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Re: [Xen-devel] Xen CPU limit?

On Tue, Mar 30, 2010 at 10:32:29AM +0100, Martin Lukasik wrote:
> Pasi Kärkkäinen wrote:
>> Why do you need to have all the cores visible to dom0? 
>> It's usually enough to have a couple of cores for dom0, and the rest 
>> free/available in Xen hypervisor for other guests.
> I read three books about Xen, but surely they weren't a good read. Many  
> things haven't been even mentioned (btw: can anyone recommend a *good*  
> book on Xen?)
> I thought that the way it works is: you set up Dom0 with max number of  
> CPUs and then allocate them to VMs.
> But since Dom0 is a VM as Keir said, then it all must be up to a hypervisor.
> So I need a hypervisor to support 48 cores, then set up Dom0 with let's  
> say 2 vCPUs and 1GB of RAM, and create other VMs according to my  
> requirements.
> Am I right?

Yes, that's correct. 

See here for some tips: http://wiki.xensource.com/xenwiki/XenBestPractices

-- Pasi

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