System, method and computer program product for generating a consistent point in time copy of data
US7650476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/82
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for generating a consistent point in time copy of data, the method includes: selecting at least one selected data block to be copied from a source volume to a target volume in response to a request to generate a consistent point in time copy of multiple data blocks; waiting until the source volume is ready to send the at least one selected data block to a remote volume while queuing at least one data block modify request; de-queuing the at least one queued modify requests while copying the at least one selected data block from the source volume to the target volume; wherein the copying includes utilizing a first copying mechanism to copy a first selected data block if a request to modify the first selected block is de-queued before the first selected data block is copied to the target volume; else, the copying includes using a second copying mechanism that is slower than the first copying mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.