On Mon, Mar 21, 2016 at 8:14 AM, R.S. <[email protected]> wrote:
> Well, > I observed 1,3M IOPS on EC12 or z196 machine during WAS installation. With > minimal CPU utilisation (I mean regular CPU, I haven't checked SAP). > IMNSHO a PC server with collection of new shining Emulex cards has waaaay > worse I/O capabilities. > We did some tests of database operations on PC. Effects are unequivocal. > > BTW: Typical z/OS I/O workload is very different from PC workload. Much > less IOPS, much more data, much less CPU%. > Just relating a story my boss tells. A major U.S. manufacturer decide to move all their z/OS work to a SAP distributed platform. A daily job, which was basically did all the shipping work, ran over a day on the SAP platform (remember, daily job). On the z/OS system, it runs 45 minutes. So they have one, very old, IBM mainframe (don't remember what) which they IPL daily to run this one job, then shut back down until the next day. This is, indeed, "hearsay". But I trust my boss when he says that it is so. > > -- > Radoslaw Skorupka > Lodz, Poland > > > -- A fail-safe circuit will destroy others. -- Klipstein Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
