Re: [Xen-users] Xen and iSCSI

[Alvin Starr <alvin@xxxxxxxxxx>]

Andy Repton wrote:

> > And Xen itself handles the migration.. access to block device on host1 is
> > stopped when the access is started on host2 (after the migration).
> >    
> Are you saying that the change from dom0 handling the block device to
> the second dom0 handling the block device is completely transparent?
>
> E.g. I have a dom0 on one machine, A, importing a SAN block device and
> exporting it as /dev/sda to a domU, and an identical machine, B, with
> the dom0 importing the same block device. If I migrate the domU from 
> A to B, will the migration be seamless in the same way it would be if
> the domU was using iscsi to access the SAN?
Yes this seems to work correctly.

> If this is the case then why would anyone want the overhead of running
> iscsi in the domU?
I am not sure why but I am sure that someone has a good reason. It just 
did not seem to make sense for what I wanted to do.
> BTW, this is an interesting discussion for me as I now have my dom0
> setup to export evms drives as iscsi root to my domUs, before I go any
> further down this avenue, I am interested in investigating the
> alternative setups that allow easy migration.
>  
--
Alvin Starr                   ||   voice: (416)585-9971
Interlink Connectivity        ||   fax:   (416)585-9974
alvin@xxxxxxxxxx              ||




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