In <[email protected]>, on
11/17/2009
at 06:18 PM, Lindy Mayfield <[email protected]> said:
>I read in z/Journal that one mainframe can host 1,500 Linux servers.
The Devil is in the details. What is a server?
>What sort of mainframe can do this?
zSeries.
>How many CPU's would it take?
What is a server?
>How many CPU's are the maximum?
64; I'm not sure about the z11.
>I also read in z/Journal that the lines between a mainframe computer
>(the z10 to be specific) and a super computer are being blurred.
"Supercomputer" was always a marketing term rather than a technical term.
>When I was at GuideSHARE Europe two years ago (in Dresden, lovely city)
>they had a hardware guy there next to a z10 with the nice green stripe
>down it, and he told me that the mainframe is great for transactional
>processing, as always, but not too much suited for WebSphere, Java
>stuff, etc. That's why they had to add speciality engines, etc.
He was blowing smoke; the specialty engines are the same[1] as the regular
engines with different license terms. What was not suitable to those
workloads was IBM's pricing policies, and the specialty engines were just
an artificial way to segregate the workloads.
>Just curious what other people think about this sort of stuff.
The 1500 number may well be valid for I/O bound servers; it's way too high
for CPU bound servers.
[1] Except for the facility that let the software tell
which was which.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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