Doesn't VMware on Intel provide the same advantage as z/VM when compared to
discrete servers? In the case where there is no z/OS system (so that data
sharing and communicating with z/OS are moot) why use z/VM instead of
VMware?
- doug
Joseph Temple
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Re: Why Zseries
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Linux on 390 Port
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Let me add to what Joe added.
When you combine the low utilization that many (not all) dense rack
mounted servers run at it becomes even easier for z to win the
througput/KVA race. Even if we don't include non production servers and
look at clusters for a single application, the peak composite utilization
of distributed solutions is very often under 25%. Adding non production
servers, mixing applications and doing workload management with VM can
increase utilization leverage on relative capacity well above the 4 to 1
indicated by the production data.
Joe Temple
Executive Architect
Sr. Certified IT Specialist
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Home office 845-338-1448 Home 845-338-8794
Joe Poole
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Linux on 390 Port
On Thursday 10 February 2005 01:32 pm, Levy, Alan wrote:
> David - thanks. This is what that I was looking for.
>
Let me add to what Dr. David said with a few metrics. The densely
packed servers of today draw between .1 and .7 kVA of power. If you
take .3 kVA as an average, it takes only 15 servers to match the 4.5
kVA of a z900. Add more CPUs and internal disk to the servers, and
it's not uncommon to find a single server rack that exceeds the power
requirements of the zSeries with a Shark thrown in for good measure.
I've heard that it's become difficult to add the required power to some
of the buildings in NYC to support the server induced power load.
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