Metacomputers are a very important trend which uses similar software and algorithms to conventional "MPP's" but have typically less optimized parameters
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In particular network latency is higher and bandwidth is lower for an informal HPC
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Latency is time for zero length communication -- start up time
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Formal high performance computers are the classic (basic) object of study and are
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"closely coupled" specially designed collections of compute nodes which have (in principle) been carefully optimized and balanced in the areas of
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Processor (computer) nodes
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Communication (internal) Network
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Linkage of Memory and Processors
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I/O (external network) capabilities
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Overall Control or Synchronization Structure
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