Synchronization of physical disks
US10162873B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Apr 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/273
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a process for migrating a virtual machine's storage from a source disk to a destination disk, during a steady state (i.e., wherein the contents of the virtual machine stored on the source disk and the destination disk are equal), a virtual machine monitor receives a set of write requests from a guest operating system (“guest”) of the virtual machine, provides confirmation of the completion of the set of writes to the source disk, and asynchronously replicates the set of write requests to the destination disk. Upon receipt of a flush request from the guest, the virtual machine monitor confirms completion of the flushing of the destination disk following replication of the write requests to the destination disk. Upon receipt of a switch request from a virtual machine manager, the virtual machine monitor switches the virtual machine to the destination disk and issues subsequent write requests to the destination disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.