SAS(R) 9.1.3 Companion for z/OS

474 LOGPARM= System Option Chapter 18
Syntax Description
OPEN=
when a log file already exists, controls how the contents of the existing file are
treated.
APPEND
appends the log when opening an existing file. If the file does not already exist, a
new file is created. This option cannot be used if the LOG= system option specifies
a member of a PDS or PDSE.
REPLACE
overwrites the current contents when opening an existing file. If the file does not
already exist, a new file is created.
REPLACEOLD
appends the log when opening an existing file. If the file does not already exist, a
new file is created. This option cannot be used if the LOG= system option specifies
a member of a PDS or PDSE.
Default: REPLACE
ROLLOVER=AUTO|NONE|SESSION
controls when or if the SAS log “rolls over,” that is, when the current log is closed
and a new one is opened.
AUTO
causes an automatic “rollover” of the log when the directives in the value of the
LOG= option change, that is, the current log is closed and a new log file is opened.
Interaction: The name of the new log file is determined by the value of the LOG=
system option. If LOG= does not contain a directive, however, the name would
never change, so the log would never roll over, even when ROLLOVER=AUTO.
Note: Because the directives do not resolve, specifying a % instead of a #
would result in an invalid name for a native z/OS user. R
NONE
specifies that rollover does not occur, even when a change occurs in the name that
is specified with the LOG= option.
Interaction: If the LOG= value contains any directives, they do not resolve. For
example, if Log="#b.log" is specified, the directive “#” does not resolve, and the
name of the log file remains "#b.log".
SESSION
at the beginning of each SAS session, opens the log file, resolves directives that
are specified in the LOG= system option, and uses its resolved value to name the
new log file. During the course of the session, no rollover is performed.
Default: NONE
Interaction: Rollover is triggered by a change in the value of the LOG= option.
See Also: LOG= system option
WRITE=
specifies when content is written to the SAS log.
BUFFERED
writes content to the SAS log only when a buffer is full in order to increase
efficiency.
IMMEDIATE