JPH01217523A - Switching system for duplicated information processor - Google Patents

Abstract

PURPOSE:To attain operation economically, smoothly and surely with simple constitution by respectively providing a diagnosis telegram transmitting part in a main body system device, which is presently used, a diagnosis telegram supervising part in the other main body system device and a switching device condition display part in a switching device. CONSTITUTION:A diagnosis telegram transmitting part 5 in a main body system device 1, which is presently used, transmits a diagnosis telegram periodically through a coupling route 4 between main bodies to an auxiliary main body system device 2 and sends a refresh signal (reset signal) to a switching device 3. The device 3 supervises the presence and absence of refresh signal reception with a constant time interval and when the refresh signal is interrupted, the circuit of an input and output is automatically switched to the side of the main body system device 2. On the other hand, the device 2 supervises the diagnosis telegram from the device 1 by a diagnosis telegram supervising part 6 and when the diagnosis telegram is interrupted for >= a constant time, a switching device condition display part 7 of the device 3 is supervised and trouble generation is judged in correspondence to the switching of the device 3. Then, back-up operation is executed. When the switching is not executed, the device 2 judges the trouble of the route 4 and executes a self-stop. Thus, the switching can be efficiently executed.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a switching method for an information processing device in which the main system device is duplicated, and aims to make the switching device economical and applicable to current use. A main body system device is provided with a means for periodically transmitting a diagnostic message to another main body system device via an inter-body connection path, and a switch is provided to the other main body system device when the diagnostic message is not received within a certain period of time. A method for investigating which main body system device the device connection has been switched to, and when it is recognized by this means that the circuit of the switching device is connected to the Shiraki system device side, the Japan system device is currently used. The present invention is constructed by providing means for causing the switching device to operate as a machine, and means for bringing the Japan System System into a stopped state when the above-mentioned means recognizes that the circuit of the switching device is connected to the other system system side.

[Industrial Application Field] The present invention has one system of main body system devices, and when a reset signal is not sent from the connected main body system device within a predetermined period of time, the other main body system device is automatically reset. Regarding the switching method of main body system devices in an information processing device configured to select one of the main body system devices of the above-mentioned system and use it as an active device by a switching device having the function of switching the connection to It concerns what can be realized economically in the configuration and the switching methods that can be achieved.

[Prior Art] FIG. 2 is a diagram showing an example of the configuration of a duplex information processing device, in which 51 and 52 represent main system devices, and 53 represents a switching device.

The figure shows that the main body system device 51 is currently used, and the contacts of the switching device 53 are connected to the main body system device 51 side.

The switching device 53 receives a reset signal that is emitted at a predetermined period of time from the connected main body device, and each time the reset signal arrives, it resets the timer and disconnects the connection. However, if the reset signal does not arrive even after a predetermined period of time has elapsed, the connection is automatically switched to the main body system device 52, which had been the standby system until then.

When the main body system device 51 fails due to a failure and goes down, or becomes in a loop state for some reason and is no longer able to perform its normal functions, this is detected as soon as possible, and the standby main system system is activated. This is a means for switching connections to devices and connecting system functions.

Therefore, the current main body system device must always transmit a reset signal to the switching device within a certain period of time.

Additionally, diagnostic information is transmitted and received between the main body systems 51 and 52 through the inter-main body coupling path 54, thereby performing a state Rh disconnection of the other main body system.

When the diagnostic information is sent, if there is no response within a certain period of time, it is assumed that a failure has occurred on the other side.
Issues a command (hereinafter also referred to as a switching command) instructing the switching device to connect the circuit to its own device. When the switching device receives the command, it switches the circuit to the side designated by the command.

When a failure occurs in the connection path 54 between main body system devices in FIG. It is recognized that this has occurred and the switching device 5
A switching command is issued to 3.

At this time, the switching device follows the instruction of the one that received the switching command first, but it will soon receive a switching command from the other main body system device, and the switching operation will be repeated.

To prevent such inconveniences, the main body system usually issues a lock command after issuing a switching command to prevent the switching device from repeatedly performing circuit switching operations.

[Problems to be Solved by the Invention] As mentioned above, in the conventional switching system of a duplex information processing device, the switching device was required to read various commands from the main system device and perform operations in accordance with the commands. There was a problem that it was expensive.

SUMMARY OF THE INVENTION In view of these conventional problems, it is an object of the present invention to provide a switching system that can achieve smooth and reliable operation using a switching device that can be realized economically with a simple configuration.

[Means for Solving the Problems] According to the present invention, the above objects are achieved by the means described in the claims.

That is, the present invention has two systems of main body systems, and when a reset signal is not sent from the connected main body system within a predetermined period of time, the connection is automatically switched to the other main body system. In an information processing device that is configured to select one of the two main body system devices described above by a switching device having a function and use it as an active device, one main body system device used as the active device is connected to the other main body system device through an inter-main connection path. A means for periodically transmitting a diagnostic message to the main body system is provided, and when the diagnostic message is not received within a certain period of time to another main body system, the connection of the switching device is switched to which side of the main body system. means for investigating whether the switching device is connected to the main system device side, means for causing the main system device to operate as the active device when it is recognized by the means that the circuit of the switching device is connected to the main system device side; This is a switching system for a redundant information processing device that includes means for stopping the main system device when it recognizes that the circuit of the device is connected to the other system device side.

