Gluster users - Dec 2011 - glusterFS : realistic for 40 nodes hypervisors and 100To ?

Hello,

I'm working on a cloud/virtualisation platform and i'd like to know
your point of view.

I'm dream about a shared file system (or cluster filesystem)  for lots
of hypervisor with lots of shared disk space (for HA, hot
migration,...).
Well glusterFS seems very  cool, easy configuration,  work in only
shared storage way (no need for replication).

Can I  use it for 40 nodes and 100To to host  ~700 VMs  ? What about
performance ? Is it realistic ?
Is it a good thing than the server and the client works on the same server ?



thank you in advance :)


Regards,



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Benoit