Database Scan utility (DFSURGS0)

You use the Database Scan utility to scan databases that are not being initially loaded or reorganized but contain segments involved in logical relationships with databases that are being initially loaded or reorganized.

The following figure shows the input to and output from the Database Scan utility.

Figure 1. Database Scan utility (DFSURGS0)

For input, the utility uses the DFSURCDS control data set created by the Prereorganization utility. For output, the utility produces the DFSURWF1 work data set, which contains prefix information needed to resolve logical relationships. The DFSURWF1 work data set is used as input to the Database Prefix Resolution utility.

This utility is always run before the database is loaded (for initial load) or reloaded (for reorganization).