Method and apparatus for I/O priority control in storage systems
US8032730B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2008 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Apr 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/645
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In exemplary embodiments a storage control unit is able to provide and track priority control among virtual ports created for corresponding physical ports and/or volume groups made up of one or more volumes, and thereby ensure application of priority settings. According to exemplary embodiments, when a virtual port created for a physical port on a first storage control unit is transferred to another physical port, such as in the same storage control unit or on another storage control unit, priority settings on the first physical port and storage control unit are checked and transferred with the virtual port to the other physical port to prevent competition for priority by virtual ports at the destination physical port. Similarly, priority settings assigned to volume groups may also be transferred when a volume group is transferred to another physical port within a storage control unit or to a different storage control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.