| 摘要 |
A storage management method and the like for managing a hierarchical storage are provided. A storage management method is provided for managing a hierarchical storage including a lower storage tier, and a higher storage tier having higher speed than the lower storage tier, on a computer system including at least one computer. This storage management method includes a step of causing the computer system to copy a target data item from the higher storage tier to the lower storage tier, and a step of causing the system to determine whether or not to delete the entity of the data item on the higher storage tier having been subjected to the copying based on a time required for reading the copy of the data item. |
