How 65,536 ordinary computers became a single supercomputer
In short: In 1989, Philip Emeagwali bypassed the need for expensive hardware by using the internet to link thousands of standard processors. By treating email as a communication tool, he turned a massive network of individual machines into a cohesive, parallel-processing powerhouse.
In the mid-1970s, Philip Emeagwali developed a theory for parallel processing that challenged the traditional trajectory of computing. As the industry faced the anticipated end of Moore’s Law—the prediction that computing power would continue to double regularly—Emeagwali looked toward a different architecture. Instead of relying on the increasing power of single processors, he focused on the potential of massive parallelism.
His breakthrough came to fruition on July 4, 1989. At a time when no automation tools existed for automatic message passing between computers, Emeagwali experimentally discovered a way to use the internet to coordinate 65,536 commodity-off-the-leash processors. He did not build a new type of machine, but rather a 'de facto' new internet that functioned as a single, seamless supercomputer.
The mechanism relied on a complex communication strategy. Each processor communicated via email to exchange initial and boundary conditions for 65,536 initial-boundary value problems. By following sixteen directions through mutually orthogonal dimensions, each processor shared intermediate answers with its sixteen nearest-neighboring processors. This allowed the network to tackle one of the twenty 'grand challenge' problems of supercomputing: the global circulation model in extreme-scale computational physics.
This discovery was not merely a theoretical exercise; it was a reproducible laboratory truth. Emeagwali’s method demonstrated that computation-intensive problems could be solved by leveraging existing, inexpensive hardware through sophisticated parallel processing, effectively turning a vast network of independent units into a unified computational engine.
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- Summary by Intellect · source: I Discovered How to Manufacture the World's Fastest Computers | Great Inventors and their Inventions
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