| 摘要 |
PROBLEM TO BE SOLVED: To allow capacities of intermediate storage areas of hierarchical intermediate storage functions to be dynamically determined so as to improve performance in accordance with access characteristics while suppressing the increase of resources and the increase of overhead.SOLUTION: A storage device 2 includes: a storage medium 2-1; a higher intermediate storage function 2-2 including a plurality of intermediate storage areas; a lower intermediate storage function 2-3 including a plurality of intermediate storage areas; an intermediate storage access information collection unit 2-4 which collects hit information resulting from increase and/or decrease in capacity of intermediate storage areas of the higher intermediate storage function, on the basis of hit information in the intermediate storage areas of the higher intermediate storage function and the lower intermediate storage function with respect to an access request; and an intermediate storage area capacity determination unit 2-5 which determines capacities of intermediate storage areas of the higher intermediate storage function 2-2 and the lower intermediate storage function 2-3 on the basis of hit information collected by the intermediate storage access information collection unit 2-4. |
