10-30-2006
I agree mostly with Perderabo's definitions. I'd just add examples.
Parallel Computing - A vector supercomputer like a Cray. Older Cray's like the Y/MP and so on. I know they are now making more distributed/clustered supercomputers too, but the big single Cray boxes are the example of Parallel supercomputing.
Distributed Computing - A huge set of systems all doing the same thing. You can add, remove, and replace an individual one without affecting the overall service at all. Something like the huge Google linux farms that handle search requests.
Grid Computing - I can't come up with a better example than Perderabo's SETI screensaver grid. A commercial example would be Sun's grid they rent out for $1 per hour per cpu.
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