Uniquely identifying block context signatures in a storage volume hierarchy
US7996636B1 · kind B1 · utility
139Cited by
73References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 6, 2007 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Feb 22, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique uniquely identifies block context signatures in a storage volume hierarchy of a storage system. In particular, the technique assigns unique volume identifiers (“IDs,” e.g., buffer tree or “bufftree” IDs) to volumes of the storage volume hierarchy, and allows clone volumes to determine that data blocks belong to an appropriate ancestor volume (e.g., and were written by the ancestor volume prior to creation of the clone). In this manner, the novel technique may uniquely identify and accurately determine whether an accessed data block is a correct data block (e.g., alleviating occurrences of data ID aliasing).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.