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

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(a)redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/ http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/