| 摘要 |
PROBLEM TO BE SOLVED: To control the execution of fail-over in accordance with a processing state of a program. SOLUTION: A server computer 102 constituting a cluster system 101 is provided with a service providing part 112 for providing a service to client computers 104 to 106, a cluster processing part 111 for executing fail-over when detecting operation stop of other server computer 102 or when receiving an instruction to execute fail-over, and a service providing part state monitoring part 121 for monitoring a processing state of the service providing part 112. The service providing part state monitoring part 121 periodically determines whether a processing time of the service providing part 112 exceeds a predetermined critical processing time, and instructs the cluster processing part 111 to execute fail-over when it is determined that the processing time exceeds the predetermined critical processing time. COPYRIGHT: (C)2009,JPO&INPIT
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