[Linux-cluster] non-RH/Suse systems?

[yvette hirth]

hi,

i have three ubuntu 9.04 boxes i'd like to cluster.

one is running on a DL380 G6 so i have ILO2 on that box.

the other two boxes would need to be upgraded to hardware that has 
fencing.  as i'm pretty happy with the DL380 G6 i'd upgrade those two 
boxes to G6's, but before we spend that cost, we'd like to know if we 
can cluster ubuntu.

anyone using ubuntu?  if so, problems?

thanks for the info and your time.
yvette hirth