Multi-phase file system restore with selective on-demand data availability
US8204863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2009 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Aug 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1469
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A selective restore technique for restoring file systems within computer systems provides on-demand access during the restore process, while preventing users from slowing the restore process by generating random accesses to files that have not yet been restored, early in the restore process. The restored files are grouped into multiple groups of files, which correspond to multiple phases of the restore process. On-demand requests may be locked out for some or all users during the first one or more phases of the restore, while they are permitted for the subsequent phases, ensuring that critical files needed by all users will be available before the backup process is interrupted by on-demand accesses. The groups are generally organized by elapsed time since last access or modification, and may be organized at restore time or during periodic back-up operations so that the files may be similarly organized in the backup media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.