Method and apparatus for migrating volumes and virtual disks
US7085883B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2002 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Jul 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/631
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for migrating a volume and a virtual disk from a first storage controller to a second storage controller in a distributed storage system having volumes and virtual disks associated with storage controllers. In one embodiment, the virtual disk is migrated to the second storage controller, and requests for data reads/writes associated with the virtual disk are routed to the second controller. Further, in another embodiment, the volume is migrated to the second storage controller, and requests for data reads/writes associated with the volume are routed to the second controller. A contact address may be associated with a plurality of storage controllers and once a session between an application server and a volume is established, the application server may be redirected so as to communicate with the storage controller associated with the volume using the IP address of the storage controller. In this manner, the volumes and the virtual disks may be migrated, independently if desired, to other storage controllers in the network without disrupting the data flow between the application server and the storage controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.