Efficient recovery of storage gateway cached volumes
US9268651B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2012 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | May 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/468
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for efficient recovery of cached volumes at storage gateways are disclosed. To recover, after an unplanned shutdown, a storage gateway appliance configured to cache chunks of a storage object, chunk metadata corresponding to a particular chunk is read into an in-memory metadata region from a first metadata location. Based on analysis of the chunk metadata, a validation requirement indication for the particular chunk is stored, and the chunk is designated as being accessible for client I/O requests. In response to receiving a subsequent I/O request targeted to the particular chunk, the chunk metadata is validated using a different metadata location prior to performing the requested I/O operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.