Deterministic recovery of a file system built on a thinly provisioned logical volume having redundant metadata
US8037345B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2010 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Apr 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/183
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A file server architecture decouples logical storage from physical storage and provides proactive detection and containment of faults, errors, and corruptions in a file system, in order to enable in place (online) and non-intrusive recovery. The file system is built upon a thinly provisioned logical volume, and there are stored three copies of the metadata defining the logical volume in order to provide quick, deterministic, and reliable recovery from a faulted system. A first copy of the metadata is distributed among all of the slices of physical storage allocated to the logical volume. A second copy of the metadata is stored in a root slice of the logical volume. A third copy of the metadata is stored separate from the slices of physical storage allocated to the logical volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.