Tracking data of virtual disk snapshots using tree data structures
US10860560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Oct 8, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/128
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
User data of different snapshots for the same virtual disk are stored in the same storage object. Similarly, metadata of different snapshots for the same virtual disk are stored in the same storage object, and log data of different snapshots for the same virtual disk are stored in the same storage object. As a result, the number of different storage objects that are managed for snapshots do not increase proportionally with the number of snapshots taken. In addition, any one of the multitude of persistent storage back-ends can be selected as the storage back-end for the storage objects according to user preference, system requirement, snapshot policy, or any other criteria. Another advantage is that the storage location of the read data can be obtained with a single read of the metadata storage object, instead of traversing metadata files of multiple snapshots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.