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This probably has a very simple answer, but I always wonder how the provide load on these sorts of tests. Can you get by with 2-4 other servers with 400Gb/s links and just tons and tons of simulated IPs/ports to activate LACP balancing? Because you probably want to simulate simultaneous clients that stream at varying rates, probably in the range of 0.3 - 10 Mbps, which means hundreds of thousands of clients to saturate at 800 Gbps, right?

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The author's answer as of 2021: https://news.ycombinator.com/item?id=28586767

EDIT: I recall reading that the Netflix client can continuously select between multiple content caches. I'm guessing they do this because it's a quality-of-service and capacity win over making a "best guess" at the start of a session, and sticking with it. It should also enable transparent recovery from a broken or slow cache node. If you test in a busy place with multiple caches, the loss of one needn't be a big deal.

Oh wow, production data, that seems risky, but if it works without too much disruption...

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