Do you use the ASI Master Procedure ($ASIPROC) ?
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Today's blog entry is related to the ASI Master Procedure ($ASIPROC).
If you are not aware of it, you can use one ASI Master Procedure ($ASIPROC) to IPL z/VSE systems tailored to their CPU ids.
A typical example of using an ASI master procedure is an environment with multiple z/VSE systems sharing the DOSRES (system residence) disk device or an environment where two or more z/VSE systems run as guest systems under VM.
In the $ASIPROC you can specify the IPL and JCL procedure that should be used dependent on the CPU id.
The $ASIPROC and its content / syntax is described in the z/VSE Guide to System Functions. This book can be downloaded from here.