this post was submitted on 11 Aug 2023
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All hail lemmyverse.net (feddit.it)
submitted 2 years ago by [email protected] to c/[email protected]
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[–] [email protected] 34 points 2 years ago (1 children)

an ELI5:

When you set up a lemmy instance, it has no idea other instances exist. It's like throwing you into a web browser with no search engine. You don't immediately see every single website, you have someone tell you about a cool website you found, and then you type it into the address bar, and save it.

It's kind of the same thing with Lemmy instances and communities. Once a user types this syntax into the search prompt:

[[email protected]](/c/[email protected])

It will try and contact instance.com for that community. If it exists, the user can subscribe and the instances will now receive and send new posts to each other.

[–] [email protected] 7 points 2 years ago (1 children)

Mastodon has this issue too, fwiw.

[–] [email protected] 15 points 2 years ago

I wouldn't say it's an issue. Great way to make new instances not be flooded with 500000 submissions per second.

[–] [email protected] 13 points 2 years ago (1 children)

What does it mean “fetching communities on my home instance”?

[–] [email protected] 15 points 2 years ago (1 children)

Since no one answered: I think the users on the instance (copy of Lemmy) need to federate (connect) with other instances in order for the first instance to be federated (semi-permanently in communication) with those other instances.

[–] [email protected] 2 points 2 years ago (2 children)

I thought it had to do with communities

[–] [email protected] 6 points 2 years ago (1 children)

It is communities. You can be federated with another instance but until a user subscribes to a specific community it won't federate or appear in all

[–] [email protected] 1 points 2 years ago (1 children)

What is fetching

[–] [email protected] 1 points 2 years ago

I think they mean being the first user to subscribe to a community on their instance. If no one else has subscribed yet it won't federate over. First subscriber needs to search the whole community url then after any others can find it in search just by name.

Instances only federate communities once a user has subscribed to them. Otherwise instances would be inundated with hundreds of communities no one even wants.

[–] [email protected] 2 points 2 years ago

Yeah. The way it works with Lemmy is that communities are federated one-by-one with an instance, rather than whole instances federating with other instances.

[–] [email protected] 10 points 2 years ago (2 children)

This is actually bad for the instance. It costs a lot more resources to send and fetch submissions from a bunch more instances.

[–] [email protected] 17 points 2 years ago

That juicy /all feed though, worth it.

[–] [email protected] 14 points 2 years ago (1 children)

Eh, even with a LOT of subscriptions lemmy really isn't that heavy.

It's the outgoing federation (I hear) that really starts taking more resources

[–] [email protected] 3 points 2 years ago

Lemmy ain't heavy..it's my brother!

[–] [email protected] 9 points 2 years ago (1 children)

I am sure more knowledgeable people will provide the right answers. But I think it means that when you set up your own lemmy instance, you need to add the communities to it.

[–] [email protected] 9 points 2 years ago

not really add.

when you set up an instance, all will be empty. the moment an user subscribe to a community for the first time, that community will start appearing on all, for everyone to see.

for this reason all is different for every instance.

the motivation for it is resources. if a new instance would receive updates from all the communities on all the instances, it would be very much like ddos. and a small instance will not be able to endure it.

[–] [email protected] 3 points 2 years ago

A real Stakhanovite of the fediverse!