now, i thought the strenght of the S/390 was not to run linux in an LPAR,
but to run VM in the LPAR, and run linux within the VM.
Thank You,
Ben Kochie (ben at nerp.net)
"Unix is user friendly, Its just picky about its friends."
On Thu, 5 Apr 2001 Nick.T.Reinking at supervalu.com wrote:
> Well, we're only really experimenting with it here. This is an actual
> production box, so we're not going to play around seeing how many
> Linuxes we can get going.
>
> The biggest problem I could see is that it had a poor response time
> for CPU intensive tasks. While a 'bonnie' to do a byte-by-byte write
> would be mean to a normal machine, it was brutally slow on the S/390.
>
> For example, we have Linux in an LPAR w/ 1024MB of memory. This LPAR
> resided on a 6 CPU 1,271 MIPS partition w/ 18GB of memory. When doing
> normal "stuff", like code compiling, etc - it really was just about as fast as
> the PII-400 sitting on my desk. This is all subjective, of course.
>
> - Nick Reinking
>
>
>
>
>
> chrome at real-time.com, on 04/05/2001 02:34:09 PM
> To: tclug-list at mn-linux.org @ PMDF
> cc:
> Subject: Re: [TCLUG] Z-Series thread
>
> > According to the 390 presentation, the sales guy made it sound like the 1mil
> > dollar box was able to support the 4000 instances.
> Bob, you know better than to take figures like that as being firm.
> :)
> FWIW; I think as long as people aren't doing ecommerce; 4000 virtual
> machines on a single $1M machine isn't unreasonable. Especially once the
> kernel gets a better scheduler for running as a VM, and isn't wasting
> processor interrupts just checking to see if there's anything to do.
> But like Nick said; if people are doing heavy dbase stuff, it'll
> hurt a bit more. the fact that figures vary so wildly from source to source;
> shows just how little *anyone* knows about running large numbers of virtual
> machines. I don't think there's more than a handful of people who really
> have much experience at this.
>
> Nick, how many virtual machines are you running, and under what
> load? what's your experience with their responsiveness? (mind you, I realize
> that what you're doing is radically different from what we're proposing
> here. you probably have a few machines at high load; whereas we're talking
> about many machines at low load).
>
> > For what? The presenter made it sound like if you just bought VM and the Linux
> > VM stuff that was it for cost. They have special pricing for Linux instances.
> hardware support.
> you don't buy a Cisco router without support; nor a Sun E4500. same
> difference here. :)
>
> > As I said before. Pipe dream. I have not done any pricing models yet. And of
> > course, I was just going on what the sales guy presented, which is always
> going
> > to be rosey colored.
> I spent about a year smoking that same pipe. I guess I finally
> rubbed off enough on Bob. :)
>
> Carl Soderstrom.
> --
> Network Engineer
> Real-Time Enterprises
> (952) 943-8700
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