BUFFER CACHE MANAGEMENT DEVICE, BUFFER CACHE MANAGEMENT METHOD, AND BUFFER CACHE MANAGEMENT PROGRAM

摘要

PROBLEM TO BE SOLVED: To avoid the deterioration of access performance to data when a plurality of applications refer to data stored in a storage device with a large capacity via a buffer cache.SOLUTION: A buffer cache management device 50 includes: a priority order management information generation part 51 for, when a plurality of applications reference the block data of data stored in a first storage part 80 via a second storage part 70, determining a priority order for leaving the block data in the second storage part 70 for each application, and for generating priority order management information 510 in which the priority order and the identifier of the application and the identifier of the block data are associated with each other; and a copy deletion part 52 for, when any application makes an access request, referring to the priority order management information 510, and for deleting the block data in which a value indicated by the priority order satisfies predetermined conditions among the block data already copied to the second storage part 70 from the second storage part 70.