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] SW RAID powered Xen node - knowledgeable feedback much

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] SW RAID powered Xen node - knowledgeable feedback much needed
From: Bart Coninckx <bart.coninckx@xxxxxxxxxx>
Date: Wed, 27 Oct 2010 20:53:20 +0200
Cc: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>, office@xxxxxxxxxxx
Delivery-date: Wed, 27 Oct 2010 11:56:11 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4CC742CC.4000001@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: <471497e549198b1771c672765c38b635@xxxxxxxxxxx> <4CC742CC.4000001@xxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: KMail/1.13.5 (Linux/2.6.34.4-0.1-desktop; KDE/4.4.4; x86_64; ; )
On Tuesday 26 October 2010 23:06:20 Jonathan Tripathy wrote:
> On 26/10/10 20:25, office@xxxxxxxxxxx wrote:
> > I would like to know your opinion on the viability of a SW RAID 1 powered
> > Xen node. The CPU is a i7-920 Quad core, 2.66Ghz, 8MB cache and 8GB of
> > RAM. The 2 HDDs are absolutely normal (no raptor, 10k-15k etc - just
> > normal SATA) and there's no HW RAID. I was thinking to allocate some 70%
> > of the resources to VEs and the rest to the node itself.
> > 
> > Can this be done reasonably?
> > 
> > Adding HW raid would mean an 60% price increase which would lead to 60%
> > more VEs on the node. Would the 60% increase in VEs count but with HW
> > RAID be preferable over the SW RAID with less VEs?
> > 
> > Thanks a lot in advance for any knowledgeable feedback.
> 
>  From personal experience, I can say that unless you are going to spend
> a lot of money on an expensive RAID controller, just go with software
> RAID. We have servers that use Linux's software RAID (mdadm) and it is
> fantastic!
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users


You have of course no goodies like battery backed up cache.

B.

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