jointhefediverse.net seems to be a commonly linked resource for directing people to join the Fediverse.
Curiously, it does not list Lemmy under the list of Reddit alternatives. Their GitHub README explains why.
Previous relevant discussion: https://lemmy.ml/post/78808
https://piefed.social/ is catching up
Any way to migrate a self hosted lemmy instance to piefed?
No, it’s not geared up for that. There’s a platform called sublinks where the intention is to be initially compatible enough with Lemmy that it can be a drop-in replacement, but they haven’t released anything yet.
And with their current pace, it seems likely they never will. There’s been no major development on it for months as far as I can see.
Python based: I was looking for that
Yeah, I don’t expect it to scale well. Certainly not as well as Rust.
In terms of incoming federation, PieFed sites are dealing with as much activity as any general Lemmy instance. It’s not happened yet, but I suppose it’s possible that problems will become apparent if the amount of local users gets over a certain size. A limit on the amount of users per instance isn’t necessarily a bad thing though (it’s cheap, and hopefully easy enough, for someone to spin up another one).
What’s going to cause problems? Python, the db, redis or other?
It uses postgres for the DB - I think that and redis are designed to operate at very large scales, so it wouldn’t be them.
My guess would be that it’s something in the interpreted nature of Python - this seems to be why a familiar dismissal of PieFed is a concern about how it will scale.
That said, this site shows that Python is the most popular language for Fediverse apps (just), the likes of Mastodon are written in another interpreted language (Ruby), and I think there are more big websites running Python (with Django or Flask) than people realise. So I don’t know, really, I’m just following other people’s lead on this. I don’t imagine that any problems would be insurmountable though: an admin could restrict the amount of signups, or if new users mean a few more donations, they could just throw money at the problem (more cycles for one server, or splitting up tasks across multiple servers).