This paper shows that in single-threaded writes to Redis, the kernel IO mediation takes 84% of processing time. https://www.usenix.org/system/files/conference/osdi14/osdi14-paper-peter_simon.pdf …
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I wonder why they didn't just go with RDMA. It seems like a natural fit and requires less hardware-specific config. Is it security issues?
@hausdorff_space In case you haven't seen it, they mention a reason just before section 3. Their reason implies they didn't want to virt...
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@hausdorff_space ...ualize RDMA channels and mux multiple virtual queue pairs over the same QP, which is reasonable but causes you to run... -
@hausdorff_space out of the number of QPs the NIC will handle on the fast path quickly, even if you're only talking to a few machines. - 1 more reply
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