Managing backup copies in cascaded data volumes
US10083087B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Jul 14, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1464
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Point-in-time backup copies of a production volume that include volume maps between adjacent source and target volumes can be created in a cascade of data volumes. An empty volume map having the backup copy as the target can be created. The empty volume map can include a first bitmap used to indicate that data is stored in the source or the target, a second bitmap for use in managing and optimizing background copying, and an index for tracking a status of background copying. The volume map can be populated so that they first bitmap indicates data is stored in the source, and the index set to a start value. Production volume data regions can be sequentially background copied to the backup copy, while tracking using the index. Upon backup copy completion, the values of the volume map having the backup copy as the target can be stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.