Hi Dennis,
We moved onto an mixed rack of mod 3 and mod 9 3390s on Hitachi disk. We do not have PAV (cost). C are was taken to place data so that performance would still be good. Our heavily hit datasets - database, online VSAM, etc. were keep on mod 3 . T hings like dlibs, res, and some large datasets, and a lot of datasets that have low usage patterns moved to mod 9. We have been fine. YMMV, Linda ----- Original Message ----- From: "Dennis McCarthy" <dmcca...@electricinsurance.com> To: IBM-MAIN@bama.ua.edu Sent: Friday, January 20, 2012 12:03:21 PM Subject: Going from mod-3 to mod9 A couple of questions: 1. We just had 3390-9's configured into our EMC box. This box also contains 3390-3's. Given that the hardware is the same throughout and all other things being equal, is there any decrease in response time on the mod-9's? 2. I have a VSAM file (with extended addressability) that currently spans 27 mod-3's. My plan is to move it to 10 mod-9's using IDCAMS REPRO to back it up then doing a DELETE/DEFINE, (changing the SPACE parameter from CYL(2500 150) to CYL(9500 150)), then REPRO from the backup. Am I setting myself up for a failure? Regards, Dennis ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
