Re: [Xen-users] Shared Storage

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

Agreed, that's how we do it as well. One LUN for one host. In HA 
situations still no issue, as long as you use clustering software to 
determine which Hypervisor uses the DomU.
B.


On 04/24/11 20:13, Jonathan Dye wrote:
> Why not create one iscsi lun per vm disk instead of carving them up on the 
> hypervisor?  That's more typical, and a more typical state of affairs in linux 
> is your friend.  Also, you would have just one lun queue if you exported one 
> big PV, instead of one lun queue per vbd. That becomes a problem at scale.
>
> - Jonathan
>
> ----- Original Message -----
> From: "Jonathan Tripathy"<jonnyt@xxxxxxxxxxx>
> To: "Xen List"<xen-users@xxxxxxxxxxxxxxxxxxx>
> Sent: Sunday, April 24, 2011 11:25:38 AM
> Subject: [Xen-users] Shared Storage
>
> Hi Everyone,
>
> I am consider such a setup where I export an iSCSI target to a Xen node.
> This Xen node will then use the iSCSI block device as an LVM PV, and
> create lots of LVs for DomU use.
>
> I was wondering if anyone could make me aware of any special
> consideration I would need to take. I've posted a similar question to
> the LVM list to ask for further tips more specific to LVM.
>
> Am I barking down the wrong path here? I know it would be very easy to
> just an NFS server and use image files, but this will be for a large
> scale DomU hosting so this isn't really an option. Additionally, if I
> wanted to make the LVM VG visible to multiple Xen nodes, is it just a
> matter of running CLVM on each Xen node? Please keep in mind that only
> one Xen node will be using an LV at any one time (so no need for GFS, I
> believe)
>
> Any help or tips would be appreciated
>
> Thanks
>
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