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AssigneeInternational Business Machines Corporation
InventorsMichael T. Benhase, Theresa M. Brown, Lokesh M. Gupta, Carol S. Mellgren
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A method for performing a write to a volume x in a cyclic point-in-time-copy architecture is described. In one embodiment, such a method includes determining whether the volume x has a child volume. The method then determines whether the target bit maps (TBMs) of both the volume x and the child volume are set. If the TBMs are set, the method finds a higher source (HS) volume from which to copy the desired data to the child volume. Once the HS volume is found, the method determines whether the HS volume and the child volume are the same volume. If the HS volume and the child volume are not the same volume, the method copies the data from the HS volume to the child volume. The method then performs the write to the volume x. A corresponding computer program product is also described.
1-7. (canceled)
A computer program product for performing a write to a volume x in a cyclic point-in-time-copy architecture, the computer program product comprising a computer-readable storage medium having computer-usable program code embodied therein, the computer-usable program code comprising:
Dependencies are inferred from the claim text.