Re: [Xen-users] Xen or KVM

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Wed, May 16, 2012 at 5:10 PM, Fajar A. Nugraha <list@xxxxxxxxx> wrote:
> On Wed, May 16, 2012 at 5:04 PM, Arindam Choudhury <arindam@xxxxxxxx> wrote:
>>
>>
>>> From: fbcyborg@xxxxxxxxx
>>> Date: Wed, 16 May 2012 11:56:31 +0200
>>> Subject: Re: [Xen-users] Xen or KVM
>>> To: arindam@xxxxxxxx
>>> CC: xen-users@xxxxxxxxxxxxx
>>>
>>> On 16 May 2012 11:49, Arindam Choudhury <arindam@xxxxxxxx> wrote:
>>> > Hi,
>>> >
>>> > I am new to virtualization and I am having the obvious hassle of
>>> > choosing
>>> > between Xen and KVM.
>>> Hi,
>>>
>>> it depends on how much time you have. I prefer XEN, absolutely, but if you
>>> hurry and you are not patient, KVM could be a valid alternative.
>>> Of course if you ask here this question, it is unlikely to find people
>>> suggesting
>>> KVM instead of XEN ;-)
>>
>> The question is why you personally like Xen? What benefits you getting over
>> KVM?
>
> It used to be that Xen PV delivers superior I/O performance. So we've
> used it extensively with RHEL5 dom0 and its bundled version of xen
> (xen 3.1.2+, kernel 2.6.18.x). However depending on how you test it,
> recent version of xen actually suffer from reduced performance
> compared to older version (search list archive for details).
>
> My personal benchmark (two years ago, I think) using mysql+sysbench
> and fio, comparing RHEL5+xen, RHEL6+kvm, and vmware, pretty much shows
> the same result though. That's why I said use whatever you're
> comfortable with.

Just to be clear, by "the same result" here I mean the performance of
the three setup is roughly the same, the difference is not
statistically significant.

-- 
Fajar

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