The two are very different systems. Xen is a hypervisor - that is, Xen is a
kernel that actually runs on the hardware, and then loads domains on top of
that. dom0, the privileged domain, helps Xen manage resource allocation to the
different unprivileged domains (domUs), but dom0 is running on top of Xen the
same way that the domUs run on top of Xen. KVM is a Linux kernel
virtualization infrastructure, and runs inside the Linux kernel (not underneath
it). That's a pretty basic explanation, and I'm sure I'm not quite accurate on
it and that some of the other, more knowledgeable folks around here would have
better explanations. Both Xen and KVM use Qemu for the interface to the
virtual machines (domains), so feature set it going to be pretty similar
between the two as far as what kind of hardware you can present, etc.
However, the point still stands: determining which one is "better" is something
that most likely depends on what you're trying to do.
-Nick
>>> On 2010/04/21 at 15:08, Arpan Jindal <jindalarpan@xxxxxxxxx> wrote:
> I have been using Xen on RHEL from last 3+ years but today i was seeing some
> one using KVM on RHEL and, that lead me to ask all which one is better and
> how .
>
> so basically i mean to ask what features xen does have over KVM if any or
> both same ?
>
>
>
> On Thu, Apr 22, 2010 at 2:20 AM, Nick Couchman <Nick.Couchman@xxxxxxxxx>wrote:
>
>> That depends on who you ask and what you're doing. You're asking that
>> question on a Xen mailing list, so I'd venture a guest that most of us here
>> (yes, us, as in, me too) are going to feel that Xen is a better choice.
>>
>> What are you trying to accomplish in terms of virutalization?
>>
>> -Nick
>>
>> >>> On 2010/04/21 at 11:20, Arpan Jindal <jindalarpan@xxxxxxxxx> wrote:
>> > Hello all
>> >
>> > needed your views and review on which one is better on RHEL xen or kvm ?
>>
>>
>>
>>
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