Assigning device adaptors to use to copy source extents to target extents in a copy relationship

摘要

Provided are a computer program product, system, and method for assigning device adaptors to use to copy source extents in source ranks to target extents in target ranks in a copy relation. A determination is made of an order of the target ranks in the copy relation. Target ranks in the copy relation are selected according to the determined order. For each selected target rank, indication is made in a device adaptor assignment data structure of a source device adaptor and target device adaptor of the device adaptors to use to copy the source rank to the selected target rank indicated in the copy relation, wherein indication is made for the selected target ranks according to the determined order. The source ranks are copied to the selected target ranks using the source and target device adaptors indicated in the device adaptor assignment data structure.

主权项

1. A computer program product for copying data in a storage system comprised of ranks of extents of data by performing operations, the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therein that executes to communicate with device adaptors and to perform operations, the operations comprising:
providing copy relation information for a copy relation to copy a plurality of source extents in source ranks to a plurality of target extents in target ranks in the storage system; determining an order of the target ranks in the copy relation; selecting target ranks in the copy relation according to the determined order; for each selected target rank, indicating in a device adaptor assignment data structure a source device adaptor and target device adaptor of the device adaptors to use to copy the source rank to the selected target rank indicated in the copy relation, wherein indication is made for the selected target ranks according to the determined order; and copying the source ranks to the selected target ranks using the source and target device adaptors indicated in the device adaptor assignment data structure.