Storage apparatus and area releasing method
AssigneeFujitsu Limited
InventorJun MAEDA
Life of this patent
Estimating the term…
Abstract
A storage apparatus performs, in place of a copy process which involves physical resource allocation to a copy destination logical volume, a copy process which allows the copy destination logical volume to refer to an allocation destination managed by a management unit area of a copy source logical volume. A storage unit stores management information relating to the reference destination of the management unit area of the logical volume. A control unit releases the physical resource which has been allocated to the management unit area by exchanging the reference destination of the management unit area specified by a release command from a host computer with the reference destination of the management unit area of the other logical volume corresponding to the specified management unit area.
Claims9
A storage apparatus comprising:
- a memory configured to store management information relating to a reference destination of a management unit area that a logical volume includes;
- and
- one or more processors configured to perform a procedure including:
- when data copy is performed from a copy source logical volume to a copy destination logical volume by allowing the copy destination logical volume to refer to a physical resource allocated to the management unit area of the copy source logical volume,
- accepting a release command to release allocation of the physical resource of the management unit area that the copy source logical volume includes, and
- updating the management information in a manner that exchanges the reference destination of the management unit area that the copy source logical volume includes with the reference destination of the management unit area that the copy destination logical volume includes.
A computer-readable storage medium storing an area releasing program, the program causing a computer to perform a procedure comprising:
- when data copy is performed from a copy source logical volume to a copy destination logical volume by allowing the copy destination logical volume to refer to a physical resource allocated to the management unit area of the copy source logical volume,
- accepting a release command to release allocation of the physical resource of the management unit area that the copy source logical volume includes, and
- exchanging the reference destination of the management unit area that the copy source logical volume includes with the reference destination of the management unit area that the copy destination logical volume includes.
An area releasing method comprising:
- accepting, by a computer, when data copy is performed from a copy source logical volume to a copy destination logical volume by allowing the copy destination logical volume to refer to a physical resource allocated to a management unit area of the copy source logical volume, a release command to release allocation of the physical resource of the management unit area that the copy source logical volume includes, and
- exchanging, by the computer, the reference destination of the management unit area that the copy source logical volume includes with the reference destination of the management unit area that the copy destination logical volume includes.
Dependencies are inferred from the claim text.