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Consider "nodes" = printed circuit boards (Paragon) or bunch of printed circuit boards sharing a BUS (SGI Challenge) where the N nodes are connected as a distributed memory architecture
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Inside each node, may have n=2,4,8 .... processors sharing a single memory.
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Should one use this shared memory or just consider total machine as distributed with Nn nodes?
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This is seen today (1995) as a network of SGI Challenge systems (i.e. metacomputer where conventional HIPPI network joins set of shared memory machines) or as a specialized torus network connecting Paragon nodes consisting of multiple i860's
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