[Architecture] Hub-Spoke model for federation? · Issue #3245 · LemmyNet/lemmy
github.com
Question One of the biggest issues I am currently seeing with Lemmy, is federation. Either... Federation between instances having issues. Federation is backed up. Federation / Syncing is not scalin...

https://github.com/LemmyNet/lemmy/issues/3245

I posted far more details on the issue then I am putting here-

But, just to bring some math in- with the current full-mesh federation model, assuming 10,000 instances-

That will require nearly 50 million connections.

Each comment. Each vote. Each post, will have to be sent 50 million seperate times.

In the purposed hub-spoke model, We can reduce that by over 99%, so that each post/vote/comment/etc, only has to be sent 10,000 times (plus n*(n-1)/2 times, where n = number of hub servers).

The current full mesh architecture will not scale. I predict, exponential growth will continue to occur.

Let’s work on a solution to this problem together.

  • raws@lemmy.shEnglish
    3·
    2 years ago

    Is this accurate on how it works? My assumption was a user would have to be subscribed to a remote community on their local instance for that local instance to pull posts/votes/comments from the remote instance. It’s not like everything is replicated everywhere.

    • HTTP_404_NotFound@lemmyonline.comOPEnglish
      2·
      2 years ago

      Your assumption is correct-

      I gave worst-case scenario for modeling purposes.

      Realistically, the number of connections will be far less, however, do also note, this platform will soon be hosting over one million users. Everything, is going to scale upwards.