Re: [libvirt-users] network-performance
On 2/1/2011 12:39 PM, Orion Poplawski wrote:
I'm just starting to take a look at guest networking performance
and am
a little disappointed. I'm comparing two setups:
Host: Windows Server 2008 R2 Hyper-V
Guest: CentOS 5.5 x86_64
Host: CentOS 5.5 x86_64 kvm running libvirt
Guest: CentOS 5.5 x86_64
The guests are essentially identical except that I'm running the
Microsoft Linux Integration Components synthetic drivers on the windows
hosted VM. The libvirt setup uses bridged networking. Running bonnie++
on a nfs mounted filesystem on each guest I'm seeing the libvirt hosted
guest get between 16%-35% of the performance of the Hyper-V guest. Is
this expected? Is there anything I can do to increase network
performance of the kvm guest?
First thing is to stop unfairly comparing things that don't even claim
to do the same job. hyper-v is a hypervisor, while kvm is not, xen is.
It would be closer but still unfair, to compare qemu or virtualbox for
windows to kvm.
You didn't say what kind of networking is being used wth hyper-v, but
it's an understood fact that bridgeing in linux is easy to use and less
efficient than routing or vlan or macvlan.
So I guess the answer is use xen and something other than bridging.
--
bkw