Achieving data consistency with point-in-time copy operations in a parallel I/O environment
US7930477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2008 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | May 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2097
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for processing a point-in-time copy of data associated with a logical storage volume where the data to be copied is stored in a striped or parallelized fashion across more than one physical source volume. The method includes receiving a point-in-time copy command concerning a logical volume and distributing the point-in-time copy command in-band to each of the physical source volumes containing a portion of the striped data. The method also includes establishing a point-in-time copy relationship between each physical source volume and one of a corresponding set of multiple physical target volumes. The method further includes copying the data stored on each physical source volume to the corresponding physical target volume. The in-band copy command and the striped data may be distributed over I/O channels between a server and the physical storage and processed sequentially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.