Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era Interconnect

Re:Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era ... by kijiki on Wednesday May 06, 2020 @12:59AM (#23088031)

You can get 400Gbps bandwidth in commodity networking: https://www.fs.com/products/96982.html

Not going to get that sort of latency without extreme custom chips though.

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Re:Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era ... by jiggawatts on Wednesday May 06, 2020 @01:49AM (#23088226)

Wow, that's not even that expensive!

I generally don't get to play with hardware much these days, but my "dream" on-premises kit would be a hyperconverged cluster with AMD EPYC 2 CPUs, NVMe storage, and 400 Gbps networking. It would be interesting to see what kind of performance that would enable compared to the typical cloud platforms everyone is so excited about...

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Re:Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era ... by briffle on Wednesday May 06, 2020 @11:17AM (#23091912)

Don't forget to add about ~$1000 per port for a 400GB transceiver.

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Re:Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era ... by gnufx on Wednesday May 06, 2020 @05:30AM (#23089234)

Gbps isn't a unit of latency (or message rate).

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Re:Rosetta: The Engine Behind Cray’s Slingshot Exascale-Era ... by exikyut on Wednesday May 06, 2020 @10:00AM (#23090995)

($15K)

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