

Next, the processing of the processing unit B that is being executed is canceled and control is returned to the processing unit A that called the processing unit B. When control returns to processing unit A, processing unit A determines that processing unit B was not successfully executed, and determines the next process.

In the above embodiment, processing group 1 is composed of two-level processing units A and B, but in the case of an embodiment composed of processing units of three or more levels, when a failure occurs in each processing unit, The processing procedure is the same as the above-described processing procedure for processing unit B.

Further, in the above embodiment, there is only one processing group, but the present invention is not limited to this, and there may be two or more processing groups.

[Effects of the Invention] As explained above, according to the present invention, elements necessary for failure recovery are defined in a processing group having a plurality of processing units, and each processing unit receives specific information regarding those elements. By setting this in the recovery information area at the start of processing, there is an effect that the fault recovery processing procedure can be performed in common for all processing units.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG. 2 is a flow chart of the control procedure of the cancellation control section 2 in this embodiment. ■... Processing group, 2... Cancellation control unit, A, B... Processing unit, Ta, Tb.
...Storage area. 2nd mouth

Claims (1)

[Claims] In a failure recovery control method for an information processing device that executes at least one processing group consisting of a plurality of processing units in a hierarchical structure, elements necessary for failure recovery are defined in advance, and each processing unit a storage area corresponding to the processing unit that stores the state of the element immediately before the start of processing; and a storage area corresponding to the processing unit that stores the state of the element immediately before the processing unit starts; 1. A failure recovery control method for an information processing apparatus, characterized in that a canceling means is provided for suspending a processing unit and returning to a calling processing unit, and suspending only a processing unit in which a failure has occurred.