Handling link failures in remote mirroring applications using snapshots
US7155635B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Oct 1, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for resynchronizing a primary volume in a primary system and a secondary volume in a secondary system over a network includes, when a network connection between the primary system and the secondary system is interrupted, creating a snapshot of the primary volume and determining data updates transmitted from the primary system to the secondary system that were not acknowledged by the secondary system. The method further comprises, when the network connection is reestablished, determining differences between the snapshot and the primary volume, transmitting the differences and the unacknowledged data updates from the primary system to the secondary system, and updating the secondary volume with the differences and the unacknowledged data, wherein the secondary volume becomes an updated copy of the primary volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.