Systems and methods for reverse point-in-time copy management in a storage system
US9733862B1 · kind B1 · utility
22Cited by
14References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 18, 2016 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Mar 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method may include generating a chain of snapshot point-in-time copies (PITCs) for a virtual volume, the chain comprising one or more reverse PITCs and one active PITC, such that: (i) read operations to a snapshot pointing to a reverse PITC traverse a portion of the one or more reverse PITCs in a direction of the chain from the reverse PITC pointed to by the snapshot to the active PITC in order to return data responsive to the read operations to the snapshot; and (ii) read operations to the virtual volume traverse only the active PITC in order to return data responsive to the read operations to the virtual volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.