| 主权项 |
1. A method, comprising:
pinning, by a first application, a storage unit including a sub-unit of the storage unit, to a selected storage tier of a plurality of storage tiers; in response to expiry of a predetermined duration of time, releasing, by the first application, the pinning of the sub-unit to the selected storage tier, to make the sub-unit eligible for movement to other storage tiers of the plurality of storage tiers; and in response to the releasing by the first application of the pinning of the sub-unit to the selected storage tier, taking control, by a second application, of management of the sub-unit, wherein the second application moves the sub-unit to an appropriate storage tier of the plurality of storage tiers or continues to maintain the sub-unit in the selected tier. |
