WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Disk performance on HVM domains

To: Marc Patino Gómez <mpatino@xxxxxxxxxxxx>
Subject: Re: [Xen-users] Disk performance on HVM domains
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 1 Oct 2007 18:13:24 +0300
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Mon, 01 Oct 2007 08:14:12 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <4700DE99.8070805@xxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <4700DE99.8070805@xxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.13 (2006-08-11)
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

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>