| 摘要 |
PROBLEM TO BE SOLVED: To perform file update of an execution program or the like providing service in a short time, and to rapidly perform a rollback when the rollback is required in time of the file update. SOLUTION: An old file and a new file are executed in parallel in an SBY system while an ACT system provides the service in the old file. Type conversion processing to a new memory area is performed before a system changeover in parallel with data synchronization between old memory areas performed by event driven with data transition in a synchronization target memory area of the ACT system. Thereby, it eliminates the need for the type conversion processing in resumption processing after the system changeover, so that a service start in the new file can be rapidly performed. The new file distinctively allocates the old memory area and the new memory area, and the old memory area is made to be stored even if the type conversion processing to the new memory area is performed. Thereby, a memory is relieved in its own system in time of resumption failure, and the rollback to the old file becomes possible. COPYRIGHT: (C)2008,JPO&INPIT
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