Copy method supplementing outboard data copy with previously instituted copy-on-write logical snapshot to create duplicate consistent with source data as of designated time
US7072915B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | May 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99955
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A copy method is disclosed to provide a duplicate copy of source data where the duplicate copy is consistent with the source data as of a designated time. The method includes creating a copy-on-write relationship between specified source data and an original image cache, utilizing an application outboard of the designated host application to copy all items of source data and their associated locations to a secondary data object without regard to whether the items source data have been updated since creating the copy-on-write relationship, and copying a specified amount of contents of the original image cache to the secondary data object. The specified amount includes contents of the original image cache as of completion of the utilizing operation. In addition, the method includes permitting copy-on-write relationship to continue during the utilizing operation and during at least part of the copying operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.