[Libvir] libvirt: serving to web interface (swarm idea!)

Grabber grabber at gmail.com
Wed Nov 28 13:31:58 UTC 2007


And only to monitor running virtual machines?

Luiz Vitor.

On Nov 28, 2007 7:16 AM, Daniel Veillard <veillard at redhat.com> wrote:

> On Tue, Nov 27, 2007 at 07:55:25PM -0200, Grabber wrote:
> >
> >    Yeah,
> >    I'm  focused  to  develop  a decente web interface to manage Xen
> using
> >    libvirt.  I  have  some  ideas  for  the interface, can anyone help
> me
> >    saying: this is cool, this doesn't work?!
> >    The  main  idea  for migrate virtual machines is use the swarm
> concept
> >    (you can look it at:
> >    [1]http://www.jasoncoleman.net/images/Azureus_Swarm.png),  can this
> be
> >    usable?
>  Hum, I don't really see how swarming could work for migrating VM images,
> swarming works on the princimple that a lot of (network) clients are
> interested
> in large *immutable* sequence of data, so that you can spead the large
> sequence in a number of tiny sets and then use the aggregated bandwidth of
> the network crossbar to diffuse the whole sequence to the whole set of
> clients.
>  The problem is that VM state in a migration is of interest to only a
> single
> target machine, and that data sequence mutes extremely fast (see the page
> refresh algorithm of Xen live migration, it still needs a number of cycles
> and serious bandwidth to compensate live page changes).
>  So my analysis is that swarming won't help for that specific bandwidth
> need, but I might be wrong or have misunderstood your question.
> Daniel
> --
> Red Hat Virtualization group http://redhat.com/virtualization/
> Daniel Veillard      | virtualization library  http://libvirt.org/
> veillard at redhat.com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
> http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/

Luiz Vitor Martinez Cardoso [Grabber].
(11) 8187-8662

Eletrical Engineer at maua.br
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