Selecting records: You can select the SMF records you want to write by specifying either the type desired (or the types not desired) with the TYPE or NOTYPE option of the SYS or SUBSYS parmlib parameter. If any one of record types 14, 15, 17, 62, 63, 64, 67, or 68 is specified with the TYPE option, data is collected for all of those record types. However, only those records that are selected by a TYPE or NOTYPE request are written to the SMF data set.
Installation-written exit routines IEFU83, IEFU84, and IEFU85 (SMF writer) and IEFACTRT (termination) can control which records are to be written to a SMF data set. After inspecting an SMF record, these routines return a code to the system indicating whether the record is to be written to a SMF data set.
Directing records to a log stream: For SMF log stream recording, you can direct record types to particular log streams using the TYPE subparameter on LSNAME. You still select the records you want to write with the TYPE/NOTYPE option of SYS or SUBSYS. Note that this means that it's possible to specify record types on the TYPE subparameter of LSNAME that the system is not actually recording, because they are not specified on SYS or SUBSYS.