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xen-users
Re: [Xen-users] Disk performance on HVM domains
On Mon, Oct 01, 2007 at 01:48:41PM +0200, Marc Patino Gómez wrote:
> Hi list,
>
> I converted one old FreeBSD 4.9 box to HVM domU (with AMD-V processors,
> with Intel-VT doesn't work). All works fine, but disk performance is too
> poor... about 8MB/s (in dom0 i get about 40MB/s). I did some test with
> VBD with file backed and LVM but performance stills poor.
>
> Any advices?
>
> Is possible to use blktap in this case? Any pointers?
>
> If I use a SAN, network performance on HVM will be a problem?
>
> What's about tgt?
>
> I have one HVM old linux 2.4 domU and I can get far more disk troughtput
> than with FreeBSD, it is normal? In this case, domU is on Intel-VT Xen
> server, is Intel-VT io implementation better than AMD?
>
> At now, I'm only testing, in the future I will need to virtualize some
> old FreeBSD servers with quite great IO demand
>
You need to install PV (paravirtual) xen aware device drivers into FreeBSD..
I don't know if there is such thing..
-- Pasi
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