Customizing to use DFSORT to improve File Manager performance

File Manager can use DFSORT to improve the performance of the Data Set Copy and Data Set Print functions under ISPF and in batch.

If DFSORT is enabled, its COPY function will be used to copy data to Auxiliary Storage (VSAM RRDS) when editing large data sets under ISPF. File Manager accesses DFSORT using the aliases ICEDFSRT and ICEDFSRB.

File Manager will use DFSORT provided it can find DFSORT and verify that it is at the correct maintenance level for File Manager use. DFSORT is an optional, priced feature of z/OS®; you must have a DFSORT license to use DFSORT outside File Manager. However, the DFSORT code is always shipped with z/OS®; as long as you did not delete the DFSORT libraries when you installed z/OS®, you can enable File Manager to use the DFSORT code.

The following topics describe how you can customize File Manager to use DFSORT or a sort product from an independent software vendor.