100K/sec was achieved by yours truly 10 years ago on a contemporary xeon with nothing but nginx and python2.6 - gevent patched to not copy the stack, just switch it. (EDIT: and also a FIFO I/O scheduler)
Why does this require 36 cores today??
They are purposely holding the connections around for 1+10%seconds. So first of all, it means that, for a rate of 100k conn/s, they are going to have around 200k open connections after a second. This already imposes a different profile than 100k single request connections per second.
You are also assuming that they need 36 cores to achieve 100k connections per second, which is likely not the case since they quickly moved the bottleneck to the OS. I am assuming they have other requirements that force them to run on such a large machine and they want to make sure they are not running into any single-core bottlenecks (and having a large amount of cores makes it much easier to spot those).
> What this means, performance-wise, is that measuring requests per second gets a lot more attention than connections per second. Usually, the latter can be one or two orders of magnitude lower than the former. Correspondingly, benchmarks use long-living connections to simulate multiple requests from the same device.
Yes. Which is not what's being discussed here.
Why this is even here then?
I think limiting factor might be not number of cores and outside of erl scope, that is eth card they used, network infrastructure, etc. Even Elixir could be something that impacts the tests.
The work in some unknown state is at https://code.google.com/archive/p/coev/
Without the business logic (which was in django IIRC) and deployment details, obviously. Very outdated and some later patches might be missing. No one was interested, you see.
I'd be surprised if there were problems with network, and if there were, that should have been obvious in the metrics.
Maybe the metrics were inadequate
What does that mean? You keep qualifying "connections." It's a connection. It holds onto it's connection for X period of time. An HTTP request is just a single-request connection, which is NOT what this article is discussing.
