JOLLANS: I think a lot of this is about the community and about the ecosystem. If Xen diverts into multiple code bases then you don't get the same sort of community effects here. With KVM, along with SUSE and Intel and HP and Red Hat and a number of others, we put together a couple of groups recently: the Open Virtualization Alliance, which is looking at how do you educate the market about KVM, and more recently oVirt, which is about getting virtualization management to a common code base as well. So if you can hold the communities together and develop a single code base, then I think long term you've got a much better future than if it diverges into several code bases.

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