RE: Adding LPARs without POR
- From: John.Mckown@xxxxxxxxxxxx (McKown, John)
- Date: 25 Apr 2006 13:20:16 -0700
-----Original Message-----
From: IBM Mainframe Discussion List
[mailto:IBM-MAIN@xxxxxxxxxxx] On Behalf Of R.S.
Sent: Tuesday, April 25, 2006 3:04 PM
To: IBM-MAIN@xxxxxxxxxxx
Subject: Re: Adding LPARs without POR
<snip>
Why ?
IMHO it *depends*. Is it so common to run few z/OS LPARs and hundreds
Linux images ? I know datacenters running several LPARs (monoplexes,
completely separated systems), *few* Linux images ...and bunch of
Windows servers<g>
One of the datacenters is using Linux under IFL. 2-4 images. Is it
really cost effective to buy z/VM for this poor z/800 machine ?
Is it really needed at all ?
Just my $0.02
--
Radoslaw Skorupka
I do agree that the configuration should be based on the need of the
company. I guess that I was speaking generically without stating some of
my assumptions.
In the case of a very few LPARs (less than 5 or 6?), then z/VM is likely
to be overkill. But I think that the original person was indicating that
they were going to have a LOT of Linux images, not just a few. For me,
in most cases, I would likely suggest doing z/OS in LPARs (since PR/SM
is "free" (gratis/bundled) and z/VM costs more per CPU to license on a
general CPU than on an IFL (IIRC)). I would assign all the IFLs to a
single LPAR running z/VM. Again, most cases I envision would likely have
a fair number of Linux images running due to the "one function, one
image" that seems to be "in vogue" with even Linux people. There is even
a "push" to have multiple z/OS LPARs here to "separate activity for
better control." <bronx cheer>
--
John McKown
Senior Systems Programmer
HealthMarkets
Keeping the Promise of Affordable Coverage
Administrative Services Group
Information Technology
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