Accessing point in time versions of a logical device in connection with I/O operations
US9927980B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2016 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and techniques are provided for incremental Continuous Data Protection (iCDP) as a process to secure frequent, and space efficient, versions of consistent point-in-time images of a group of volumes using snapshot technology. The system provides for automation to create and manage frequent snapshots of defined groups of volumes. The incremental approach of the system described herein provides a convenient way to roll back to prior point-in-time versions to investigate data damage due to processing errors or other forms of corruption. Log space in log devices may be reclaimed in connection with managing recovery and roll back capabilities of the system to desired data versions for purposes of data protection. Point in time versions of a source device may be accessed through the source device. The particular point in time version accessed in servicing an I/O may be determined in accordance with one or more criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.