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Re: [Xen-users] Xen version for production environment.

To: Grant McWilliams <grantmasterflash@xxxxxxxxx>
Subject: Re: [Xen-users] Xen version for production environment.
From: Bruce Edge <bruce.edge@xxxxxxxxx>
Date: Wed, 25 Aug 2010 11:40:17 -0700
Cc: Jeff Sturm <jeff.sturm@xxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx, "Ronaldo C. A. Chaves" <xarqui@xxxxxxxxx>
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On Wed, Aug 25, 2010 at 11:02 AM, Grant McWilliams <grantmasterflash@xxxxxxxxx> wrote:
On Wed, Aug 25, 2010 at 10:18 AM, Jeff Sturm <jeff.sturm@xxxxxxxxxx> wrote:
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ronaldo C.
A. Chaves
> Sent: Wednesday, August 25, 2010 9:30 AM
> To: Fajar A. Nugraha
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Xen version for production environment.

> But if I want to use Debian Lenny with Xen 4.0.0 and kernel 2.6.18-8
would be a good choice for a production environment?

For my .02, I wouldn't try it.  Pick a dom0 known to work--RHEL, CentOS,
XCP, XenServer--whichever--then run whatever you want as a domU.

Avoid the hassle of trying to match up dom0 with your favorite Linux
distribution.  If Debian supports Xen on dom0 and tells you it works, go
for it--but the last I looked, the Debian folks aren't trying hard to
support Xen as a dom0.


Agreed. People get all wound up about Dom0 but how many Dom0's do you have in relation to DomU's? You won't spend much time "managing" your Dom0.
The XCP manual actually says to leave it alone and don't install extra software or change anything. You bring it up, keep it secure and just leave it alone.
You can run anything as a DomU which is the OS you'll be using the most.

Grant McWilliams

While this is true for the majority of cases, that is IT server consolidation, it's not for embedded systems. It's not uncommon now for developers to use Xen as a means of consolidating multiple symbiotic platforms into one chassis and slapping a new badge on it with a single pane of glass UI for the customer. In fact we're developing a Windows/debian box that combines a number of services that all looks like one system to the user. 
This requires that we have drivers on dom0 for chassis mgmt and other supervisory services. In this case, it seems that one does need to concern oneself with impedance matching between dom0 Linux version and Xen, as the dom0 is an integrated component of the overall system.
Not that this affects the recommendations made to the original poster, but I wanted to speak up for the embedded developers that have a completely different view of what Xen is for and how it's used.

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