Bent Terp wrote:
2 minutes of frantic googling led to this project: http://www.kerrighed.org which at least seems to be alive, but I haven't tried it myself.
You might also want to look at this one: http://www.xtreemos.org/
those are both grid solutions. as any high performance clustering solution inherently must be. You still have to program with MPI or anther grid-oriented programming methodology and break your workload up into parallel chunks
The OP specifically stated he wants his cluster to function as a single processor, so a single conventionally written (and presumably single-threaded) program would run faster, and thats just not possible.