RE: virtio localdisk performance

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> -----Original Message-----
> From: kvm-owner@xxxxxxxxxxxxxxx [mailto:kvm-owner@xxxxxxxxxxxxxxx] On
> Behalf Of benoit ROUSSELLE
> Sent: Donnerstag, 13. Oktober 2011 11:06
> To: kvm@xxxxxxxxxxxxxxx
> Subject: Re: virtio localdisk performance
> 
> Hello,
> 
> Can someone running with virtio tell me if this is normal to have such a
> difference with dd between host and guest machine ?
> host dd is 500MB/s
> guest dd is 150MB/s

Hi,

I just run the same test on a Proxmox VE 2.0 beta (KVM 0.15) as host and also as guest: 
(hardware: Adaptec 5805 Z with 4 x WD 500 GB RE3 in raid10)

Host 155
Guest 120 (raw file on ext3)

Do you run with the virtual disk with cache=no?

Martin

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