KVM vs Xen/OpenVZ for VPS hosting business

[howard chen]

Hello,

Currently both Xen and OpenVZ are well known and mature product used
in hosting companies.

How about KVM? What are the advantages if I use KVM as the VPS solution?

E.g.

performance?
security?
maintainity?


I am not familar with KVM so want to know your opinion.

Thanks.
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Paravirtualisation or not?

[howard chen]

Hey,

I am comparing Xen and KVM to see which one is suitable for me usage.


From the FAQ: 
http://www.linux-kvm.org/page/FAQ#What_is_the_difference_between_kvm_and_Xen.3F

It said:

 kvm does not support paravirtualization for cpu but may support 
 paravirtualization for device drivers to improve I/O performances.


Do does it mean using paravirtualization is good? So Xen is faster if
we can are running modified OS which support paravirtualization?


In fact, we have tried Xen, running CentOS 5.0 on latest Intel Quad
core CPU. Performance is not bad, but already have interest in try
other solutions.
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Re: Paravirtualisation or not?

[howard chen]

On Mon, May 4, 2009 at 10:44 PM, Pasi Kärkkäinen pa...@iki.fi wrote:
 On Mon, May 04, 2009 at 10:40:00PM +0800, howard chen wrote:
 Yes, paravirtualization is good. If running KVM, use paravirtualized network
 and disk/block drivers for better performance.

So does it mean generally Xen is more optimized than KVM for speed?

Thanks.
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