Re: [Xen-users] LVM over FC-San poor performance

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Tue, Apr 19, 2011 at 3:26 PM, Mice <mice1982@xxxxxxxxx> wrote:
> All VMs are HVM.

>
> when dd the lv from dom0, the performance is acceptable, range from 150 ~
> 300MB/s
> but when dd the local disk in guestOS (centOS 5.5 domU), the peformance is
> poor, about 40MB/s
>
> my question is, is this normal? if not, any clues for performance tuning?

AFAIK it is. That's the consequence of using HVM.

I suggest you try with PV domU and see how it goes.

-- 
Fajar

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