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Date: Thu, 10 Jan 2013 08:49:21 -0800
From: Kraig Amador <kamador@shopzilla.com>
To: "=?utf-8?Q?cloudstack-users=40incubator.apache.org?="
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Subject: Re: best supported hypervisor
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One more opinion on the topic, 

We have been using KVM for a few months now but we are noticing some severe disk io performance issues that we have been unable to tune our way out of. We have tested Xen and seen 5x improvements on the same hardware. I've spoken to other people who have had the same problem when using local disk on KVM, so its something you should look out for if disk performance is a concern.

It is so drastic for us that we are considering rebuilding all of our 50+ VM hosts on Xen. 

-- 
Kraig Amador


On Thursday, January 10, 2013 at 5:22 AM, Alex Huang wrote:

> Nux,
> 
> I would say XenServer is the best supported hypervisor with KVM rapidly catching up. This is mainly because I've known quite a few XS production deployments. 
> 
> You'll find a lot of community members are on KVM and since it's been open to apache, there's been a lot of contribution in KVM in terms of bringing it up to date with the latest Ubuntu release etc and software features. I think if you're looking for the latest advances in technology, KVM is probably even earlier than XS. 
> 
> I don't think you'll go wrong with either hypervisor.
> 
> As for SDN in your other thread, I will let Hugo speak to Nicira's readiness. There's also a desire to bring OVS to production level in the near future.
> 
> --Alex
> 
> > -----Original Message-----
> > From: Nux! [mailto:nux@li.nux.ro]
> > Sent: Thursday, January 10, 2013 1:44 AM
> > To: cloudstack-users@incubator.apache.org (mailto:cloudstack-users@incubator.apache.org)
> > Subject: Re: best supported hypervisor
> > 
> > On 10.01.2013 03:50, Mathias Mullins wrote:
> > > Nux,
> > > 
> > > What your use case? Are you trying a pay for hypervisor, or
> > > OpenSource? What are the top 5 features you are looking for?
> > > 
> > > That makes a difference in the question.
> > > 
> > > Matt
> > 
> > Hello Mathias,
> > 
> > I prefer open source, kvm+libvirt whenever possible; I have worked with
> > xen/xenserver before though and I could give it a try once again if it
> > checks all the boxes.
> > 
> > At the end of the day I want a solution that is reliable; to be honest
> > I almost went with Openstack in production, but there're some
> > show-stoppers for me, like 1:1 NAT which simply does not work for
> > everyone no matter how excited they get about it.
> > 
> > So what I'm hoping from cloudstack is:
> > - able to assign public IPs to VMs
> > - not trap me in the 4094 vlan limit (hence the need for gre or smth
> > else)
> > - ipv6 (i understand this is coming in 4.1)
> > - decent upgradability, so next `yum update` won't make the wheels fall
> > off
> > 
> > Of course, now that I've been reading/watching stuff about Cloudstack I
> > discovered all sorts of nice stuff that I want, like multiple types of
> > primary storage etc.
> > 
> > Any pointers?
> > 
> > --
> > Sent from the Delta quadrant using Borg technology!
> > 
> > Nux!
> > www.nux.ro (http://www.nux.ro)
> > 
> 
> 
> 


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