Reducing stable data eviction with synthetic baseline snapshot and eviction state refresh
US10346354B2 · kind B2 · utility
13Cited by
3References
18Claims
0Family size
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Key dates
| Filing date | Oct 28, 2016 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | May 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/568
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
With a forever incremental snapshot configuration and a typical caching policy (e.g., least recently used), a storage appliance may evict stable data blocks of an older snapshot, perhaps unchanged data blocks of the snapshot baseline. If stable data blocks have been evicted, restore of a recent snapshot will suffer the time penalty of downloading the stable blocks for restoring the recent snapshot. Creating synthetic baseline snapshots and refreshing eviction data of stable data blocks can avoid eviction of stable data blocks and reduce the risk of violating a recovery time objective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.