JP2698074B2 - A method of changing station data of a processor in a multiprocessor system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing station data in a multiprocessor system without interrupting system processing. When changing the station data in the main memory according to the change of configuration conditions, even if a failure occurs in a certain processor, the processor that stops system processing is limited to those that are using the equipment whose configuration conditions are to be changed. The present invention relates to a method of changing station data of a processor in a multiprocessor system. 2. Description of the Related Art In a multiprocessor system in which each processor has station data on each main memory, change of station data while executing system processing is performed by sequentially rewriting station data of each processor. . But,
If a specific processor fails during replacement and the replacement process of the processor is stopped and initialized, only the processor will have the station data before the change without being rewritten. There is a problem that inconsistency occurs and normal system processing cannot be performed. Therefore, conventionally, when a failure or the like occurs during the change of the station data, all the processors are initialized, all the processes are stopped, and the processing is invalidated. Therefore, even in the case of a failure of only one processor, the system processing of all processors is stopped, and the service quality is reduced. In addition, since the interruption time increases in proportion to the number of processors, there is a problem that as the number of processors increases, the service quality deteriorates. This will be described with a specific example. FIG. 6 shows a multiprocessor system in which each processor has station data on each main memory. This system represents a switching system for the purpose of system processing for transferring data received from a terminal to another terminal or another system. FIG. 7 shows the change of the station data at the time when the communication line is added. FIG. 8 and FIG. 9 each show a processor failure when the station data is changed. In these figures, P0, P1, P2, and P3 are processors and are interconnected by a bus. MM is the main memory of each processor, TYP0 and TYP1 are terminals connected to this system, LN0 and LN1 are communication lines connecting this system and other systems, and LN1 is a communication line to be added. Is shown. The TYP management station data and the LN management station data are station data indicating the accommodation processor position of each TYP and LN. All processors have these station data in main memory MM,
System processing such as data transfer is performed by referring to these data. The shaded portions in FIGS. 8 and 9 indicate a processor in which a failure has occurred and a processor whose service is to be suspended or initialized accordingly. In the system of FIG. 6, a communication line is connected to the processor P0.
Consider adding LN1. In this case, as shown in FIG. 7, at the time of expansion, the LN management station data in the main memory MM on each processor is sequentially rewritten. LN in Fig. 7
The management station data LN1 indicates station data to be rewritten. [Problems to be Solved by the Invention] If a processor failure occurs at P0 during the change of the station data, only the processor P0 is initialized as shown in FIG. 8 and rewritten by the file memory station data. Since the data, that is, the data indicating the system configuration conditions before the change, is included, the station data is inconsistent between the processors. As a specific processing example, consider the case where the P2 processor receives data to be transferred to another system from the TYP1 terminal. If the processor P2 attempts to communicate with another system via the communication line LN1 of the processor P0, a contradiction occurs. That is, the processor P2 passes the data to P0 via the bus, but the processor P2 refers to the station data and determines that there is no communication line in its own processor. In order to avoid this, conventionally, when a processor failure occurs during the change of station data, the system processing of all processors is stopped as shown in FIG. Become For this reason,
In the meantime, the service is interrupted, so that the service quality deteriorates. In addition, since the interruption time increases in proportion to the number of processors, there is a problem that as the number of processors increases, the service quality deteriorates. SUMMARY OF THE INVENTION An object of the present invention is to provide a multiprocessor system in which each processor has station data on its main memory, if a fault occurs during the change of station data, the system processing is stopped. It is an object of the present invention to provide a method for changing the station data of a processor in a multiprocessor system that can limit the change target equipment to only those in use and can suppress the deterioration of the service quality. [Means for Solving the Problems] In order to achieve the above object, according to the present invention, a failure occurs in the station data changed or changing processor while the station data individually held by a plurality of processors is sequentially changed for each processor. In this case, the processor stops the processing, loads the station data before the change in the file memory into the main memory, thereby returning the station data to the state before the change, performs the initial setting, and the processors other than the processor perform system initialization. Without interrupting the processing, load the pre-change station data in the file memory into the main memory and return the station data to the state before the change, but do not perform the initial setting, and confirm that the system processing of all processors is inconsistent with the station data. The processing is stopped only when it is found. [Operation] The present invention, in a multiprocessor system in which each processor has station data on each main memory, when changing the station data, when changing the station data of some processors due to a processor failure or the like, By returning the station data of all the processors to the state before updating without suspending the system processing in the other processors, a state in which there is no inconsistency between the processors is achieved. This provides an environment in which subsequent system processing can operate without contradiction. Returning station data without suspending system processing in other processors can cause inconsistencies in system processing that spans between processors or in interrupted system processing. Considering a certain case, the process is stopped when inconsistency is detected. As described above, the range of suspension of the system processing due to a failure or the like is limited to only those in which the configuration condition change target facility is in use, thereby preventing a decrease in service quality. Embodiment FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIG.
