Type of device

For optimal performance, use high performance devices such as IBM's Enterprise Storage Server (ESS) or TotalStorage DS8000 for input, output, and work data sets to gain the advantages of higher data transfer rates and multiple path access. Other ways of improving DFSORT processing of the input and output data sets are as follows:

Use multiple channel paths
Allocate enough primary space for the output data sets to avoid the need for additional extents.
Use separate devices for the input and work data sets, and for the output and work data sets. (DFSORT application data sets that are accessed concurrently should reside on separate devices.)