Scalability with respect to Architectural properties

• SMP clusters

  • n-number of nodes, p-number of processors/node
• original IBM SP n~128 p = 1
• SGI Origin 2K n=1, p~24
• new IBM SP with SMP nodes n~128, p~4

• Network characteristics

  • latency variations

• I/O Organization

Most often cannot be performed on actual System

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