On 07/28/2011 11:49 AM, Juergen Gotteswinter wrote:
> Am 28.07.11 11:23, schrieb Peter Peltonen:
>> Hi,
>>
>> A few more questions :)
>>
>> On Thu, Jul 28, 2011 at 11:56 AM, John R. Dennison<jrd@xxxxxxxxxxxx> wrote:
>>> On Thu, Jul 28, 2011 at 10:53:23AM +0200, Juergen Gotteswinter wrote:
>>>>
>>>> i think i am not the only one who wants to stay with with xen :)
>>>
>>> Far from it. Xen still has a place as a dom0.
>>
>> What are the reasons for people staying with Xen as dom0, just the
>> learning curve? Or are there some technical considerations as well?
>>
>> Are there any good migration guides from xen to KVM?
>>
>> Can xen domUs be used with KVM easily?
>>
>> I am myself wondering should I learn KVM and go with C6 dom0 or to
>> stick with C5 for now...
>>
>> BR,
>> Peter
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>
> my experiences with KVM
>
> - overcomittmend possible -> very bad in lots of producation systems
How is the *possibility* of overcomittment a bad thing. It gives you
additional options. In many situation it *is* a good idea and KVM giving
you the option should be a pro not a con. Nobody forces you to overcommit.
> - vms run as qemu process which take often lots of more memory then
> assigned to the vm, which could result in swapping (qemu overhead? dunno...)
Define "lots of more memory". Are you sure you are not looking at virtual
memory and/or buffers?
> - performance Issues, espacially io
Citations needed.
> - cli tools arent as easy to use than xm / xl
If you use libvirt then you can keep using the same tools that you used for
xen. The fact that the old tools seem to be easier to use i often a result
of familiarity and not necessarily an indicator that the new tools are
objectively worse.
I don't have any KVM guest in production yet but I've tested with both
Linux and Windows 2008 guests and so far I hardly see any difference to my
Xen guests.
Regards,
Dennis
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