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Chapter 3. HSC Control Statements and HSC Start Procedure 83
1st ed., 6/30/04 - 312579601
Chapter 3. HSC Control Statements and HSC Start
Procedure
Overview
This chapter discusses two kinds of control statements, PARMLIB (below) and definition
data set (refer to “Definition Data Set Control Statements” on page 103), and the HSC
Start procedure (refer to “Starting HSC Execution” on page 163). For more information
about HSC installation and initialization, refer to the HSC Installation Guide.
PARMLIB Control Statements
Parameter library (PARMLIB) control statements provide you a way, at HSC
initialization, to statically specify various operation parameters. Identifying your system
needs and then specifying various control statements permits you to tailor the HSC to the
needs of your data center.
Some PARMLIB options can be altered after HSC initiation with the HSC running. These
options can be changed using an appropriate operator command. With these options it is
not necessary to stop the HSC and restart it to initialize the new or changed options that
you want to specify. Those PARMLIB control statements that can be altered with the HSC
running are identified as PARMLIB commands or control statements in this chapter.
Any operator command can be specified as a PARMLIB control statement.
Note: Refer to “Syntax Flow Diagrams” on page 429 for the rules and conventions that
apply to command and control statement syntax.
Defining PARMLIB Control Statements
PARMLIB control statements are defined in a sequential data set or a single partitioned
data set (PDS) member that is opened when the HSC is initialized.
The PARMLIB control statements are invoked by specifying MEMBER(xx) or M(xx) on
the /PARM statement in the startup job. The suffix ‘‘xx’’ is concatenated with SLSSYS to
form a name. The name is used as the ddname in the startup job. The PARMLIB data set
(or PDS member) is opened and read to obtain the parameters for running the HSC
software.
Note: It is strongly recommended to use shared data sets for PARMLIB control
statements.