Re: [Xen-users] Dell 2950 III for Xen virtualization

["Nick Jones" <nicholas-jones@xxxxxxxxx>]

Hi Fabio,

I've been told that 1 GB per VM is a good rule of thumb.  It seems
that you are following this guideline.   I guess I'm interested in
first hand experience attempting to use xen as a sort of terminal
server.  Since the resources can be managed pretty effectively I don't
see a problem with this approach other than a need for lots of RAM and
a good number of CPU cores.

What I really need to know is what happens when I run 30 VM's under
this kind of setup.  Each VM will be XP and a typical web browsing
scenario in terms of compute resources, nothing else.  I guess I'd
like to know if 30 VM's is unreasonable, impossible, or not a problem
at all.


Hi Nathan,

As far as just using a terminal server, I would need Windows Terminal
Server to be able to run windows based applications (this is a
requirement).  The cost and complexity of licensing seems prohibitive
and not worth the reduced complexity of management, if such a thing
exists with terminal server compared to xen.  I'm sure that learning
curve aside, xen is pretty straightforward to manage once it's up an
running.  That said, to answer your question, no I have not really
looked into terminal server that much but I'm interested to hear about
the advantages over xen for my particular situation (cost is a big
consideration for us).

Thanks for the responses.

Nick




On Mon, Aug 25, 2008 at 12:52 PM, "Fábio M. Catunda"
<fcatunda@xxxxxxxxxxxxxxxxx> wrote:
> Nick,
>
> I have a 2950 running Xen very well. I don't have SAS disks, just 800GB SATA
> ones, but everything is running well until now.
>
> I have only 4GB RAM memory, but thats ok for only 5 VMs.
>
> My instalation is a tipical Debian setup, nothing special.
>
> By now I have this running:
> vm1debian                                 11      256     1 -b----   6555.8
> vm2debian                                 12      128     1 -b----   5096.7
> vm4debian                                 14      256     1 -b----   5973.8
> vm5centos                                 15      512     1 -b----   5757.4
> win02                                     16      512     1 -b----  30637.5
>
> If you want to know something specific, just ask.
>
> Regards,
>
> Fábio Catunda.





> Have you considered just using a terminal server, to reduce complexity?
>
> Thank you,
> Nathan Eisenberg
> Sr. Systems Administrator
> Atlas Networks, LLC

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