Provided are an area management table, an operation management policy, and a resource broker. In the area management table, one or more physical area IDs for identifying one or more storage area candidates selected from a plurality of physical storage areas, are associated with each application program. The operation management policy states a guideline for storage area assignments based on operational status of each server provided with the application programs. The resource broker detects the operational status of each server, and based on the detected operational statuses and the operation management policy, determines physical storage areas to assign to each application program.

 
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