Parameter type
Keyword, optional
Purpose
Use the SYSOUT parameter to identify this data set as a system
output data set, usually called a sysout data set.
Do not use the SYSOUT parameter for an SMS-managed data set (one
with an assigned storage class).
The SYSOUT parameter also:
- Assigns this sysout data set to an output class. The attributes
of each output class are defined during JES initialization.
- Optionally requests an external writer to process the sysout data
set rather than JES. An external writer is an IBM- or installation-written
program.
- Optionally identifies the forms on which the data set is to be
printed or punched.
- Optionally refers to a JES2 /*OUTPUT statement for processing
parameters.
The sysout data set is processed according to the following processing
options, in override order:
- The options specified on this sysout DD statement.
- The options specified on a referenced OUTPUT JCL statement.
- The options specified on a referenced JES2 /*OUTPUT statement
or on a JES3 //*FORMAT statement.
- The installation default options for the requested output class.
Note: - If a sysout data set has the same class as the JOB statement MSGCLASS
parameter, the job log appears on the same output listing as this
sysout data set.
- An installation should maintain a list of available output classes
and their attributes. Some classes should be used for most printing
and punching, but others should be reserved for special processing.
Each class is processed by an output writer. The system operator starts
the output writers for the commonly used output classes. If you plan
to specify a special output class, ask the operator to start the output
writer for that class. If the writer is not started before the job
produces the sysout data set, the data set is retained until the writer
is started.
- If the automatic restart manager (ARM) restarts a job, JES discards all non-spin sysout
data sets created during the previous execution. (You can avoid losing
that output by adding SPIN=UNALLOC to the DD statement for the SYSOUT
data set.)
References
For information on output writers and external writers, see z/OS MVS Using the Subsystem Interface.