[CentOS] xen network io load

Pasi Kärkkäinen pasik at iki.fi
Mon Jul 16 08:05:37 UTC 2007

On Mon, Jul 16, 2007 at 09:55:15AM +0200, Tadeas Mengler wrote:
> Hello
> I have Xen related issues. I try to describe it as best as I can. 
> While transmitting large amounts of data from domU the IO load
> increases greatly, thus making the domU unusable. The load is
> significant even on dom0. The performance of cpus and hard drives is
> not an issue. We have this problem on all servers with diferent hw
> configurations. Please do you know the reason of this behaviour, do you
> have any experience whith such problems?

Nope, no such experience with many xen hosts. 

How do you measure this "IO load" ? What effects does it have? 

What kind of hardware do you have (cpu/mem/nic/disk or raid controller/disks)? 

Are you running centos5? latest updates installed? 

-- Pasi

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