http://www-01.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.ikjc500/ikj2l2_Example_28__Allocate_a_new_DASD_data_set.htm
alloc ds('k9345p.report2') new dsorg(ps) recfm(f,b,a) +
lrecl(133) avblock(133) avgrec(u) space(5000,500) release
A 3390 cylinder is 850KB, half track blocking will get you about 800KB
so multiply MB by 1.3, VSAM will get you 720KB less CI overhead, so
multiply MB by 1.5, free(10 10) multiply by 2.
On Thu, May 21, 2015 at 8:38 PM, Paul Gilmartin
<[email protected]> wrote:
> I am incessantly mystified by space allocation.
>
> What parameters should I supply to ALLOCATE/BPXWDYN (are they
> the same?) if I want a primary allocation of X bytes and secondary
> allocation of Y bytes? I know it will be rounded to a track boundary;
> I don't mind that.
>
> (Maybe a similar question for JCL DD.)
>
> -- gil
>
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--
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?
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