Change tracking of individual virtual disk files
US8326803B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2010 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jan 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A first write operation is intercepted. The first write operation is a write from a virtual machine to a virtual disk. The first write operation is a change to a first data location. The change to the first data location is recorded. The recording creates a first change record. The first change record is stored separately from the first data location. A first backup operation is performed. The first backup operation, the intercepting, and the recording are performed by an application executing on a host of the virtual machine. The first backup operation includes a read request for the first data location. The read request for the first data location is fulfilled based on the first change record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.