Lizette Koehler wrote:
Barry,
I have heard that the number of GDGs may be allowed to go beyond 255
generations. Do you have any insight on this? I am wondering how this
enhancement may impact the GDG Wrap condition.
<snip>
GDGEs were introduced with z/OS V2.2 and can have up to 999
generations.* I believe both GDGs and GDGEs both "roll over" from
G9999V00 to G0000V00 these days without needing to be redefined, but I
don't recall when we did that (other than it wasn't recently). The
number of concurrent generations is something you choose when you define
either one.
* We were going for an even thousand until we weighed the value of "one
more generation" against the cost of updating a bazillion messages to
add space for another digit and decided 999 was close enough!
--
John Eells
IBM Poughkeepsie
[email protected]
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