Re: [Xen-users] HA Xen on 2 servers!! No NFS, special hardware, DRBD or iSCSI...

[Matthew Wild <M.Wild@xxxxxxxx>]

On Wednesday 07 June 2006 16:19, Chris de Vidal wrote:
> --- Matthew Wild <M.Wild@xxxxxxxx> wrote:
> > > > I've had live migration working using iet/open-iscsi supplied vbds
> > > > formatted with reiserfs.
> > >
> > > Cool, thanks for answering that.
> > >
> > > I have a question about your setup: After you live-migrate can you then
> > > power off the first node?
> >
> > I must admit it's not something we explicitly tried, but I don't see why
> > not. Apart from the configuration file and the contents of the log files,
> > there's nothing on the node you've migrated from to suggest the domU ever
> > existed there.
>
> Now I'm scratching my brain to figure out just how that's possible... does
> it copy the entire DomU over, including the hard drive?

No, the "hard drive" for the domU is provided via iSCSI from a storage server 
box. As long as the domU configuration points to a vbd with the same scsi 
label on each dom0 box, and they're online, xen can handle the migration.

Matthew
-- 
Matthew Wild                       Tel.: +44 (0)1235 445173
M.Wild@xxxxxxxx                    URL http://www.ukssdc.ac.uk/
UK Solar System Data Centre and
World Data Centre - Solar-Terrestrial Physics, Chilton
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX

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