Methods and systems for managing I/O requests to minimize disruption required for data migration
US7809912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2006 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Feb 10, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/067
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems are provided for minimizing disruptions when host data on a source logical unit is migrated onto a target logical unit. I/O requests are managed in a particular order during various states of the migration. After the target logical unit is synchronized with the source logical unit and before a commitment to the target logical unit is made, the target logical unit can be evaluated. At that point, the migration can be aborted. During the evaluation of the target logical unit, I/O requests that were directed to the source logical unit are redirected to the target logical unit and I/O requests that were directed to the target logical unit are redirected to the source logical unit. The disclosed methods and systems are equally effective at enabling less disruptive virtualization of a source logical unit as a target logical unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.