#XDP

@StevenFan Probably the best thing to learn about is #XDP & #eBPF.
XDP: start here https://www.iovisor.org/technology/xdp
eBPF is the enabling technology for XDP (and much more besides), https://ebpf.io/

With XDP, the network becomes programmable at the kernel layer. E.g. Facebook's load-balancer uses XDP for the fast path https://engineering.fb.com/2018/05/22/open-source/open-sourcing-katran-a-scalable-network-load-balancer/ — easy to see how this kind of multiple point-of-presence could be useful to a self-hosted DC network facing political attacks on its edge connectivity…