Stream level uninterrupted restore operation using an interrupt service routine approach
US10942820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2019 |
| Grant date | Mar 9, 2021 |
| Priority date | — |
| Expiry date | Sep 9, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments are described for performing an uninterrupted restore in a storage system in view of one or more abort events. A restore agent receives writes one or more data blocks to a conditional construction container. A parent interrupt service routine (ISR) polls for abort events. In response to an abort event, an intermediate interrupt is generated that spawns a child processes for each process of the restore. The intermediate ISR logs each child ISR, the process it is responsible for, and the intermediate interrupt, for later restoration of the restore state. After a recovery of the above event, then each child ISR can be called to restore its state. After restoring the state, the restore agent resumes the restore from where the abort event was detected. The child ISRs are re-entrant. If another abort event is detected, the restore state can again be saved and later resumed from that state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.