Re: [Xen-users] XEN CPU ballooning?

[George Shuklin <george.shuklin@xxxxxxxxx>]

This can be done in XCP (so it can be done in xen):
xe vm-param-set uuid=... max-vcpu=X
xe vm-param-set uuid=... vcpu-at-startup=Y 
(and 1<=Y<=X)

Ð ÐÑÐ, 29/07/2010 Ð 18:52 +0100, Simon Hobson ÐÐÑÐÑ:
> Rudi Ahlers wrote:
> 
> >I'm just wondering is it possible, or planned for the new future, to
> >balloon a XEN domU's CPU cores? i.e. If I setup a domU on a Dual Quad
> >Core machine, but only assign 2 CPU cores to it now, can I add some
> >more later without rebooting?
> 
> You can remove and add processors to a running guest, and they just 
> get hotplugged - you can't go above the number configured. However, 
> I'm not aware of any means to start a guest with a different number 
> of processors to that configured in the config file. I guess you'd 
> have to knock up a simple wrapper script that would start the guest 
> and then reconfigure the processors allocated to it.



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