I deal with this also. The problem I have is that I can't justify the cost of the tools when the PC solution works, and is actually less money when you add the cost of all the other stuff on the mainframe.
-----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of David Kreuter Sent: Friday, December 03, 2004 7:37 AM To: [EMAIL PROTECTED] Subject: Re: Linux Slowdown I too deal with this all the time. Many Pof C's consist of clients dumping PC server workload exactly as is into linux virtual machines. Not going to be kind to a "Z" box. When I ask for "Z" performance data or PC and SUN server data I usually get a blank stare. One client that is having major performance problems on "Z" linux is too busy to turn monitor on! Let alone have a performance tool. It's not that hard to instrument. And you want a silver bullet? 5 minute answer? What? One trend that really concerns me is the move to "P" series linux. Watch out: if "Z" P of C's are done improperly we will lose many opportunities to get linux on VM shops up running and stable - with acceptable performance and costs. Server data usually consists of a 1 page sheet listing the CPU speeds and memory size of the boxes. That's configuration data. When I finally prodded a client into a weeks worth of data from 8 servers the results were enlightening. End of the day it's nothing new, business as usual really. David Kreuter Rob van der Heij wrote: >On Thu, 2 Dec 2004 20:52:31 -0500, Post, Mark K <[EMAIL PROTECTED]> wrote: > > > >>some people don't yet have enough backing from management to do that. Too >>many people keep hearing that Linux is free (instead of Free), and they >>don't understand why it gets so expensive. Of course, doing things the >> >> > >Sure... Want to know how much time I wasted last month trying to look >into a performance issue with a customer where I did not have the >proper tools to do so? That time was probably worth a year's contract >for the right tools. But sometimes you cannot get it done the way you >like it. > >It is just so sad to see a proof of concept fail just because they did >not get the right tools and people to fix the default tuning >parameters. > >Rob >-- >Rob van der Heij rvdheij @ gmail.com > >---------------------------------------------------------------------- >For LINUX-390 subscribe / signoff / archive access instructions, >send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit >http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
