Multiple incremental virtual copies
US8429363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2012 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | May 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1451
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided are techniques for, in response to establishing each incremental virtual copy from a source to a target, creating a target change recording structure for the target. While performing destage to a source data block at the source, it is determined that there is at least one incremental virtual copy target for this source data block. For each incremental virtual copy relationship where the source data block is newer than the incremental virtual copy relationship and an indicator is set in a target inheritance structure on the target for a corresponding target data block, the source data block is copied to each corresponding target data block, and an indicator is set in each target change recording structure on each target for the target data block corresponding to the source data block being destaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.