----- On Jan 5, 2020, at 4:48 AM, John D'Ambrosia jdambro...@gmail.com wrote:
Hi, > At the very end you note 100base-t as a precursor to 400g. 100baset really > found its success as an access solution - computer connections. 400GbE will > be > an aggregation / core solution. It will be some time if ever where 400GbE is > used as an access solution - perhaps some hpc applications. > Cost and no need for that sort of bw. When I was at SuperCompute 19 in Denver last November, some people were looking for a switch supporting 200G so they could connect their server to it. The server had Mellanox 200G NICs. There was also an interesting NASA talk about how high bandwidth allowed them to accelerate their data analysis of anything from windtunnel results to live spacecraft launch telemetry. If I learned anything working with DC guys, it is that you give the server guys bandwidth, they will find a way to use it. That said, I agree with you that it will take a while before that'll be anywhere close to 400G. The last cloud environment I worked with recently was still in the process of qualifying 25G for their server farms. TORs were not even considered yet and were still running 10G downstream. Thanks, Sabri
