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Lemmy.world is too big, use other instances
(hackertalks.com)
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this post was submitted on 23 May 2024
157 points (87.9% liked)
Unpopular Opinion
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would be cool to link to current federation issues so people would actually see what's happening and how vast the problem is. I'm sure someone must've already made a list
Good point, here is a post I made today, you can see I don't get the comments on my lemmy instance. https://lemmy.world/post/15702974 vs https://hackertalks.com/post/3065575
I also updated the main post with general links to the issue. My one example just demonstrates it's happening to other instances not just Australian instances, but the Australians have done the best documentation of it so far.
For that example, there may be something else going on. The time behind graph for Lemmy World- > Hacker Talks seems to only average about 90 seconds. Some of the comments that show up on LW were made hours ago. If it were just federation delay, they should have arrived already.
Assuming those are going straight to your Lemmy server and not to a proxy that buffers them? If you've got a federation proxy buffering those, then the graph would be off since it wouldn't show what's sitting queued in your buffer.
You still definitely have a point. Every couple of weeks, my instance seems to start lagging behind by several hours and then goes back to normal after a few days. Still not sure why unless there's just a huge uptick in activities being sent out from LW. I made a post about it yesterday, but it doesn't dive too deep into the technical details; basically just an info post to let people on my instance know I'm aware and trying to do what I can about it.
Good point. And thank you for the graph. It could be that the activity pub protocol is best effort, and if lemmyworld is overloaded, or just dropping packets, whatever activity was supposed to be sent at that moment gets lost forever. That would explain me divergence, and lack of eventual consistency
But I only have data for missing posts from lemmy world, and only some communities.
I don't know the actual cause of the issue, but I think it is definitely related to the size of the instance. So from an empirical perspective the advice is still promote communities on non-mega instances
There is a very simple explanation for this specific case: nobody on hackertalks.com is subscribed to !goodoffmychest@lemmy.world!
Most community related activities on Lemmy will only be sent to instances that have at least one subscriber for the community.