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 HPC University: Did you hear the one about the station wagon full of disk drives going down the Interstate?
 
Sunday September 12, 2010
At one point, you may need to investigate and compare the performance (e.g. bandwidth and latency) of various network fabrics, such as gigabit Ethernet and Infiniband.
A boatload of data needs to be moved from one cluster node to another cluster node. Your task is to use NetPIPE to determine:

-The optimum packet size to use if the underlying transport is TCP over Ethernet

-The optimum packet size to use if the underlying transport is TCP over Infiniband

-How much lower the latency of TCP over Infiniband is than that of TCP over Ethernet

Try to produce a graph that illustrates your answers to the first two questions. gnuplot is likely to be your best friend here.

Resources:

-NetPIPE Download/Information
-Quick Background on Ethernet and Infiniband
-TCP Reference
-gnuplot
-Wikipedia page on Infiniband

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