Title: Performance under z/VM 5.1
All:
One of our CPUs (z800 box) was recently set up with z/VM 5.1, not in LPAR mode. The trouble is that we run several 2nd-level VMs and the performance on that box has been miserable (some of the VSE machines had to be moved off, due to performance
prohibited.
-Original Message-From: The IBM z/VM
Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Wakser,
DavidSent: Friday, July 28, 2006 8:04 AMTo:
IBMVM@LISTSERV.UARK.EDUSubject: Performance under z/VM
5.1
All:
One of our CPUs
(z800 box) was recently set
you have
answered.
David Wakser
InfoCrossing
From: McKown, John [mailto:[EMAIL PROTECTED]
Sent: Friday, July 28, 2006 9:16 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Performance under z/VM 5.1
Why move devices? I hope you are using ESCON connections. Just use
Title: RE: Performance under z/VM 5.1
Dave:
But we are dealing with z/VM 5.1 - which has removed the V=R capability!
David Wakser
-Original Message-
From: Dave Jones [mailto:[EMAIL PROTECTED]]
Sent: Friday, July 28, 2006 12:08 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re
Title: RE: Performance under z/VM 5.1
Probably yes. Itll cost you all
kinds of annoyance and assorted PITAs from an operational standpoint, but for
your constraints, it probably will run better.
David Boyes
Sine Nomine Associates
:
Yes, I know the
problem started with z/VM
12:08 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Performance under z/VM 5.1
According to IBM, both the z800 and the z900 will tun in basic as well as
LPAR mode. They are the last models of the zSeries to support both, the
z890, z990, and z9 run in LPAR mode only.
DJ
Confidentiality Note: This e
Title: RE: Performance under z/VM 5.1
Dave:
In spite of the bad match (which I warned them about), will moving the 2nd-level VM systems (and their 3rd-level VSE machines) to separate LPARs compensate? Or should we downlevel the VM if we cannot upgrade the CPU?
David Wakser
On Friday, 07/28/2006 at 11:47 AST, Wakser, David
[EMAIL PROTECTED] wrote:
You have asked the correct question, since I am pretty certain that
the SIE
is the problem (older VMs had 3, and that was reduced). Any answers to
the
question: will replacing a single LPAR running z/VM (and 2nd
Title: RE: Performance under z/VM 5.1
Alan:
Thanks for your input, but in re-reading my post, I phrased it incorrectly; the question (which I think you really answered in the affirmative) was: will placing the present 2nd-level VMs (and their current 3rd-level guests) in a separate LPAR
On Fri, 28 Jul 2006, Dave Jones wrote:
According to IBM, both the z800 and the z900 will tun in basic as well
as LPAR mode. They are the last models of the zSeries to support both,
the z890, z990, and z9 run in LPAR mode only.
basic ... interesting concept.
Sounds like a neat idea. Must be
If your channels are ESCON/FICON you simply share you DASD/TAPE amongst all
the LPARs. If you have any parallel channels, then you put each LPAR that
would need them in an Eligible list in the IOCP. Then you can
Reconfigure the channel from one LPAR to another. It's basically a
logical move of
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