[Function] In the switching method of the duplex information processing device according to the present invention,
When the current main body system fails, a reset signal cannot be issued to the switching device, so the circuit of the switching device automatically switches to the spare main body system, as in the conventional case.

At the same time, since the diagnostic message via the connection path between the main body system devices is interrupted, the standby main body system device detects the occurrence of a failure in the active main body system device and investigates the switching state of the switching device.

If the switching device has switched to its own device side, it will definitely recognize that the current main system device is the fault and will start operating as the current device.

On the other hand, when the diagnostic message via the inter-main unit coupling path is interrupted, the backup main system device will switch to the current device if the connection of the switching device is not switched to the own device side and the circuit is connected to the working side. It is determined that the failure is not in the main body system devices but in the connection path between the main body system devices. Due to a failure in the main system equipment interconnection path, the input/output information from the active system disappears, causing the information synchronization relationship with the active system to collapse, which will cause inconvenience if switching occurs thereafter, so this should be avoided. To prevent this, the status of the main body system device is displayed as stopped (down).

[Embodiment] Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention, in which 1 is an active main body system device, 2 is a backup main body system device, 3 is a switching device, and 4 is an inter-main body system device. 5 represents a connecting path, 5 represents a diagnostic message transmitting section, 6 represents a diagnostic message monitoring section, and 7 represents a switching device status display section.

In the same figure, the diagnostic message transmitter 5 of the main body system device 1 currently in use
periodically transmits a diagnostic message to the spare main body system device 2 through the inter-main body connection path 4, and at the same time sends a refresh signal (reset signal) to the switching device 3.

The switching device 3 monitors whether or not the refresh signal is received at fixed time intervals, and if the refresh signal is interrupted,
The input/output circuit is automatically switched to the main system device 2 side.

On the other hand, the standby main body system device 2 monitors the diagnostic message sent from the active main body system device 1 by the diagnostic message monitoring unit 6, and if the diagnostic message is interrupted for a certain period of time or more, the switching device 3
When the input/output circuit of the switching device 3 switches to the white wood device side by monitoring the switching device status display section 7, it is determined that a failure has occurred in the main system device 1, and backup operation is immediately started. At this time, if the switching device 3 is not switched to its own system even after monitoring the switching device 3 for a certain period of time, it is determined that there is a failure in the inter-body coupling path 4, and the main body system device 2 self-stops. At this time, the main body system device 1 cannot receive a response to the diagnostic message sent to the main body system device 2, so it determines that the main body system device 2 is at fault and enters the self-single operation state.

In any of the above cases, if the 100 main unit system is normal, either input/output data processing is performed by the current main unit 1 and the results are sent to the backup main unit 2, or the data is processed each time. The data may be transmitted to the standby main body system device 2 and perform the same processing as the current main body system device. And always keep the files of both systems consistent. However, if one of the main system devices fails, the files on both systems will be inconsistent, so even if the failed system recovers, it will not be possible to reinstall it into the current information processing system. Therefore, self-operation stop recognition is required. Therefore, if both systems are restarted at the same time for some reason (power outage, etc.) after one system is stopped, the initial state will be the same system configuration as before both systems were stopped, for example, rcPUX: down, CPUY single.
It is necessary to exchange such information with each other and completely restore the system status of both systems before reprocessing.

[Effects of the Invention] As explained above, according to the present invention, there are two main body system devices, and when a reset signal is not sent from the connected main body system device within a predetermined period of time, the reset signal is automatically reset. The above-mentioned switching device in an information processing device configured to select one of the two main body system devices and use it as an active machine by a switching device having a function of switching the connection to the other main body system device in a simple configuration. There are economic possibilities and benefits that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the configuration of a duplex information processing device. 1.2...Main system device, 3...Switching device, 4...Connection path between main bodies, 5...Diagnostic message transmitter, 6... ... Examination! yr telegram monitoring department,
7...Switching device type FJ, display department representative Patent attorney Sada Igata - Connection route between the main body Indication of the essence of the firing line on the first day of the opening ceremony 7 Diagram 2 of the configuration of the input/output duplex information processing device (columns are shown)

Claims (1)

[Claims] It has two systems of main body systems, and when a reset signal is not sent from the connected main body system within a predetermined period of time, the connection is automatically switched to the other main body system. In an information processing device that is configured to select one of the two main body system devices and use it as an active device by a switching device having a function, one of the main body system devices used as an active device is connected to the other main body system device through an inter-main connection path. A means for periodically transmitting a diagnostic message to the main body system is provided, and when the diagnostic message is not received within a certain period of time to another main body system, the connection of the switching device is switched to which side of the main body system. means for checking whether the switching device is connected to the main system device side; 1. A switching method for a redundant information processing device, characterized in that the device is provided with means for stopping its own main body system when it recognizes that a circuit of the device is connected to another main body system.