Xen users - May 2012 - SAN high available best practices

I am finally getting around to setting up our Dell MD3200i iSCSI SAN to 
be the disk storage for our xen dom0''s so that we can utilize HA 
functions. Each of our dom0 host machines have 4 NIC''s. So far I have 2
NIC''s bonded as a mode6 for trunk/vlan traffic and the other two
NIC''s
setup to access the SAN directly. My main question is this though: How 
should I handle the LUN''s and access to the various dom0''s? We
use lvm
based disks for domu''s for performance and snapshot features. Should I 
create individual lv''s for each disk or create one large vg and then 
create the individual lv''s? As you can tell I have never done this part
before so any good guides online I could read would be great. We do want 
to use xen''s HA functions so if a physical host has problems the
domu''s
on that host can fail over to the other node without interruption. This 
is possible right? Unlike others where it stops the domu and then starts 
it on the other dom0 causing downtime.

Thanks in advance for any and all input.

Donny B.

On 05/03/2012 08:03 AM, Donny Brooks wrote:
> I am finally getting around to setting up our Dell MD3200i iSCSI SAN 
> to be the disk storage for our xen dom0''s so that we can utilize
HA
> functions. Each of our dom0 host machines have 4 NIC''s. So far I
have
> 2 NIC''s bonded as a mode6 for trunk/vlan traffic and the other two
> NIC''s setup to access the SAN directly. My main question is this 
> though: How should I handle the LUN''s and access to the various 
> dom0''s? We use lvm based disks for domu''s for performance
and snapshot
> features. Should I create individual lv''s for each disk or create
one
> large vg and then create the individual lv''s? As you can tell I
have
> never done this part before so any good guides online I could read 
> would be great. We do want to use xen''s HA functions so if a
physical
> host has problems the domu''s on that host can fail over to the
other
> node without interruption. This is possible right? Unlike others where 
> it stops the domu and then starts it on the other dom0 causing downtime.
>
> Thanks in advance for any and all input.
>
> Donny B.
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xen.org
> http://lists.xen.org/xen-users
Forgot to mention that we will have both HVM and PV domu''s on these 
servers. Didn''t know if that made a difference.

Donny B.