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] Live migration problem

To: "Pim van Riezen" <pi@xxxxxxxxxxxx>
Subject: Re: [Xen-users] Live migration problem
From: "Todd Deshane" <deshantm@xxxxxxxxx>
Date: Sat, 19 Jan 2008 01:23:47 -0500
Cc: Alain BARTHE <alain.barthe@xxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 18 Jan 2008 22:24:29 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:references; bh=CQC9u43Y+fF86ERiX/DhSZkgqS4YRKXPgGhA3YlTB+0=; b=Gp95T1BvLNYPhwYx9BMJDjAkUBZj7kIYdQlWgxHDfEgy60Hz48urO8HXHZg1RnEHf5k5LP7G6GnV4PEwZli78c6SwBuprb8j2/i0MZrxsNpTqc3jH2e43N8noUjvGPI3f/1OF/DIybjrIOJyg1s6tam6Cb6vkGfQpk5M0S71Vzw=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:references; b=KF1lEJwlT18uptsmR5GaREYRUEPc/UiZjwzDmYTLtJAzBqT4/OM66Q0PY90DGbxBSX3CTyP56mjkn7DDBHa+Ty5zG8mTBYacBtztLo+uZdK5w16r9MJiym9sjerLvQk/3RoMLDC2T1jjW/yJVBupn9giF18tRrpjr3dbd4/374U=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <91DAA5D7-22D3-4E26-ABBC-47956BA6FDC7@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: <OF01B9E778.F999E8E8-ONC12573CC.003505F6-C12573CC.00366057@xxxxxxxxx> <91DAA5D7-22D3-4E26-ABBC-47956BA6FDC7@xxxxxxxxxxxx>
Reply-to: deshantm@xxxxxxxxx
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx


On Jan 10, 2008 10:33 AM, Pim van Riezen <pi@xxxxxxxxxxxx> wrote:

On Jan 10, 2008, at 10:53 , Alain BARTHE wrote:

>
> Hi,
>
> We have a dozen of dom0, running about 50 domUs. All domUs have
> disks on LVM, disks are located on a SAN, so it is very easy to live
> migrate simply by attaching a domU disk on two dom0s.
>
> All dom0s run CentOS50 with Xen 3.0.3.
>
> We tried many time to migrate in vitro some little domUs and it
> worked perfectly.
>
> Now we really need to migrate a big domU (big by its RAM: 3.6 GB)
> and we have the following error (log on the from dom0):

Your problem is probably that live migration requires Xen to create a
shadow copy of the active RAM of your DomU, so you effectively need to
have RAM(DomU) free on the source and 2*RAM(DomU) on the target Dom0.

It shouldn't be 2*RAM. From what I have read, the amount of memory needed equals the amount of memory allotted to the guest on the source host plus an additional 8MB of temporary storage .
 
I don't yet have a guess as to why it is actually failing though.


Cheers,
Pi


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

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