File-level continuous data protection with access to previous versions
US8005797B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2009 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for continuous data protection includes a storage device and a backup storage device. The continuous data protection procedure is performed as two parallel processes: creating an initial backup by copying a data as a file/directory from the storage device into the backup storage device, and copying the data to be written to the data storage as a part of a file/directory into the incremental backup. When a write command is directed to a file system driver, it is intercepted and redirected to the backup storage, and the data to be written in accordance with the write request, is written to the incremental backup on the backup storage. If the write command is also directed to a data (a file/directory) that has been identified for backup, but has not yet been backed up, the identified data (a file/directory) is copied from the storage device to the intermediate storage device. Then, the write command is executed on the identified file/directory on the storage device and the file/directory is copied from the intermediate storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.