System and method for redundant storage consistency recovery
US7415488B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Apr 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A file system may selectively perform redundancy consistency recovery and synchronization of mirrors and may store dirty file information in a log or journal that indicates the modification of a file. A file system may update saved dirty file information to indicate successful modification of data across mirrors and may keep track of redundancy consistency recovery information on a file-by-file basis or may track the redundancy consistency of portions of files. A file system may also instruct an underlying storage system not to track data modifications, possibly selectively for each I/O request. During synchronization the file system may synchronize its log and use saved dirty file information to determine files to be synchronized. A file system may selectively use file system logging for individual data modification requests and may expose an API allowing applications to specify a redundancy consistency mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.