Migrating snapshot data according to calculated de-duplication efficiency
US8700871B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2010 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Jan 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/067
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage resource is effectively utilized in migration of a snapshot. First de-duplication efficiency which is de-duplication efficiency of snapshot data, and second de-duplication efficiency which is de-duplication efficiency of snapshot entities created on the basis of the snapshot data are calculated and compared with each other. Based on a result of the comparison as well as a first preservation period set for the snapshot in the migration source and a second preservation period set for the snapshot in the migration destination, one of the following methods is selected: a first method of migrating an snapshot image, a second method of migrating snapshot data to an archive storage system, and a third method of migrating data materialized from a first differential volume, a second differential volume, and a switch snapshot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.