System, method and computer program product for generating a consistent point in time copy of data
US8095755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2009 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Mar 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/82
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Generating a consistent point in time copy of data in a source volume and a target volume is achieved responsively to a first data modification request by writing a first altered version of the data onto a single source volume, asynchronously transferring the first altered version from the first storage site to a target volume located at a remote second storage site, while avoiding copying the first altered version onto other volumes at the first storage site. While asynchronously transferring the first altered version de-queuing a second modification request, and responsively to the second modification request synchronously transferring the first altered version from the first storage site to the target volume. Then a second altered version of the data is written to the single source volume and a copy transferred to the target volume in like manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.