You missed model serving (I think ?). Tough and latency sensitive esp for recommender systems. Prone to latency spikes, traffic spikes. Even with a well-written Python code you can run into limitations quite quickly.
> Nothing fancy.
Well, right now I am seeing lots of low-level innovation for networking/storage along with RoCE, Infiniband, Tesla's ttpoe, the recent addition of devmem-tcp to the linux kernel (https://docs.kernel.org/networking/devmem.html) and wondered if there are approaches on how to plug something like that together on a higher level and what the considerations are. I surely assume EFS or S3 might be too expensive for a (large) training infrastructure, but I can be wrong?
> You missed model serving (I think ?).
I think I have a better grasp on the engineering challenges there and could imagine an architecture to scale that out (I believe!).