JPH0514447A - Communication line recovery device - Google Patents

Abstract

PURPOSE:To operate the entire system without stopping the system by disconnecting a communication line having a fault and implementing the recovery processing. CONSTITUTION:When a fault takes place in, e.g. a communication line 7a during the operation of communication lines 7a, 7b, 7c, a communication control program 2 starts a communication line disconnection device 3 to disconnect a block corresponding to the communication line 7a having the fault from a chain of a system management table and to implement degenerating operation. The program 2 similarly a communication line initializing device 4 to start initializing processing to the communication line 7a having the fault. The communication line initializing device 4 initializes the block corresponding to the communication line 7a disconnected and re-loads a communication firmware 6a corresponding to the communication line 7a from a disk or the like. Then the communication line initializing device 4 starts a communication line integration device 5 to chain the block corresponding to the initialized communication line 7a to the system management table again thereby restarting the operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication line recovery mechanism, and more particularly to a recovery mechanism for a communication line in which a failure has occurred in a communication control program for simultaneously controlling a plurality of communication lines.

[0002]

2. Description of the Related Art In the conventional communication control program, when there is a command sequence deviation from the communication control firmware or a table managed in the communication control program is destroyed, there is no method for dealing with it, and the system is down. I was there.

[0003]

In the above-mentioned conventional communication control program, even in one communication line, a failure occurs such as a command sequence deviation from the communication firmware and a management table in the communication control program being destroyed. If this happens, the system will go down, and other normally operating communication lines will also go down, and this will have a great impact on other application programs that are performing other batch jobs. The larger the system, the greater the obstacles to user operations.

[0004]

The communication line recovery mechanism in the communication control program of the present invention is a communication line disconnection mechanism for temporarily disconnecting the communication line from the system when a failure such as system down occurs. ,
It has a communication line initialization mechanism that initializes the separated communication line and a communication line incorporation mechanism that re-installs the initialized communication line in the system.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention includes a communication line disconnecting mechanism 3 in a conventional communication control program 2.
, Communication line recovery mechanism 4, communication line incorporation mechanism 5
It is realized by adding and. The communication control program 2 controls the communication lines 7a, 7b, 7c via the communication firmwares 6a, 6b, 6c.

Next, the operation of FIG. 1 will be described with reference to FIG.

During operation of the communication lines 7a, 7b, 7c, for example, a failure such as a command sequence deviation from the communication firmware or a system management table (not shown) managed in the communication control program 2 in the communication line 7a. If the error occurs, the communication control program 2 activates the communication line disconnecting mechanism 3 in step 21, and disconnects the block corresponding to the failed communication line 7a from the chain of the system management table in step 22 to perform the degenerate operation. At the same time, in step 23, the communication line initialization mechanism 4 is activated to start the initialization process for the communication line 7a in which the failure has occurred.

In the communication line initialization mechanism 4, step 24
In step 25, the block corresponding to the communication line 7a separated from the system management table is initialized, and in step 25, the communication firmware 6a corresponding to the communication line 7a is reloaded from the disk or the like.

Thereafter, in step 26, the communication line incorporation mechanism 5 is activated, and the block corresponding to the initialized communication line 7a is chained again in the system management table in step 27 to resume the operation.

[0011]

As described above, according to the present invention, only a communication line in which a failure has occurred, which is conventionally caused by system down, is temporarily disconnected from the system to perform degenerate operation, and at the same time, a communication line in which a failure occurs is recovered. By performing the processing, there is an effect that the entire system can be operated without stopping.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart of recovery processing in the embodiment of FIG.

[Explanation of symbols]

 1a, 1b, 1c Application program 2 Communication control program 3 Communication line disconnection mechanism 4 Communication line initialization mechanism 5 Communication line incorporation mechanism 6a, 6b, 6c Communication firmware 7a, 7b, 7c Communication line

Claims (1)

Claim: What is claimed is: 1. A communication line disconnecting mechanism for temporarily disconnecting a communication line in which a failure has occurred from a system, a communication line writing mechanism for initializing the disconnected communication line, and an initial stage. And a communication line incorporation mechanism for re-embedding the communication line, which has been subjected to the digitalization processing, in the system.