| 摘要 |
A condition storage unit (40) retains generation conditions including requested freshness of resource information serving as a collection target and a polling time interval. A collection schedule generating unit (10) sorts the pieces of resource information, which has the same value as an update interval derived from the requested freshness, into a same group, generates collection schedules for the groups respectively, the collection schedules are of the resource information belonging to the groups, and stores them in a collection schedule storage unit (50). An information collecting unit (20) collects the pieces of resource information in accordance with the generated collection schedules and stores the information in an information storage unit (60).
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