RE: [Xen-users] XEN hypervisor on USB disk

[Jan Češčut <Jan.Cescut@xxxxxx>]

If I passthrough the disk controller to DomU (running FreeNAS) and then try to 
share the iSCSI LUNs over virtual network to other DomUs that are running in 
paravirtual mode, the performance penalty shouldn't be a concern - baised on 
different I/O benchmarks that I checked on internet (between two HVM guests 
with installed Xen network drivers and between two PV guests - which performed 
excellent). I would also like to run a single HVM guest (Windows 2003) which 
will have it's LUNs shared over dedicated network card that will be 
passed-through (one in FreeNAS and the other in HVM guest Win2003).
Of course if I'm not mistaken. :)

Have a nice day,
Jan

-----Original Message-----
From: Fajar A. Nugraha [mailto:fajar@xxxxxxxxx]
Sent: 10. maj 2010 6:55
To: Jan Češčut
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] XEN hypervisor on USB disk

2010/5/8 Jan Češčut <Jan.Cescut@xxxxxx>:
> Hi!
>
>
>
> Is it possible to run XEN hypervisor from USB disk (connected to the usb
> controller)? Let me be more specific... I would like to run dom0 from USB
> disk and with the help of PCI passthrough, asign  the integrated hard disk
> controller to a specific DomU.


Should be possible, as long as whatever dom0 you use supports
installing to USB disk.

>
> The PV guest would run Openfiller or FreeNAS – what would make it a SAN
> server. Other PV guests running on the same machine would use the shared
> LUNs of the SAN server.
>
> That's the plan, is it doable?

Before deploying it in production, you should test its performance
first. Having a domU handle all I/Os for other domUs (via iscsi/nfs?)
might incure performance penalties. Make sure the performance is
acceptable for your needs.

--
Fajar

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