> That benchmark reports seems to indicate that there is serious
> performance degradation running 90+ images under z/VM. Has anyone
> here actually run that many or more and had decent throughput? There
> is no dispute that you can bringing up hundreds and thousands of
> images. But can they do some useful work, serious work.

> I am not a M$oft bigot. Far from it. All I run except MQ is
> opensource and Linux. But I would like to know what we get into
> before buying into z/VM and IFL.

We do have customers running well over 100 images, but there are not
many of those. The largest customer I have has around 80 Linux images
running on 4 IFLs on a z990.

The study is skewed in that the Linux images were all very stressed.
MS picked a workload which is one we would NEVER recommend to run with
Linux on zSeries, specifically very high use servers, and then
constrained the available memory and resources for each Linux image.

IBM does have a response to this report, but we can not post it
publicly. You have to get your IBM rep to get a copy of the rebuttal
and he/she can discuss it with you.

Jim

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