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Re: [Xen-users] who comes from kvm?

To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] who comes from kvm?
From: Mauro <mrsanna1@xxxxxxxxx>
Date: Fri, 11 Feb 2011 08:09:41 +0000
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On 10 February 2011 22:42, Steven Timm <timm@xxxxxxxx> wrote:
> On Thu, 10 Feb 2011, Mauro wrote:
>> There is someone that switched from kvm to xen?
>> If yes what are the motivations?
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-users
> I run a lot of both.
> In my production servers I have a multi-master mysql database
> of fairly small size (a few MB) that runs on Xen and
> has run fine for years.
> I tried to clone this setup in the cloud on KVM.  The same
> load from the web frontent, KVM load spikes to 67 and DB freezes
> up.  Xen in the cloud runs at load of 5 or 6, quite acceptable.
> KVM as shipped with RHEL6 is supposed to be better but I haven't tried
> it yet.  But where KVM seems to fall down the most is on complex
> heavy disk I/O tasks.  If it is just block read and writes
> things are fine.  KVM is also not very good as a Lustre server.
> (but it is impossible to run Lustre servers on Xen at all due
> to incompatible kernel patching.)

I've used xen for years and I like it, but the fact that it's not
included in linux kernel makes me doubt whether it can be supported
for a long time.
Here is a similar discussion on kvm list:


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