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RE: [Xen-users] Running network services on Dom0

To: <xen-users@xxxxxxxxxxxxxxxxxxx>, <tomlobato@xxxxxxxxx>
Subject: RE: [Xen-users] Running network services on Dom0
From: "Artur Linhart - Linux communication" <AL.LINUX@xxxxxxxxxxx>
Date: Fri, 7 Dec 2007 20:08:36 +0100
Cc: 'marcus' <marcus@xxxxxxxxxx>
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        If You want really to deliver the best performace, is it the issue
to pay some hundreds of USD for the PV Windows drivers? I think this could
be not so huge invest if somebody really wants to get the best

        How heavy load do You plan to have on Windows machines, which kind
of services do You want to have there? 

        Also I have to note - there is a significant difference between the
DomU started from the file and started from the block device, especially if
You have no problem to dedicate a direct physical device to the DomU and not
need the flexibility of LVM...

        We have some ORACLE servers runing on Windows in DomUs with w2k
32bit and w2k3 64bit, there is a small count of the clients but make really
performance-intensive operations on the oracle servers, the servers are
running together with other instances and this is at least OK for us... At
least if You can arrange it so the virtual servers do not share the same
physical disk..

        With best regards


-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of marcus
Sent: Wednesday, December 05, 2007 5:24 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Running network services on Dom0

Tom Lobato schrieb:
> Hello Sadique,
> ok, I understand the security motivation.
> With Linux really has no problem in running as domU, but I made some
> tests with win2003 on xen and noted that free vmware server is faster.
> So, I'm thinking about use vmware. I really would like to use Xen,
> because it is real free software and I like so, but I must to deliver
> best performance to my customer.
> I read about virtualization and para-virtualization. As I understood,
> the full virtualization that Xen does with Windows is not yet so fast,
> because it lacks free PV drivers. Is there any optimization to try? I'm
> already running win2003 on a separate partition (/dev/sda6, a sata raid1
> device). I use debian etch and xen 3.0 from debian repositories.
> Thank you!
> Tom Lobato
> Sadique Puthen escreveu:
>> Tom Lobato wrote:
>>>    Is it a good way to run common network services on dom0 
>>> (proxy-cache, dababase), beyond manage domU's ?
>> As far as security is concerned,  NO. Have them on domus
>> --Sadique
>>>    Tom Lobato
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

I think there is no optimazation method available for using windows with 
xen. The only thing which i heard is, that microsoft will do something 
for xen users. But I dont know when or what the consequences of the 
project will be. Maybe special windows versions or only some 
drivers..goodness knows :).


Marcus Herz
Max-Planck-Institute for the physics of complex systems

Nöthnitzer Straße 38
01187 Dresden

Tel:  0351 / 871 2104
Fax:  0351 / 871 1999
Mail: marcus@xxxxxxxxxxxxxxxxxxxxx

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