Thanks Mark/Ann. I very much believe - and have yet to be proven wrong that performance is the most critical and most difficult issue to solve to make linux on s/390 meet the costs criteria.
You need DASD information, network information, storage information, and you need it from both Linux and from z/VM. z/VM is a SHARED environment, that is what helps linux on VM meet the costs criteria. If one process or server starts using significant amount of any shared resource, then that resource becomes unavailable for other servers, and thus a bottleneck. Would you drive a car without a gas gauge? (maybe, but not too far). or without a speedometer? (only on the autobahn), or how about without a steering wheel? (Only on a railroad track). (There are ways round most everything). If you have never been in a car, this doesn't mean much, and you don't understand why you need these things. There's many folks new to s/390, and VM, just like driving a car, there's things to learn. And there's lots of people that run out of gas time and time again, but won't buy the gas gauge. So yes, you can operate without a performance monitor, until the car stops. Then you need to know why it stopped or even IF it stopped. Next step, look for a monitor that will show you full DASD details, network details, storage, processor,2qinux process data, and is widely used by installations that are allowed to choose their monitor. (Sorry to limit your gas guage choices, but you DO want to know when you are low on gas???) (And by the way, the Velocity Software VM system is on the internet, with attempts to hack it every day, and RACF protects and reports sufficiently to ensure our assets are fully protected....) So a question for the masses. How much CP free storage does it take to support 97,000 guests on VM, and how much CP free storage can CP actually support with it's 2GB limitations??? > >One thing that other people have alluded to (other non-IBM >products) but not mentioned by name is Velocity Software's >performance monitoring suite. It's considered best of breed by >many (hi Barton!), and there is an option Linux/390 performance >monitoring component that will most likely be very useful to >you. They're the folks that host linuxvm.org for us, so I like >to plug them everyone once in a while. :) > >Mark Post > >-----Original Message----- >From: Kittendorf, Craig [mailto:[EMAIL PROTECTED]] >Sent: Tuesday, June 04, 2002 11:33 AM >To: [EMAIL PROTECTED] >Subject: What's needed with z/VM? > > >We're currently have SuSE Linux/390 in an LPAR. Management is >asking about z/VM and I really know very little about it. > >If we get z/VM to run Linux/390 as guests, what else would be >required (not just desirable) beyond the base z/VM, e.g. RACF or >Top Secret, etc? > >Thanks, > Craig "If you can't measure it, I'm Just NOT interested!"(tm) /************************************************************/ Barton Robinson - CBW Internet: [EMAIL PROTECTED] Velocity Software, Inc Mailing Address: 196-D Castro Street P.O. Box 390640 Mountain View, CA 94041 Mountain View, CA 94039-0640 VM Performance Hotline: 650-964-8867 Fax: 650-964-9012 Web Page: WWW.VELOCITY-SOFTWARE.COM /************************************************************/
