> -----Original Message-----
> From: Wido den Hollander [mailto:w...@widodh.nl]
> Sent: Friday, August 09, 2013 2:41 AM
> To: dev@cloudstack.apache.org
> Subject: Re: [DISCUSS] KVM io throttling
>
>
>
> On 08/09/2013 02:05 AM, Edison Su wrote:
> > Hi All,
> > For basic network, the io limit for guest network(nic 2) is 200MB/s,
> > we
> set the io limit on kvm host as:
> >
>
> I think you mean 200Mbit/s?
Oh, I see, it's 200Mb/s.
>
> > </interface>
> > <interface type='bridge'>
> > <source bridge='cloudbr0'/>
> > <mac address='06:45:c4:00:00:0c'/>
> > <model type='virtio'/>
> > <bandwidth>
> > <inbound average='25600' peak='25600'/> <outbound average='25600'
> > peak='25600'/> </bandwidth> </interface>
> >
> >
> > From libvirt doc(http://libvirt.org/formatnetwork.html), it says above unit
> is KB/s, but per my testing, it sounds like it's Kb/s. Is there anybody have
> the
> same issue?
> >
>
> No, my testing tells me it's is KB/sec (KiloByte).
On centos 6.3 + libvirt 0.9.10, the number doesn't match:
With the following simple test:
dd if=/dev/zero of=some-nfs-mount-point bs=1M count=10
I can get 104 MB/s if nic2 speed is unlimited, while only get 1MB/s, if nic2 is
configured with
<bandwidth>
<inbound average='25600' peak='25600'/>
<outbound average='25600' peak='25600'/>
</bandwidth>
Maybe it's an issue on Centos 6.3?
>
> > My libvirt version is 0.9.10 on Centos 6.3.
> >
>
> My libvirt version is 1.0.6 under Ubuntu 12.04 using the Cloud Archive for
> OpenStack Havana from Canonical:
> https://wiki.ubuntu.com/ServerTeam/CloudArchive
>
> Wido
