6. DATA SOURCES › 6.2 Data Collector and Processing Considerations › 6.2.1 SMF Recording Options › 6.2.1.6 SMF Exits

6.2.1.6 SMF Exits

SMF exits give installations the ability to monitor, modify,
and validate job-related information, allow leniency for
exceptional violators of job limits, monitor and/or suppress
outbound SMF records, and perform action when SMF recording
data sets become full.

The EXITS/NOEXITS option of the SYS or SUBSYS parameter
specifies the SMF exits to be taken.  Exits specified in the
SYS parameter apply to all subsystems.  Exits specified in
the SUBSYS parameter apply to a particular subsystem and
override EXIT specifications in the SYS parameter.

The complete list of available SMF exits applicable to your
system will be found in the System Management Facilities
(SMF) manual for your version of MVS.  Some of the most
commonly used SMF exits are shown below.

   o  SMF exits that give you the ability to monitor and
      modify information at event occurrence time:

        IEFUJV - job validation exit
        IEFUJI - job initiation exit
        IEFUSI - step initiation exit

   o  SMF exits that give you the ability to monitor and
      extend job time and SYSOUT line limits:

        IEFUTL - time limit exit
        IEFUSO - SYSOUT line limit

   o  SMF exits IEFU83, IEFU84, and IEFU85 let you examine
      and suppress SMF records just prior to their being
      written.

   o  SMF exit IEFU29 lets action be taken when an SMF data
      set becomes full.

Two other useful SMF exits are:

   o  IEFACTRT - used to access job and job step information
                 at termination time.

   o  IEFUJP   - used to modify or add information at job
                 purge time.