Ok, so I have some code to crawl a posting of a community and compare two servers for comments missing. It looks bad today. Both of these servers are version 0.18.0 and have been upgraded for several days.

missing 0 unequal 0 11 on https://lemmy.ml/ vs. 11 on https://sh.itjust.works/
missing 35 unequal 1 48 on https://lemmy.ml/ vs. 14 on https://sh.itjust.works/
missing 4 unequal 0 9 on https://lemmy.ml/ vs. 5 on https://sh.itjust.works/
missing 6 unequal 0 9 on https://lemmy.ml/ vs. 3 on https://sh.itjust.works/
missing 1 unequal 0 1 on https://lemmy.ml/ vs. 0 on https://sh.itjust.works/
missing 6 unequal 0 12 on https://lemmy.ml/ vs. 6 on https://sh.itjust.works/
missing 3 unequal 0 8 on https://lemmy.ml/ vs. 5 on https://sh.itjust.works/
missing 3 unequal 0 6 on https://lemmy.ml/ vs. 4 on https://sh.itjust.works/
missing 22 unequal 0 42 on https://lemmy.ml/ vs. 20 on https://sh.itjust.works/
missing 5 unequal 0 15 on https://lemmy.ml/ vs. 10 on https://sh.itjust.works/
missing 8 unequal 2 17 on https://lemmy.ml/ vs. 9 on https://sh.itjust.works/
missing 3 unequal 0 3 on https://lemmy.ml/ vs. 0 on https://sh.itjust.works/
missing 0 unequal 0 10 on https://lemmy.ml/ vs. 10 on https://sh.itjust.works/
missing 11 unequal 0 24 on https://lemmy.ml/ vs. 13 on https://sh.itjust.works/
missing 1 unequal 0 2 on https://lemmy.ml/ vs. 1 on https://sh.itjust.works/
missing 13 unequal 0 37 on https://lemmy.ml/ vs. 24 on https://sh.itjust.works/
missing 3 unequal 0 7 on https://lemmy.ml/ vs. 4 on https://sh.itjust.works/
missing 0 unequal 0 10 on https://lemmy.ml/ vs. 10 on https://sh.itjust.works/
missing 60 unequal 2 186 on https://lemmy.ml/ vs. 126 on https://sh.itjust.works/
missing 10 unequal 2 51 on https://lemmy.ml/ vs. 41 on https://sh.itjust.works/
missing 16 unequal 0 51 on https://lemmy.ml/ vs. 36 on https://sh.itjust.works/
missing 31 unequal 3 128 on https://lemmy.ml/ vs. 97 on https://sh.itjust.works/
missing 0 unequal 0 4 on https://lemmy.ml/ vs. 4 on https://sh.itjust.works/
missing 2 unequal 0 5 on https://lemmy.ml/ vs. 3 on https://sh.itjust.works/
missing 15 unequal 1 67 on https://lemmy.ml/ vs. 52 on https://sh.itjust.works/
missing 4 unequal 0 53 on https://lemmy.ml/ vs. 49 on https://sh.itjust.works/
missing 0 unequal 0 5 on https://lemmy.ml/ vs. 5 on https://sh.itjust.works/
missing 0 unequal 0 0 on https://lemmy.ml/ vs. 0 on https://sh.itjust.works/
missing 1 unequal 0 19 on https://lemmy.ml/ vs. 18 on https://sh.itjust.works/
missing 0 unequal 0 2 on https://lemmy.ml/ vs. 2 on https://sh.itjust.works/
missing 0 unequal 0 22 on https://lemmy.ml/ vs. 22 on https://sh.itjust.works/
missing 0 unequal 0 16 on https://lemmy.ml/ vs. 18 on https://sh.itjust.works/
missing 0 unequal 0 7 on https://lemmy.ml/ vs. 7 on https://sh.itjust.works/
missing 3 unequal 0 27 on https://lemmy.ml/ vs. 24 on https://sh.itjust.works/
missing 2 unequal 0 32 on https://lemmy.ml/ vs. 30 on https://sh.itjust.works/
missing 3 unequal 0 21 on https://lemmy.ml/ vs. 18 on https://sh.itjust.works/
missing 3 unequal 1 16 on https://lemmy.ml/ vs. 13 on https://sh.itjust.works/
missing 3 unequal 1 47 on https://lemmy.ml/ vs. 44 on https://sh.itjust.works/
missing 1 unequal 0 24 on https://lemmy.ml/ vs. 23 on https://sh.itjust.works/

The number of comments is based on loading comments, not the counts at the top of the posting.

  • haganbmjEnglish
    2·
    1 year ago

    Just to pose these in a similar thread, I have a few questions as a casual observer, some of which I’m unclear if they’re handled at the protocol or Lemmy level.

    • As I understand it servers subscribe to other servers and everything is then push based?
    • I assume ordering is not a guarantee. So there’s probably no concept of offset tracking on subscriptions or replaying a time range?
    • If ordering is not a requirement how do likes/comments handle out of order receipt? Everything seems to have a local ID, so can content get pre-liked before the root message arrives? Unclear if ID generation is based on any identifiers you’d have to work with or not - or whether remote content retains its origin IDs?
    • Lemmy at least appears to have some retry mechanism, but I’m unclear the behavior on that - seems annoying with 1000+ subscribing servers.
    • I seem to recall reading ActivityPub has some pattern for batching, but reading the spec again I’m not seeing it. Is that a thing?
    • maegul (he/they)English
      1·
      1 year ago

      Sorry I don’t know the answers to these questions. Also, I don’t think the OP will get a notification for your content (?) unless you reply to them directly, just in case you want to ask them.