Ed,

Doesn't a 6250 reel tape only hold about 30MB of data, so you were sorting
about 750MB? Working on SORTWKnn must total twice your input file you are
talking three SORTWKnn of about 500MB.

I can't imagine why it would be such a hard thing to figure out...

Ron

> 
> Thanks for mentioning that. I had forgotten it. But it still begs the
> question how do you code for the value  of n .
> 
> A LONG time ago we had a need to sort 25+ 6250 (BPI) tapes at one
> swat. It could not be broken up (I don't remember why).
> This was a weekly job. The records were also large (18K -IIRC) . The
> first couple of tries were a PITA. We got it to work week in and week
> out after a lot of jcl changing and I think (IIRC) the final winner
> was to use size=e20000000 on the sort statement (20 million) . We had
> to sort the name and address file for a large publishing house. Like
> I said its been ages, so I don't know if they ever found a better
> way. I remember distinctly asking the programmer to write a note in
> the run doc that if the number got over 20 million to update the sort
> control card (and increase the sortwkxxs).
> 
> Ed
> 

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