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?

  • akkajdh999@programming.devOPEnglish
    4·
    6 days ago

    Thanks but this is quite high-level.

    Okay, so Alice makes a request to A. A makes a request to B. B makes requests to all other instances.

    If you get posts from your home instance, does it mean that all instances duplicate the same database?

    • Zak@lemmy.worldEnglish
      3·
      6 days ago

      They don’t duplicate the database in a technical sense, but when things go right, they each have a copy of the same post and comment text, and the same votes.

      • akkajdh999@programming.devOPEnglish
        2·
        6 days ago

        Do you mean that the database is not identical, but still duplicates all data, basically? (you said “they each have a copy”, I assume it’s persistent on disk). So if we have 100 lemmy instances, they all save the same post.

        • Zak@lemmy.worldEnglish
          3·
          6 days ago

          Correct. Each server that shows the post to its users stores a copy of the post. It does not necessarily store attached media (IIRC Mastodon usually does and Lemmy usually hotlinks media).