Update the sample EDGUX100 exit module based on the pools you define using the VLPOOL command in parmlib. The supplied sample EDGUX100 exit module supports pooling based on job name and data set name. Modify the supplied exit if you set up pools that are based on other criteria.

To use the exit module, you must follow these steps:

1. Copy the sample EDGUX100 exit module. If you are already using an EDGUX100 exit module to support another function, you can either:
   • Use the existing exit module as your starting point, or
   • Use the sample exit module after merging in any changes that you have previously made.
2. Update the exit module, bearing in mind this information:
   • Only perform your processing when the PL100_CAN_POOL bit is set to B'1'.
   • Your decisions on pooling must be possible whether the exit is called for MNTMSG processing, pre-ACS processing, or for OPEN processing. Your pooling decisions must work when a WTO address is provided during MNTMSG processing, an ACERO is provided during pre-ACS processing, or a JFCB address is provided during OPEN processing.
   • Based on your pooling decisions, optionally select a pool for the current request and set the PL100_POOL field. You must also set the PL100_SET_POOL flag to B'1' for DFSMSrmm to use the PL100_POOL field. You can also optionally set the PL100_SET_ACLOFF flag to B'1' to request that the tape drive cartridge loader is not indexed for the request. See Supplying a scratch pool name and Using the system name to select a scratch pool for additional information.