[Beowulf] NFS server for a small cluster

[Dmitry Zaletnev]

Hello, list
I'm going to prepare NFS server for my small PS3-cluster. So, I've a question: if I use 4 SATAII ports for 250 GB disks in software RAID0, is the performance of CPU critical? Witch one should I use Core Duo/1 MB cache or Core2Duo/6 MB cache and how much of DDR2-800 RAM, 2 GB or 8 GB?
I'm going to use it for transitional/ unsteady state CFD simulations.
Thank you for any suggestions.
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Dmitry Zaletnev