1. A computer-implemented method comprising: identifying a logical node, said logical node being associated with one or more source stages; identifying one or more file block components, said one or more file block components comprising a retrieval target for at least one of said one or more source stages; identifying one or more physical nodes; determining, for each of said one or more physical nodes, a degree value; identifying one or more qualified physical nodes from said one or more physical nodes having said degree value of one or more; creating a preferred physical node table, said preferred physical node table comprising, for each of said one or more qualified physical nodes, an identifying indication and an indication of said degree value; and sorting said preferred physical node table based on said degree value associated with each of said one or more qualified physical nodes.