[libvirt-users] help about migration with libvirt

lei yang yanglei.fage at gmail.com
Tue Dec 3 16:05:33 UTC 2013


On Wed, Dec 4, 2013 at 12:00 AM, Eric Blake <eblake at redhat.com> wrote:

> On 12/03/2013 12:52 AM, Nicolas Sebrecht wrote:
>
> > This is about CPU affinity. You may look at CPU pinning with 'vcpupin'
> > in the manual of virsh. It is possible to enable vCPU pinning in libvirt
> > guest XML.
> >
> > Don't know if libvirt supports applying CPU affinity at guest runtime
>
> Yes, 'virsh vcpupin' can be used to change CPU affinity at runtime.
>
>

my case is

migrate vm from core 0 to core 1 and get the downtime
does" virsh vcpupin" work for me, and can you point me the whole step

Lei




> > but you could do it with usual tools (taskset, htop, etc).
>
> Going behind libvirt's back may lead to unexpected surprises.  Also,
> preferring the libvirt interfaces for changing CPU affinity gives you
> better flexibility of changing things even when using remote URIs (you
> don't have to open separate ssh sessions to the remote machines to run
> secondary tools).
>
> --
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>
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