Computing system having a controller for controlling allocation of a storage area of a logical volume in a pool to a virtual volume and controlling methods for the same
US8516215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Dec 25, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The computer system includes a storage device, a virtual volume, a plurality of logical volumes each including a storage area and constituting a pool, and a controller for controlling the allocation of the storage area from the logical volumes in the pool to the virtual volume. The controller is configured to: manage, for each of the plurality of logical volumes in the pool, a capacity of the logical volume and a number of units of storage areas allocated to the virtual volume; allocate one or more units of storage area not allocated to virtual volume from the plurality of logical volumes in the pool to the virtual volume when it is necessary; detect a state where an imbalance occurs between the numbers of units of allocated storage areas of the logical volumes in the pool based on the managed information; and change the allocation in order to achieve a balance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.