| 摘要 |
PROBLEM TO BE SOLVED: To perform switching of a system when a failure occurs in a redundant system in a short period of time. SOLUTION: A main system server 10 and a standby system server 20 are provided with execution period DB11 and 21 with periods to execute jobs stored therein and execution orders DB 13 and 23 with the execution orders of jobs which have dependence with each other stored therein. The standby server 20 is provided with an unexecuted job DB22 with jobs which have not been executed by the main system server 10 stored therein. In a normal time, the main system server 10 executes the jobs by referring to the execution period DB11 and the execution order DB13, and notifies the standby system server 20 of executed jobs, and the standby system server 20 updates the unexecuted job DB22 on the basis of the notification. In an abnormal time, the standby system server 20 refers to the execution period DB21, the execution order DB23 and the unexecuted job DB22, and executes the jobs which have not been executed by the main system server 10, that is, the jobs having dependence with jobs have been already executed. COPYRIGHT: (C)2009,JPO&INPIT
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