Data recovery point review in a continuous data protection system
US9495370B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2008 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | May 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/645
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technologies for providing recovery point review within a continuous data protection system can support a data storage operator in a data recovery procedure. A snapshot image can be chosen that was made prior to a data loss event. A new writable snapshot can be created from this logged snapshot. The new writeable snapshot can become the target for recovering the data volume. Review can be performed in a forward direction by reading a journal of I/O operations that have occurred since the prior snapshot was made. Review can be performed in a backward direction by deriving a dirty data list of changes made to the data volume and then removing the changes as requested. The operator can continue forward and backward review operations to refine the selected recovery point. Upon establishing the desired recovery point, the new writable snapshot can be committed, or rolled back, onto the data storage volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.