| 摘要 |
A management computer connected to a storage device that has a plurality of types of media having different performance levels and that provides, to a computer, a volume in which regions of at least one of the media have been allocated to said computer, with said management computer allocating the volume to the computer, wherein said management computer: manages a hierarchy that is formed by the plurality of types of media such that higher performance media are assigned to higher tiers of the hierarchy; allocates at least one tier of the hierarchy to the volume in accordance with a required performance preset for the computer; calculates an allocation modification scheme for the volume by assuming that the uppermost tier of the hierarchy has been removed; and calculates a predicted value of the performance of the volume assuming that the allocation modification scheme has been applied. |
