I use to work at a shop that had such a ZAP. (I called it the million
dollar zap).
The main reason for the zap is to make restarting a production ABEND
a no brainer. No special software to adjust the GDG numbers in a
restarted job.
Granted changing to or from the zap (or a parmlib or job parameter)
is a big deal. As I remember the zap (a long time ago) - it was
really a single NOP of a branch.
The current adjusting the relative GDG number at EOJ rather than at
EOS, does seem a bit strange since the dataset (generally - SMS) is
cataloged at EOS. So it makes sense to adjusting the relative GDG
number at the same point in time. Just my $0.02
Ken Leidner [email protected]
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