| 摘要 |
A computer is coupled to a storage apparatus, which comprises a hierarchical pool comprising multiple storage tiers that are multiple page groups having different IO performance, and which, in a case where a migration request has been received, migrates page data, which is data in units of pages, between storage tiers in accordance with the migration request. The computer comprises a storage device and a control device, which is coupled to the storage device. The storage device stores performance requirement management information comprising information denoting a performance requirement of a task, which is an execution unit of a prescribed process, and IO performance information enabling identification of a difference in IO performance between the multiple storage tiers. The control device calculates, based on the IO performance information, an amount of change predicted in the task execution performance on supposition that one or more data objects for use in the task are to be migrated to a page in another storage tier, and identifies, based on the predicted amount of change, one or more data objects capable of being migrated to a page in another storage tier while ensuring a state in which execution performance with respect to the task meets the performance requirement. |
