Using SMF log streams

During initialization, SMF searches the SMFPRMxx parmlib member to see whether the system is using log streams or SMF data sets to record SMF data. If the member specifies RECORDING(LOGSTREAM), SMF will write the SMF data to the log streams specified on the DEFAULTLSNAME and LSNAME parameters of the SMFPRMxx member. You can define a default log stream name on DEFAULTLSNAME, and request particular record types go to particular log streams using the TYPE subparameter on the LSNAME parameter.

To use SMF logging, you must specify the following parameters in SMFPRMxx:

RECORDING(LOGSTREAM) to specify that you wish to write SMF data to log streams rather than SMF data sets.

LSNAME, to specify a log stream in which you want to write particular SMF record types, specified on the TYPE subparameter, as follows: Start of change

LSNAME(logstreamname,TYPE({aa,bb}|{aa,bb:zz}|{aa,bb:zz,...}),NOBUFFS(MSG|HALT),
BUFUSEWARN(nn),DSPSIZMAX(nnnnM|nG),COMPRESS(PERMFIX(nnnnM)))

DEFAULTLSNAME, to specify a default log stream to which all SMF data not otherwise specified on LSNAME parameters will be written.
```
DEFAULTLSNAME(logstreamname,NOBUFFS(MSG|HALT),BUFUSEWARN(nn),DSPSIZMAX(nnnnM|nG),
COMPRESS(PERMFIX(nnnnM)))
```

Note that you do not have to specify both DEFAULTLSNAME and LSNAME, but you must specify log streams on one or the other for SMF logging to take place.

If you specify duplicate record types to different log streams, the system will record and dump the duplicate records.