this post was submitted on 12 Jun 2023
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I believe that's mostly because of websockets. The devs are changing the UIs from using websockets to just normal html rest api calls. That should help with a lot of load, since you will have to manually hit refresh to reload the site (like reddit), and will allow scaling horizontally since each html request doesn't need to run on the same server as the previous request.
Getting rid of websockets would help a lot. But you still might not be able to have standalone nodes. You might still need a cluster of nodes with a master and slaves due to the federated nature of lemmy. Such that only one node at a time can handles federation events with other servers. I don't know enough about the protocol to know if that is the case or not. Just as an example I'm thinking of situations where one node gets a federation event for example for a post, then a different node gets a federation event with some sort of change to that post, and handles it faster than the first node. That event would then fail because the post hasn't been created yet.
Interesting. I didn't think of that. Maybe some sort of queue would help, but yeah not sure. Maybe the protocol can handle that already. I'll have to read through it at some point. :-)