Detection of logical corruption in persistent storage and automatic recovery therefrom
US9892756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2015 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Mar 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/81
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, and computer program product for restoring blocks of data stored at a corrupted data site using two or more mirror sites. The method commences by receiving a trigger event from a component within an application server environment where the trigger event indicates detection of a corrupted data site. The trigger is classified into at least one of a plurality of trigger event types, which trigger event type signals further processing for retrieving from at least two mirror sites, a first stored data block and a second stored data block corresponding to the same logical block identifier from the first mirror site. The retrieved blocks are compared to determine a match value, and when the match value is greater than a confidence threshold, then writing good data to the corrupted data site before performing consistency checks on blocks in physical or logical proximity to the corrupted data site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.