Hi, David.
I have found that is such situations (VSE under VM under VM), having a
very good performance monitoring and analysis package can make your life
(and the performance of your external guest systems) much better.
DJ
Wakser, David wrote:
John:
The answer is very simple: we are an outsourcing company, and
some of our clients have their own VM systems. For a variety of reasons
(including pesky auditors), we cannot merge the VM systems!
Thanks for the information - I was really wondering whether
devices could be defined as accessible to all LPARs, which 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 EMIF
to define all the devices to all LPARs. That's what I do here. We share
all our disk and tape devices. Some ESCON devices cannot be EMIF'ed such
as 2074 controllers (we use a Visara for our consoles and it does
support EMIF).
If I understand you correctly, you have a single LPAR on the z800
running z/VM. Under that z/VM, you are running second level z/VM's.
Under the second level z/VM's you are running z/VSE (third level). My
question is: "Why?" Why have those second level z/VM systems? Why don't
you run the z/VSE systems under the first level z/VM instead?
--
John McKown
Senior Systems Programmer
HealthMarkets
Keeping the Promise of Affordable Coverage
Administrative Services Group
Information Technology
This message (including any attachments) contains confidential
information intended for a specific individual and purpose, and its
content is protected by law. If you are not the intended recipient, you
should delete this message and are hereby notified that any disclosure,
copying, or distribution of this transmission, or taking any action
based on it, is strictly prohibited.
-----Original Message-----
From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of Wakser, David
Sent: Friday, July 28, 2006 8:04 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: 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 problems).
From my reading, I have gathered that the correct way to
handle this is to put the 2nd-level VMs (and their VSE systems) on their
own LPAR.
My question: never having been involved with LPARs, how
difficult (or easy) is it to be able to move devices from one LPAR to
the other quickly? That is my main concern. We have multiple CPUs and
need to be able to move tape, disk, and printers around quite often.
And, in the same CPU, we often need to mode OSA connections. Is all of
this doable?
David Wakser
InfoCrossing
Confidentiality Note: This e-mail, including any attachment to
it, may contain material that is confidential, proprietary, privileged
and/or "Protected Health Information," within the meaning of the
regulations under the Health Insurance Portability & Accountability Act
of 1996. If it is not clear that you are the intended recipient, you are
hereby notified that you have received this transmittal in error, and
any review, dissemination, distribution or copying of this e-mail,
including any attachment to it, is strictly prohibited. If you have
received this e-mail in error, please immediately return it to the
sender and delete it from your system. Thank you.
Confidentiality Note: This e-mail, including any attachment to it, may
contain material that is confidential, proprietary, privileged and/or
"Protected Health Information," within the meaning of the regulations
under the Health Insurance Portability & Accountability Act of 1996. If
it is not clear that you are the intended recipient, you are hereby
notified that you have received this transmittal in error, and any
review, dissemination, distribution or copying of this e-mail, including
any attachment to it, is strictly prohibited. If you have received this
e-mail in error, please immediately return it to the sender and delete
it from your system. Thank you.