Recoverability of a dataset associated with a multi-tier...

Details Recoverability of a dataset associated with a multi-tier... Recoverability of a dataset associated with a multi-tier...

2011-07-12

2011-07-12

Baderman, Scott T (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S002000, C714S042000

Reexamination Certificate

active

07979742

ABSTRACT:
A method and a system of improving recoverability of a dataset associated with a multi-tier storage system are provided. Updates to a dataset are stored in first storage. The dataset and a point-in-time copy of the dataset reside on second storage, and the first storage provides higher reliability than the second storage. The dataset is restored using at least a subset of the stored updates in combination with the point-in-time copy in the event that the dataset is lost.

REFERENCES:
patent: 7552358 (2009-06-01), Asgar-Deen et al.
patent: 2005/0172166 (2005-08-01), Eguchi et al.
patent: 2006/0041719 (2006-02-01), Chui et al.
patent: 2007/0033437 (2007-02-01), Kawamura et al.
patent: 2007/0185923 (2007-08-01), Nishikawa et al.
patent: 2008/0133969 (2008-06-01), Manoj

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