>From: "Gibney, Dave" <[email protected]>
> Still, why worry about details the system will handle for you.
I agree 100%. I told our programmers long ago to stick to
BLKSIZE=0 *and* DSORG=PS for datasets on DASD. This always work
(BLKSIZE close to half track).
> Behalf Of Ted MacNEIL
> On tape, it's as close to the maximum as possible.
I thought BLKSIZE=0 would also let the system choose the optimal bloksize
for datasets on tape. I'm starting to review datasets on tape the way Lizette
is doing, and I can see that in some cases the chosen bloksize is really poor.
(i.e. RECFM=FB,LRECL=22,BLKSIZE=0 in jcl, but I see BLKSIZE=4620 under
DFSMSrmm)
In my DEVSUPxx I have only coded COMPACT=YES.
I can't understand why such poor BLKSIZE are chosen. I would really appreciate
if anyone could shed some light on this.
TIA
Walter Marguccio
z/OS Systems Programmer
BELENUS LOB Informatic GmbH
Munich - Germany
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