this post was submitted on 01 Jul 2023
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Asklemmy
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I don't see any reasons why you couldn't run more copies of the backend and frontend, as long as it uses the database properly. It should scale horizontally decently for a while.
At work I have clusters that runs 40-50 application servers all going to one database and handles millions of requests daily, on a pretty inefficient PHP application. Lemmy being in Rust, it can handle a lot of traffic.
Given the frontend is in nodejs, I suspect we'll need to scale up the frontend first, which should be no problem at all, just many copies of the frontend to fewer copies of the backend to fewer copies of the database. Maybe slap Cloudflare in front at some point.
It will probably get costly to run before it becomes hard technically to scale up.