We're still using ODM built servers that are available for the public.
Yes, moving off the shared infra chassis helps us improve reliability & cost thru simplicity, and enables us to scale our infrastructure using single nodes vs. X nodes as the smallest scaling unit.
Our machines are stateless as our globally interconnected infra is widely distributed and replicated. Hence we moved to no-hotplug.
hey, this is Rami ... I lead HW team at Cloudflare.
Great Q! .. in our case, there was a sweet spot between the number of cores, the L3 cache per core, NUMA latencies, mem bw per core, cost & power. The 48c gave us the best req per second per $, and it likely was due to a combination of all these things.
We have two more blogs that will come out probably today, which will shed more light on why AMD worked better for us.
Stay tuned for 3 more blogs this week ... they will give deeper analysis on the perf % gains we saw and why.