File updating method for redundant system
A file update, redundant system technology, applied in the redundant operation in the direction of data error detection, response error generation, special data processing applications, etc., can solve the problems of unrecoverable, time-consuming, etc. Effect
Active Publication Date: 2007-10-03
OKI ELECTRIC IND CO LTD
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Therefore, there is a problem that after starting the format conversion process, when the restart process fails and the old file is restored (roll back), the SBY system cannot restore, and the system switching process to another system (old ACT system) is performed, It takes time until the service restoration of the old file is completed
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[0039] Next, an embodiment of the file update method of the redundant system of the present invention will be described with reference to the drawings.
[0040] The basic concept of this embodiment is as follows. During the period that the ACT system provides services through the old file, the old file and the new file are executed in parallel in the SBY system. In addition, prior to the system switching, format conversion processing to the new storage area is performed in parallel with data synchronization between the old storage areas by event driving triggered by data migration in the synchronization target storage area of the ACT system. As a result, in the restart process after the system switching, the service of the new file can be quickly started without performing the format conversion process. Also, the new file is allocated by distinguishing the old storage area from the new storage area, and the old storage area remains even if the format conversion process to t...
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The invention provides a file updating method of a redundancy system, capable of performing updating on files such as execution programs and the like which are providing services. During file updating, the files can be rapidly resumed when need to be resumed. During a time that an ACT system provides services by old files, the old files and new files are executed in parallel. And a system performs a format conversion processing to a new storage region in parrallel with data synchronization between old storage region performed by event driving at a moment of transfering data in a synchronous object storage region of the ACT system, before the system is switched. In this way, the format conversion processing need not to be performed in a re-generation processing after the system is switched, service using the new files can be rapidly started. Morever, the new files are distributed in a way of distinguishing the old storage regions and new storage regions, the old storage regions are reserved even if format conversion processing is performed to the new storage regions. Thereby, when re-generation is failed, a momory can be saved in a self-system, and the old files are resumed.
Description
technical field [0001] The present invention relates to a method for updating files in a redundant system, and in particular, in a system that requires high reliability, such as a call server, to update files of an execution program that is providing the service while continuing to provide the service. The file update method to use when updating. Background technique [0002] Generally, in order to maintain the reliability of a system requiring high reliability, such as a call server, as shown in Fig. 2, a dual redundant system including an ACT system (operating system) server A001 and an SBY system (standby system) server S001 is adopted . [0003] Each server A001, S001 includes hardware A006, S006 having an interface unit (network interface card: NIC) A007, S007 connected to another system, a hard disk A008, S008, etc., and a general-purpose OS for cooperating with software described later. . In FIG. 2 , only the cores A005 and S005 are described for the general-purpos...
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IPC IPC(8): G06F11/14G06F9/46G06F17/30
CPCG06F11/2038G06F11/1441G06F11/2048
Inventor 山崎雄介小池友岳
Owner OKI ELECTRIC IND CO LTD