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Re: [Xen-users] How to initiate a guest installation from the CD-ROM med

To: Ido Levy <IDOL@xxxxxxxxxx>
Subject: Re: [Xen-users] How to initiate a guest installation from the CD-ROM media
From: Sadique Puthen <sputhenp@xxxxxxxxxx>
Date: Thu, 06 Dec 2007 23:43:46 +0530
Cc: xen-users@xxxxxxxxxxxxxxxxxxx, Nico Kadel-Garcia <nkadel@xxxxxxxxx>, xen-users-bounces@xxxxxxxxxxxxxxxxxxx
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Ido Levy wrote:
Thank you Nico for your tip.

As per your advice I enabled the support for the CPU and now I am able to
use full Virtualization.

I have two more question that I would appreciate your advice:

1) Is there any performance differences between para and full
virtualization ?

Yes. Paravirtualization performs around 90 to 99% of bare metal hardware whereas full virtualization without para virtualized drivers can only perform upto 50 to 60% of real hardware.

2) What is better to create the virtual machine as a separate partition or
as a file ?

If performance is considered, partition or LVM. If flexibility for the guest to be mobile is concerned (Eg, through live migration) then file is preferred.

--Sadique
Thanks

Ido



Nico Kadel-Garcia <nkadel@xxxxxxxxx > To Sent by: Ido Levy/Haifa/IBM@IBMIL xen-users-bounces cc @lists.xensource. xen-users@xxxxxxxxxxxxxxxxxxx com Subject Re: [Xen-users] How to initiate a guest installation from the CD-ROM 06/12/2007 01:10 media



Ido Levy wrote:
Hello All,

I am pretty new to Xen and I would appreciate you advice on the following
issue.

I have installed Red Hat 5 Update 1 with the xen kernel and all the
required packages for virtualization support.
I reached to the point where dom0 is up and running.

Now I want to install a guest Linux OS from a customize Linux CD-ROM I
have.
I tried to use virt-install and virt-manager but the only install
location
supported is via ftp, http or NFS.

Under my restrictions the only way I have to install the required guest
is
by initiating a CD_ROM installation.

How can I do it ?


Thanks,

Ido


You need full virtualization to do a CD installation. Does your CPU
support that? If so, enable it and select full virtualization instead of
hte para-virtualization you're currently seeing.

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