| 摘要 |
PROBLEM TO BE SOLVED: To retrieve another physical resource of the same sort taking a substitutive role even when a certain physical resource cannot be used with some cause, and to enable a user (application) to continue execution of an application without being conscious of replacement of the physical resource.SOLUTION: Coordinators on a network are divided into upper coordinators and lower coordinators, and in the upper coordinators, only a common pointer to physical resources of the same sort is managed by a virtual resource management DB. In the lower coordinators, sorts of physical resources are managed as information of the physical resources, and when a certain physical resource is deviated from a lower coordinator management range or cannot be used due to failure, the physical resource is changed to another physical resource of the same sort and an application is executed. |
