| 摘要 |
PROBLEM TO BE SOLVED: To improve a cache hit rate in a cache device for reading and caching contents from a large scaled database. SOLUTION: A cache device 30 is provided with a cache part 300 for recording the set of attribute ID, an extractor for extracting the attribute ID from object ID and attribute data to be identified from the attribute ID. Then, the cache device 30 receives the object ID, and extracts the attribute ID from the object ID by the extractor recorded in the cache part 300, and when the extracted attribute ID is coincident with the attribute ID cached while being made to correspond to the extractor, the cache device 30 returns the attribute data recorded while being made to correspond to the extractor. When the extracted attribute ID is not matched with the attribute ID recorded while being made to correspond to the extractor, the attribute data and the extractor are received from a DB 20 according to the object ID, and the cache part 300 is made to cache the read extractor and attribute data while being made to correspond to the attribute ID. COPYRIGHT: (C)2007,JPO&INPIT
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