Rapid recovery from loss of storage device cache
US9063908B2 · kind B2 · utility
1Cited by
18References
20Claims
0Family size
Assignee
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Key dates
| Filing date | May 31, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jul 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0802
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Dirty data in a storage device is made current through rapid re-silvering, which uses a mirrored and up-to-date version of the dirty data from another storage device to recover the data. Because under rapid re-silvering cache metadata in volatile memory survives the failure of the cache, the cache metadata is used to determine which subset of data from the other storage device needs to be copied to the storage device being re-silvered. During re-silvering, cache metadata is used to determine which I/O requests from clients are requests for data that is not stale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.