W dniu 2012-06-11 21:58, Roberts, John J pisze:
But in today's world, without SCRATCH in the definition, the oldest
GDG does not get scratched. It gets "rolled off" the GDG base and
becomes a "normal" cataloged dataset entry. So it stays in the
catalog, and can be referenced by absolute name. I wonder if this
would ever be of some use to anyone.
What happens when you hit G9999V00? Does it wrap to G0000V00 or
G0001V00? If so, you could be attempting to catalog a name that
already exists. Not a problem for most generation datasets, but I
would guess that someone would trip over this someday. Especially if
z/OS lasts another 50 years ;-)
There is no need to wait 50 years, usually it takes 30 minutes during
... JCL course. I've taught so many groups where there was at least one
guy who wanted to check it. ;-)
BTW: Much more cumbersome may be "can I submit JOB A from JOB A,
recurrently?"
BTW2: In real world 9999 datasets, even generated more than daily is
ENOUGH. 255 is not of course.
--
Radoslaw Skorupka
Lodz, Poland
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