A comment from Brock Palane please? https://www.nextplatform.com/2018/10/18/great-lakes-super-to-remove-islands-of-compute/
I did a bid for a new HPC cluster at UCL in the UK, using FDR adapters and 100Gbps switches, making the same arguments abotu cutting down on switch counts but still having a non-blocking network (at the time Mellanox were promoting FDR by selling it at 40Gbps prices). But in this article if you have 1x switch in a rack and use all 80 ports (with splitters) - there are not many ports left for uplinks! I imagine this is 2x 200Gbps switches, with 20 ports of each switch equipped with port splitters and the other 20 ports as uplinks.
_______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
