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		halbritt on Oct 30, 2018 \| parent \| context \| favorite \| on: Lawrence Livermore National Lab's powerful new sup... What is the distinction between low latency networking commonly used in supercomputers today and cloud computing? What is the cutoff? I've commonly seen 500 microsecond latency between certain AWS zones. That's pretty impressive. Inside a given zone, 200-300 microseconds isn't uncommon.

scrooched_moose on Oct 30, 2018 | [–]

Infiniband is on the order of 1 microsecond between compute nodes and 100 Gb/s throughput. It's often still the bottleneck in HPC systems.

https://en.wikipedia.org/wiki/InfiniBand

wmf on Oct 30, 2018 | [–]

HPC networking is more like 2-3 microseconds. Also it's 200 Gbps instead of 25 Gbps.

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