This has been a very interesting thread for me.  If I remember correctly from 
the time I saw the z/10 with plexiglass outsides and a hardware guy there to 
explain what was what, and one of the things he told me was the cpu speed was 
(IIRC) 4.77GHz. 

My laptop has a dual core 1.99GHz.  

You already see where I'm going with this.  How does a z/10 get so much more 
done?  Forgive me for my math and analytical skills, but seems like 4 laptops 
could equal the speed of a 1 cpu z/10.  There is a huge chunk of this equation 
that I'm totally missing.  How does a z/10 get so much more done?

kind regards, Lindy

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
R.S.
Sent: 7. maaliskuuta 2010 2:23
To: [email protected]
Subject: Re: z9 / z10 instruction speed(s)

Edward Jaffe pisze:
[...]
> People with PC-only experience are always astonished when I tell them 
> about modern mainframe provisioning capabilities. They always assume 
> when your hard drive fills up you need a new one or when your CPU is too 
> slow you need a new one. What we do seems like magic to them.

Yes, mainframe capabilities are excellent in this area. From the other 
hand they solve problems which exist only in mainframe world: CPU power 
adjustment. CPU shortage is bad thing on any platform, but mainframe is 
the only one where too much MIPS is not good. Why to downgrade a PC?
The same apply to "specialty" processors.

-- 
Radoslaw Skorupka
Lodz, Poland

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