The recording will be available later, but if you're interested in enabling a global consistent view on hashtags, know stuff about DHTs or #ActivityPub relays, you can have a look at the paper: https://git.orlives.de/schmittlauch/paper_hashtag_federation/src/branch/master/paper_hashtag_federation.pdf
Please contact me about any questions, remarks or other feedback!
So here's a TL;DR:
The problem about the current state of hashtags in the fediverse is that users have a fragmented view on posts, depending on their instance. Some posts containing a hashtag never reach your own instance, so you won't see it. This is bad for decentralisation and coordination.
I plan to throw some additional P2P stuff at the fediverse: All instances are distributing the responsibility for relaying or storing posts (just their IDs) among themselves using a Distributed Hash Table. ->
@schmittlauch Wow, much respect for thinking about this. It's the largest problem IMHO since the beginning.
I still think the solution is separate software so that every platform does not have to implement more complex stuff than extra search REST API calls. I have not read your (long!) paper yet.
My current preferred solution is a network of index servers that share data over a p2p or similar. Platforms communicate with them over REST API's.
@schmittlauch the index servers wouldn't need the whole content of the posts, only 1) ID and 2) hashtags. This would allow platforms to make search requests for ID's and then they can fetch the ID's for actual content. This would make running the specialized index servers lightweight and would not introduce additional complex p2p development requirements to platforms themselves. Implementing AP alone is hard enough.
@jaywink I also propose the separation into a transparent application proxy component, lain even suggested to implement it as a relay.
Regarding "index servers" it depends on what you mean by that: If the index servers are supposed to crawl the Fediverse themselves then good luck with keeping up with its load: At the scale of that'd be ~140,000 posts/second. Furthermore, the indexers might not even know each server.
Thus I propose that as an opt-in instances actually push ->
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