FIG. 5 to FIG. 5 are explanatory diagrams specifically showing a method of realizing the embodiment shown in FIG. In these figures, P0, P1, P2, P3, and PM are processors, respectively, and are mutually connected by a bus. MM
Is a main memory of each processor, FM is a file memory, TYP0, TYP1 are terminals connected to this system, LN0, LN1 are communication lines connecting this system to other systems, and LN1 is Indicates the communication line to be added. The TYP management station data and the LN management station data are station data indicating the accommodation processor position of each TYP and LN. All processors have these station data on the MM, and perform system processing such as data transfer by referring to these data. The shaded portion in the figure indicates a processor in which a failure has occurred, and a processor whose service is to be suspended or initialized accordingly. In the method of the present invention, as shown in FIG. 1, the system processing executed by the failed processor is stopped to initialize only the processor, and the other processors are not stopped without stopping the system processing. However, if only the station data was returned before the change, and there was a system process that caused an inconsistency because the expanded communication line LN1 was used when returning the station data, just stop it and other system processes Continued. For this reason, the range of irrespective of the number of processors can be limited, and the quality of service does not deteriorate much. The implementation method of the embodiment of FIG.
This is shown using the figure. 2 to 5 differ from each other in the file memory position, the failure detection position, and the like. Please refer to FIG. This is a case where each processor has its own file memory and a failure detection mechanism. When a processor failure is detected, the processor P0 that has detected the failure stops the system processing being executed, loads the station data on the subordinate file memory FM to the main memory MM, returns the station data to before the change, Is initialized. Then, the other processors P1 to P3 are notified of the occurrence of the failure. Non-failed processors P1 to P3 that have been notified of the failure
Loads the station data on the file memory FM under the control of each processor into the main memory MM and returns the station data to the state before the change, but does not perform initialization. When all the processors find inconsistency in the station data, only the processing is stopped. Please refer to FIG. In this case, each processor has a file memory of its own processor and a failure detection mechanism of all processors. When a processor failure is detected, the detected processor P0 stops the system processing being executed,
The station data on the file memory FM under the main memory MM
And initialize it. Non-faulty processor P1 ~
P3 loads the station data in the file memory FM under the control of each processor into the main memory MM and returns the station data to the state before the change. When all the processors find inconsistency in the station data, only the processing is stopped. Please refer to FIG. In this case, only the processor PM has the file memories of all the processors and the failure detection mechanism. At the time of detecting the failure of the processor P0, the processor PM stops the system processing being executed by the processor P0 and transfers the station data for the processor on the file memory FM under the PM to the main memory MM of the processor P0. ,initialize. The non-failed processors P1 to P3 have file memories under the PM
The station data for each processor on the FM is transferred to the main memory MM of each processor, and the station data of all processors is returned to before the change. When all the processors find inconsistency in the station data, only the processing is stopped. Please refer to FIG. In this case, the processor PM has the file memories FM of all the processors, and each processor has a failure detection mechanism. When the failure of the processor P0 is detected, the processor P0 stops the system processing being executed, and issues a transfer request of the processor station data on the file memory FM under the PM to the processor PM. When receiving the transfer request, the processor PM transfers the station data to the processor P0.
The processor P0 transfers the station data to the main memory MM for initialization, and notifies other processors P1 to P3 of the occurrence of a fault. Non-failed processors P1 to P2
P3 issues a request to the processor PM to transfer the station data for the processor on the file memory FM under the PM. Processor PM
Receives the transfer request and transfers the station data to the processors P1 to P3. The processors P1 to P3 transfer the station data to the main memory MM, and return the station data of all the processors before the change. When all the processors find inconsistency in the station data, only the processing is stopped. [Effects of the Invention] As is apparent from the above description, according to the present invention, in a multiprocessor system in which each processor has station data on each main memory, when a failure occurs while changing station data, Except for the initialization of the failed processor, the station data of all processors is returned to the state before updating without initializing other processors, so that there is no inconsistency between processors. By adopting the two logics of stopping the processing when the inconsistency of the station data is found, the range of the failure where the system processing is stopped irrespective of the number of processors is limited, and the deterioration of the service quality is suppressed. There is an advantage that a method of changing station data of a processor in a multiprocessor system that enables a configuration condition changing method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIGS.
6 is an explanatory diagram specifically showing a method of realizing the embodiment shown in FIG. 1, FIG. 6 is an explanatory diagram showing a configuration example of a multiprocessor system, and FIGS. 7 to 9 are diagrams of a conventional processor system. FIG. 4 is an explanatory diagram of an operation mode related to the present invention. Description of the symbols P0, P1, P2, P3, PM: Processor, MM: Main memory,
FM …… File memory, TYP0, TYP1 …… Terminal, LN0, LN1…
… Communication line, LN1 …… Expansion communication line,

Claims (1)

(57) [Claims] Each processor has data (hereinafter, referred to as station data) indicating system configuration conditions necessary for executing a target process of the system (hereinafter, referred to as system processing) on each main memory, and also has, on a file memory, In a multiprocessor system that has station data at the time of initial setting of the processor and autonomously loads the station data in this file memory into the main memory and initializes the processor in the event of a processor failure, the station data individually owned by multiple processors is stored for each processor. If a failure occurs in the processor whose station data has been changed or is being changed while sequentially changing the station data, the processor stops processing and loads the station data before the change in the file memory into the main memory, thereby changing the station data. To the values before the change, make the initial settings, and process Is to load the pre-change station data on the file memory into the main memory and return the station data to the state before the change without interrupting the system processing so that the initial setting is not performed, and each of the plurality of processors constituting the system If inconsistencies occur between the station data, only the system processing that caused the inconsistency is stopped, and other system processing is continued. A method of changing station data of a processor in a multiprocessor system.