Storage system providing heterogeneous virtual volumes and storage area re-allocation
US8489844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2009 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jun 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
If an I/O load on a first virtual storage area falls below a first threshold, a controller copies data in a first storage area, which is allocated to the first virtual storage area, to a third storage area in a second tier storage area, and allocates the third storage area instead of the first storage area to the first virtual storage area. If an I/O load on a second virtual storage area exceeds a second threshold which is greater than said first threshold, the controller copies data in a second storage area, which is allocated to the second virtual storage area, to a fourth storage area in a first tier storage area, and allocates the fourth storage area instead of the second storage area to the second virtual storage area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.