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] SMP, Win 2k3 R2 Server, and GPLPV

To: "Mike Williams" <mike@xxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] SMP, Win 2k3 R2 Server, and GPLPV
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Thu, 8 Jan 2009 08:57:01 +1100
Cc:
Delivery-date: Wed, 07 Jan 2009 13:58:52 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <200901071404.30655.mike@xxxxxxxxxxx>
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/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <49637931.87A6.0099.1@xxxxxxxxx><AEC6C66638C05B468B556EA548C1A77D01550212@trantor> <200901071404.30655.mike@xxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Aclw0Qjhp0wP3SsqQw6Cg49lhymhjQAQb5PQ
Thread-topic: [Xen-users] SMP, Win 2k3 R2 Server, and GPLPV
> 
> On Tuesday 06 January 2009 22:58:18 James Harper wrote:
> > E200+file:+GPLPV = 320MB/min but the Dom0 would freeze after about
8GB
> > restored and the restore would fail
> >
> > E200+tap:aio+GPLPV = 12MB/min. This would probably run to completion
but
> > I wasn't going to wait
> >
> > E200+file:+qemu = 270MB/min and restored to completion
> >
> > SW RAID+tap:aio+GPLPV = 620MB/min (and everything remains responsive
the
> > entire time)
> 
> Very interesting numbers there James.
> I'm a RAID10 man myself, but there is some chunk alignment issue with
Xen,
> HVM guests (possible just windows, I didn't try), and LVM, or
something.
> 
> > Obviously something was wrong somewhere for the E200 to perform that
> > badly, but don't underestimate the performance of software raid,
> > especially RAID1 (I wouldn't recommend RAID[56] to anyone who cares
> > about performance, be it hardware or software RAID).
> 
> Heh, I've just built this new machine with RAID6 :)
> Your 620MB/min test, was that tap:aio on a file, or lvm, or ...? Might
go
> back to RAID10 and skip the LVs instead, I won't ever resize these
images.

tap:aio + lvm + RAID1

James

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