Author: steve-myers
Subject: Re: Reply to: CONTIG for performance?
Posted: Thu Jun 15, 2017 8:21 am (GMT 5.5)
I'm not so sure about performance here. You might get a tiny reduction in CPU usage by cheating on some device dependent calculations, but I can't imagine any real I/O improvement unless you are also allocating in cylinders and you are using "multi-track" CCW read commands
Subject: Re: Reply to: CONTIG for performance?
Posted: Thu Jun 15, 2017 8:21 am (GMT 5.5)
| enrico-sorichetti wrote: |
| IIRC contig was/is used when trying to squeeze the last drop of I/O dasd performance using highly optimized ccw chains |