[Xen-users] Stability of Image Files

[Simon Dean <sjdean@xxxxxxxxxxxxxxxx>]

Hi,

I think I've nearly evaluated all choices for which Virtualisation 
option to go to. Disappointed so far that I can't get my PCI Cards 
visible in a guest, but never mind.
On the same hardware (2 Gig RAM, AMD Athlon 64 3500 and a Fedora Core 8 
i386 install), OpenVZ has a tendency to "freeze" up every now and again 
in SSH.KVM/Qemu seem to slow, Xen seems really quite brilliant.
If I convert my main server to an image file, what happens if that image 
file gets corrupted? Does such a thing happen? Seems a bit awkward to me 
placing all your eggs in one basket. Or am I overly concerned about nothing?
Additionally, the main thing I wanted to do with Virtualisation was to 
be able to migrate to another host at a drop of a hat should I need to 
shutdown the host. That's also a bit difficult with an image file? 600 
Meg file takes 60 seconds for me, so, even a 5 Gig image file would 
take? What? 8 minutes? Does it transfer the image file or the contents? 
It's probably still quite silly if I think about the OpenVZ and 
transferring at minimum 2.2 Gig for a decent install.
Cheers
Simon

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