Using the DFSMSrmm EDG_EXIT100 installation exit

Use the DFSMSrmm EDG_EXIT100 installation exit to perform these tasks:

Plan for scratch pools as described in Planning to manage scratch pools with EDG_EXIT100
Perform pooling management as described in Managing scratch pools to:
- Manage scratch pools based on job name and data set name.
- Select a pool to use for a nonspecific tape volume request.
- Select a specific pool to use for a nonspecific tape volume request and request that the tape drive cartridge loader is disabled.
Ignore foreign or duplicate volumes as described in Ignoring duplicate or undefined volume serial numbers and optionally provide an external volume serial number for use in messages intercepted and updated by DFSMSrmm.
Override the system default retention method when you create a new tape volume set or rewrite an existing set from the first file, as described in Specifying the retention method to be used for new tape data sets.
Override DFSMSrmm VRSEL processing for specific data sets as they are created or rewritten, as described in Excluding specific data sets from VRSEL processing as they are created or rewritten.
Use JCL special expiration dates to manage volumes by setting vital record specification management values to retain data sets as described in Using vital record specification management values to retain tape volumes.
Pass pooling decisions to pre-ACS processing so that they can be used in ACS routines to assign storage group and management class as described in Using the EDG_EXIT100 installation exit from pre-ACS processing.
Set any expiration date, including a zero value, for a data set as described in Assigning expiration dates.
Obtain information that is described in Creating sticky labels to modify input from DFSMSrmm disposition processing.
Request the recording of only the first file on a multifile volume as described in Controlling tape volume data set recording.
Change the location for a volume as described in Changing location information with EDG_EXIT100.
Support the use of the storage group name for pooling for volumes that reside in manual tape libraries as described in Using storage group for manual tape library pooling.