Does Mastodon use fan-out write?
@manlycoffee I seem to recall activitypub is more like email, using inboxes and outboxes: https://www.w3.org/TR/activitypub/
@raiderrobert oops. I over-simplified my question.
Of course Mastodon does fan-out write.
Question is: if a note were to arrive on the shared inbox, will the note be cached on every follower on the instance, or will it be stored in a single table associated with a single user?