t.edu] On Behalf Of Graves, Aaron
[aaron.gra...@citi.com]
Sent: Monday, February 01, 2010 15:07
To: LINUX-390@VM.MARIST.EDU
Subject: Re: zLinux operating as a zVM guest host
The overhead of running zLinux on a second-level z/VM is horrendous (Any help
on the way Bill?).
I wouldn't recommend it.
e
201-601-7049
aaron.gra...@citi.com
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Bill
Bitner
Sent: Monday, February 01, 2010 8:43 AM
To: LINUX-390@vm.marist.edu
Subject: Re: zLinux operating as a zVM guest host
To echo Mark's and others
To echo Mark's and others' comments. This configuration is
likely to have a lot of overhead with z/VM on top of z/VM on top of
LPAR. Most customers I've worked with placed your three z/VM systems in
different LPARs. Partitions can be capped similar to LIMITHARD with
Relative Share setting.
To avoi
On Mon, Feb 1, 2010 at 12:50 PM, Walter Wojcik wrote:
> First thanks to all who answered my inquiry. I have one additional
> question.
>
> I read somewhere that there is an RPC client capability that can be used
> to determine what the SHARE is and how the vm is performing vis vie the
> SHARE set
To
LINUX-390@vm.marist.edu
cc
Subject
Re: zLinux operating as a zVM guest host
On Sun, Jan 31, 2010 at 10:41 PM, Mark Post wrote:
> Absolutely. That's why those controls are there in z/VM. I personally
would avoid using LIMITHARD unless absolutely necessary. (I'm not a
On Sun, Jan 31, 2010 at 10:41 PM, Mark Post wrote:
> Absolutely. That's why those controls are there in z/VM. I personally would
> avoid using LIMITHARD unless absolutely necessary. (I'm not a performance
> expert in any way, shape, or form, so take this with some salt.) If you use
> LIMIT
>>> On 1/31/2010 at 02:24 PM, Walter Wojcik wrote:
> The mainframe is a z9 BC class machine. The disks are hosted by a DS6000
> where each zLinux instance will have its own LCU (Logical Control Unit)
>
> If I chose to only use zVM 5.4 could I run all 3 zLinux images in the
> single LPAR and u
Mark,
> You can do this, but I think you'll find that running Linux
> third-level will result in excruciatingly bad performance.
Well, not always - our team had some second-level z/VMs with third-level
Linuxes on a z990 - the performance went from acceptable to *bad* (but
perhaps not *excruciatin
to
Linux on 390 Port
To
LINUX-390@vm.marist.edu
cc
Subject
Re: zLinux operating as a zVM guest host
>>> On 1/30/2010 at 01:19 PM, Walter Wojcik wrote:
> I have an LPAR with 2 dedicated IFL processors. I would like to run 3
> instances of zLinux.
>
> I would like
>>> On 1/30/2010 at 01:19 PM, Walter Wojcik wrote:
> I have an LPAR with 2 dedicated IFL processors. I would like to run 3
> instances of zLinux.
>
> I would like to have the following environment
>
> zVM 5.4
> / | \
>
Walter,
You'ld want to add SHARE settings for the two guests (test & sandbox).
If the main machine has two processors and you want the test machine to use
up to 25% of a processor, then you need to cap it on 12.5% of the
hypervisor's resources..
Please note that a recent apar (november if I rememb
I have an LPAR with 2 dedicated IFL processors. I would like to run 3
instances of zLinux.
I would like to have the following environment
zVM 5.4
/ | \
/ | \
/ | \
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