System logger

If you are using system logger in a sysplex environment, no further action is necessary for logger data set serialization, as long as SYSDSN is named in the SYSTEM inclusion RNL.

If SYSDSN is not specified as an inclusion RNL, add the following RNLDEF statements:

 RNLDEF RNL(INCL) TYPE(GENERIC) QNAME(SYSDSN) RNAME(IXGLOGR)

Guideline: Add other RNLDEF statements in the system inclusion RNL to cover log streams that are defined with a high level qualifier other than IXGLOGR:

 RNLDEF RNL(INCL) TYPE(GENERIC) QNAME(SYSDSN) RNAME(hlq)
 RNLDEF RNL(INCL) TYPE(GENERIC) QNAME(SYSDSN) RNAME(hlq.lsname)

hlq: Specifies a high-level qualifier associated with a log stream or a staging data set. IBM® supplies two log streams for customer use, the logrec log stream and the operations log (OPERLOG) log stream. You can create your own log streams and your own staging data sets. Each DASD data set that represents a log stream or staging data set begins with the specified high-level qualifier. The high-level qualifier can be specified when you define a log stream or staging data set to the LOGR policy.
lsname: Specifies the portion of the log stream name that limits the scope of the RNLDEF statement to the System Logger-created data sets.

Using the logrec recording medium

The logrec recording medium can be either a logrec data set or a logrec log stream. The logrec recording medium contains data about machine failures, as well as records for program error recording, missing-interrupt information, dynamic device reconfiguration (DDR) routines, and other related data.

If you are using a logrec log stream, follow the instructions above for specifying RNLDEF statements with the high-level qualifier.

If you are using a logrec data set, the default logrec data set name, SYS1.LOGREC, is defined in the default SYSTEMS exclusion RNL as a local resource.

For a single system, if you name the logrec data set SYS1.LOGREC, you do not need to change the data set definition for global resource serialization. If you name the data set something other than SYS1.LOGREC, then there is no need to add the name to the SYSTEMS exclusion RNL.

In a global resource serialization complex environment, IBM suggests you define a unique name for the logrec data set on each system. And, if you do, IBM also suggests that you not put this name in the SYSTEMS exclusion RNL.