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Not sure why you say haproxy can't serve python. I do it all the time. You just use something like python waitress and then point haproxy to it's port.
It depends on what you use on the Python side. Classically that would have been uWSGI or one of the *SGI interfaces, and lately ASGI.
Sure, one can totally make Python apps that serve HTTP directly. The same can be done with PHP (and Ruby and others) as well, but most people still run their PHP through PHP-FPM over FastCGI because you can offload a lot of the work to the much faster NGINX side. A fair amount of apps make use of
X-Accel-Redirectto serve private files, so you don't tie up a PHP worker for an hour serving the user's 2GB file.But yes, as those languages all move to async computing and away from worker pools, it's more common to see those serve HTTP directly, and there's less and less need for a proxy that supports those other protocols. The async event loop is what made NGINX special when it came out, so naturally languages that moves to that model greatly reduce the need for that as well, they too can easily handle thousands of concurrent connections no problems. Plus these days people slap a CDN in front anyway so static file performance doesn't matter quite as much.
Ye pretty much. I was just quite astounded at that statement as the AI Horde is basically just a lot of python processes behind a very low powered haproxy server.
Personally, I understand people like to stay with the familiar, which is perfectly fine for a non-demanding service, but when something becomes demanding, I find the haproxy specialization serves better. I wish lemmy deployment by default utilized haproxy myself.