[Beowulf] OS for 64 bit AMD

[Mark Hahn]

> > It is also faster than ext3 (google for the benchmarks).

the believability of FS benchmarks is far worse than other benchmarks
mainly because the domain is so large.  merely answering "what kind of 
IO do you care about" requires a handful of dimensions.  measuring it
means convolving those dimensions with a heaping handful of newer,
orthogonal ones like "what chunksize is your raid", etc.