[geeks] Careeer shifting

[Ken Hansen]

Mainframes can be sliced up in many ways, including soft (or virtual)
machines, sharing the common resources of the mainframe, or physically,
where multiple physical machine images are defined, each of which can be
running a differnet level of microcode in the CPU. This closely mimics the
operation of E10K processor division s I understand it...

Mainframes did this almost 15 years ago - machines from Amdhal had a
function called PR/SM (I think was the name)...

Mainframes offer much more than the OS level "multiple machines" you
mentioned...

Ken
----- Original Message -----
From: "Brian Hechinger" <wonko at arkham.ws>
To: <geeks at sunhelp.org>
Sent: Sunday, August 26, 2001 8:22 PM
Subject: Re: [geeks] Careeer shifting


> On Sun, Aug 26, 2001 at 08:21:57PM -0400, Ken Hansen wrote:
> >
> > Second, the E10K has the magical ability to appear/operate as if it were
> > several smaller boxes (by partioning the system CPUs to different
*whatever
> > they are called*(I have never worked with one)),a nd finally, Mainframes
are
>
> domains.  and a domain is nothing at all like a Virtual Machine.  on a
mainframe
> when it's your turn to run, you get the entire machine.  when you split an
e10k
> up into domains, each "machine" is limited to what you allocate to that
domain.
>
> > *typically* an *order* of magnitude faster at I/O than almost anything
> > else... Mainframes are designed for throughput first, then CPU speed -
E10K
> > (in my opinion) was the reverse (focus on CPU first, then bring the I/O
up
> > to snuff).
>
> i have yet to see a mainframe with a CPU that can touch anything else on
the
> market.  i also have yet to see anything else on the market that can touch
the
> I/O of a mainframe.
>
> -brian
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> GEEKS:  http://www.sunhelp.org/mailman/listinfo/geeks


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