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RE: [Xen-users] iSCSI Volumes and Xen

To: "Simon Hobson" <linux@xxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] iSCSI Volumes and Xen
From: Jeff Sturm <jeff.sturm@xxxxxxxxxx>
Date: Wed, 13 Jan 2010 11:41:21 -0500
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-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Simon Hobson
Sent: Wednesday, January 13, 2010 11:11 AM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] iSCSI Volumes and Xen

> Pasi Kärkkäinen wrote:

>>And you don't necessarily need a filesystem at all.
>>You could just use Cluster LVM (CLVM) to store the guest disks.

>I thought that would let you share an LVM volume 
>across machines, but not take care of the 
>filesystem itself. So you still need a cluster 
>aware filesystem to run on top of the CLVM volume.

CLVM allows you to share the entire volume group, so individual hosts can carve 
out logical volumes at will for their own storage.

Individual logical volumes may or may not be shared within a clustered volume 
group, depending on your needs.  If shared, clustered filesystems are still 
required.  If not, ext3 (or whatever) is fine.

-Jeff



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