Re: [Xen-users] How many guests

[Jonathan Tripathy <jonnyt@xxxxxxxxxxx>]

Hi Michael,

Thanks for your email.

This is just an idea that I have floating around in my head that maybe 
I'd like to rent out some VPSs to customers, just to utilise my machine 
which will be sitting in a co-lo nearly idle.
I'd give out VPSs with 256MB RAM and probably 5Mbps connection speed.

So the answer is, I don't know what will be running on them, however I 
could write up an "acceptable use policy", as well as use some 
throttling/scheduling?
Thanks

On 06/06/10 19:39, Michael Schmidt wrote:
> Hi Jonathan,
>
> the question is, what a kind of VM?
> You can over-utilize a much greater machine with one VM.
> Or on the other side, you can run 40 VMs on a shorter machine.
>
> Each ressource can be a bottleneck
>
> - Memory - this is realy easy to calculate: Avaiable minus 768MB 
> (Reserved for Dom0 should be enugh in this case).
> - CPU - Here we need a VM statistic
> - Disk Bandwidth - Here we need a VM statistic, but in the most cases 
> not the bottleneck
> - Disk IOPS - Here we need a VM statistic, in the most cases the 
> botelneck
> What a kind of VMs you plane to run?
> Webservers / mailservers / database-servers ...?
>
> Best Regards
>
> Michael Schmidt
>
>
> Am 06.06.10 00:54, schrieb Jonathan Tripathy:
> > Hi Everyone,
> >
> > I have a Dell R210 server which has a Xeon X3430 Quad Core CPU 
> > (2.4Ghz x 4) with 8GB of RAM. I intend to use the H200 controller in 
> > a RAID1 setup
> > How many VMs do you think I'd be able to run on this machine? Is 20 
> > pushing it?
> > I'd say most (if not all) guests would be in PV mode.
> >
> > Thanks
> >
> > _______________________________________________
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> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
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