Re: [Xen-users] How to make network storage high available?

[Matthew Wild <M.Wild@xxxxxxxx>]

On Tuesday 27 March 2007 07:07, Dominik Klein wrote:
> > A question about this interesting topic. Is really nedded a cluster aware
> > volume manager?
>
> No.
>
> > I'm asking this because I'm thinking in a scenario where
> > two Dom0's access a shared iSCSI disk and the DomU migrates from one Dom0
> > to the other one. Do I need a cluster aware filesystem or volume manager
> > in that iSCSI shared disk? It would be needed if in the migration process
> > the DomU is executed in both Dom0 at the same time, but I'm not sure
> > about this.
>
> It is not needed. A shared iSCSI disk (with the same name in both dom0s)
> is okay.
>
This is how we have set things up. Nominally I have two storage servers 
connected with drbd, sharing lvm2 volumes through iscsitarget and multiple 
xen dom0 boxes. Each dom0 box connects to the storage box using iSCSI with 
consistent naming of the devices from udev.

Then run reiserfs, swap, etc on these partitioned devices, and live migration 
works a treat. No need for anything cluster aware so far.

Regards

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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