Space efficient cascading point in time copying
AssigneeInternational Business Machines Corporation
InventorsAnan MARIE, Rivka MATOSEVICH-MAYRAZ
Life of this patent
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Abstract
Embodiments for space-efficient cascading point-in-time copying of source data by creating a plurality of cascading point-in-time target copies, the target copies being created at different points in time, are provided. Data is physically copied form the source to a repository to create a physical copy, and a data mapping is created that associates the physical copy with a most recent target copy.
Claims7
A computer implemented method for a space efficient cascading point-in-time copying of source data by creating a plurality of cascading point-in-time target copies, the target copies being created at different points in time, the method comprising:
- physically copying data from the source data to a repository to create a physical copy;
- and
- creating a data mapping that associates the physical copy with a most recent target copy of said plurality of cascading target point-in-time copies.
Dependencies are inferred from the claim text.