That's a personal preference - there is not "right" answer. It depends on who
you ask. I like SUSE Linux Enterprise Server, myself, because it's stable and
well-Supported. Unfortunately SLES lags behind in terms of features and
versions, so with SLES 10 I'm still on Xen 3.2.x, and on SLES11 I'm on 3.3.x.
There are several features in 3.4.x that are very, very, nice, and that I miss
by using SLES. Fedora and openSuSE have fairly recent versions of Xen
included, and I imagine Ubuntu does, as well. Because CentOS follows the RHEL
product, Xen isn't also the most up-to-date on that platform, either.
Really, it comes down to what distribution you're comfortable with, and which
one provides versions and features that you require.
In answer to your second question, yes, an x86_64 dom0 can support 32-bit (x86)
and 64-bit (x86_64) domUs, both PV and HVM. The types of domUs you can run
does not depend on your distribution or dom0 (as long as you have the correct
tools installed), but more depends on your hardware - all hardware supports PV
guests on Xen, but HVM guests on Xen require VT support to be included and
enabled with the hardware.
-Nick
>>> On 2010/02/28 at 16:21, Paolo Rivetti <natecult@xxxxxx> wrote:
> I have to create a system based on Xen virtualization. I entrust
> myself those who have experience in the field.
> What is the preferred distribution to install Xen hypervisor? Debian,
> CentOS, Fedora, Ubuntu?
>
> Installing a distribution on x86_64 Xen hypervisor (dom0), you can
> install a PV guest with x86 architecture (domU), not HVM?
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