Regarding this thread going off-topic - I was amused by RGB's static anecdote during a rather busy day at work, so am thankful it was shared.<br><br>To add my own on-topic contribution, I do solid-state chemistry calculations and ran into the 32-bit memory limitations of Linux early on. This led me to attempt to learn mpi (not wholly successfully) about 5 years ago and then to jump onto the Opteron architecture as budget permitted. I do not know if the OP's work will require more than 1 - 2 Gb per process like mine does (I'm doing my graduate research on my personal humble 3 node dual-Opteron cluster - I added two nodes about a year ago and my earlier floundering with mpi has paid off - everything works now).<br>
<br>Even if the OP's work does need 64-bit memory space, the fileserver / backup machine could still be 32-bit and not used as a compute node. Don't overlook periodic DVD burning as an archiving possibility.<br>