Fediverse

29634 readers

721 users here now

A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).

If you wanted to get help with moderating your own community then head over to [email protected]!

Rules

Posts must be on topic.
Be respectful of others.
Cite the sources used for graphs and other statistics.
Follow the general Lemmy.world rules.

Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy

founded 2 years ago

MODERATORS

[email protected]

Can you explain how federation works on protocol level? (programming.dev)

submitted 1 month ago by [email protected] to c/[email protected]

44 comments fedilink hide all child comments

Let's say we have lemmy instances A, B, C.

alice from A makes a post "Hello, world" to B. What happens? How is it processed on servers A, B, C and how do users from A, B, C receive her post?

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 5 points 1 month ago (2 children)

Thank you, very clear.

So B will list all users subscribed to foo, look at their instances, and send the update to them.

I assume that if someone from a new instance (D) subscribes to foo, then D will need to request all the old posts from foo, since they weren't pushed to D?

[–] [email protected] 10 points 1 month ago

I assume that if someone from a new instance (D) subscribes to foo, then D will need to request all the old posts from foo, since they weren’t pushed to D?

Lemmy is pretty bad about backfilling content. Communities do have outboxs, but these only list the last 50 posts and you can't get the vote or comments on any of them. See GitHub issues #5283, #3448 and #2004.

[–] [email protected] 3 points 1 month ago

ActivityPub works like a magazine subscription. They don't send you back issues for subscribing.