Lossless data restore using multiple levels of lightweight snapshots
US11442647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2018 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Nov 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/82
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems for high performance restore of data to storage devices. A method embodiment commences upon identifying a plurality of virtual disks to be grouped together into one or more consistency sets. Storage I/O commands for the plurality of virtual disks of the consistency sets are captured into multiple levels of backup data. On a time schedule, multiple levels of backup data for the virtual disks are cascaded by processing data from one or more higher granularity levels of backup data to one or more lower granularity levels of backup data. A restore operation can access the multiple levels of backup data to construct a restore set that is consistent to a designated point in time or to a designated state. Multiple staging areas can be maintained using lightweight snapshot data structures that each comprise a series of captured I/Os to be replayed over other datasets to generate a restore set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.