[Beowulf] Computation on the head node

[Vlad Manea]

Hi guys,

I have a question regarding the head node for a small cluster that I 
would like
to build:

which are the disadvantages of using the head node as a computation node?
Since I plan to have NFS on it, I guess there will be problems with 
comunication
which probably will slow down the whole cluster, but I am not sure since 
this
is my first attempt to built one...

Thanks,
Vlad