Patent ID: 9135121
Filing Date: 2015-09-15
Classification: G06F

Abstract:
1. A computer program product for copying data involving at least one storage, wherein the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therein that executes to cause operations, the operations comprising: providing a copy relationship indicating a source set of a subset of source logical addresses in the at least one storage to copy to a target set comprising a subset of target logical addresses in the at least one storage, wherein the source logical addresses map to source tracks and wherein the target logical addresses map to target tracks; receiving an update to a source logical address within the source set of logical addresses that has not been copied to the corresponding target logical address as part of the copy relationship; determining the target logical address corresponding to the source logical address to be updated according to the copy relationship; determining a target group of target logical addresses in the target set that include the determined target logical address, wherein the target logical addresses in the target group are in the target set; determining the source logical addresses in the source set that correspond to the target logical addresses in the target group; and copying the determined source logical addresses to the target logical addresses in the determined target group.