At 16:07 -0500 on 05/18/2009, Paul Gilmartin wrote about Re: BLOCK CONTAINS:
On Mon, 18 May 2009 18:18:20 +0200, Gilbert Saint-Flour wrote:
On Monday 18 May 2009 18:04, Paul Gilmartin wrote:
What a stupid necessity that programmers have to code BLOCK CONTAINS 0 !
What happens if the programmer pre-allocates the data set?
It's still a stupid necessity, but it might help in dealing with
situations where recompilation is impractical.
Well, pre-allocation is not very compatible with HSM, GDG, and a few other
I believe I understand the concern with GDG. (Actually,
my understanding of GDG is so rudimentary I'm not qualified
to doubt the concern.)
GDG will get the blocksize from the DCB= clause, a DCB=DSN reference,
or a DSCB with the DSNAME (without the .GxxxxVyy suffix) on the
volume where the Catalog lives (or has this last last source become
no longer relevant). Thus this information is always there for the
predefined file.
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