For the parent: and not only bottlenecked at single hops but also hampered by th... | Hacker News

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		ezekiel68 6 months ago \| parent \| context \| favorite \| on: Copper is Faster than Fiber (2017) [pdf] For the parent: and not only bottlenecked at single hops but also hampered by the propagation of latency as the hops increase, depending on the complexity of the distributed system design.

throw0101b 6 months ago [–]

> […] by the propagation of latency as the hops increase […]

Which is why you get network topologies other than 'just' fat tree in HPC networks:

* https://www.hpcwire.com/2019/07/15/super-connecting-the-supe...

* https://en.wikipedia.org/wiki/Torus_interconnect

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