this post was submitted on 04 Jul 2023
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You Should Know
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YSK - for all the things that can make your life easier!
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How is this different than any other website?
I can't just spin up a website and automatically get that info from other websites, but I can spin up a lemmy instance and get that info from everyone it's federated with.
How is it even possible to do a SQL query on the database from another instance?
Makes no sense, databases should be private and behind the HTTP API. Why is he showing a SQL query as evidence?
So I'll assume this is done via the HTTP API then. If that's the case, why does an instance needs to see this information from other instances? By needs I mean if there's an actual purpose for that info being exposed.
You don't query another instance's database.
When your instance is federated with another, your instance will sync a local copy of threads and interactions from that instance.
You then query your own database and instantly have access to everyone else's interaction data.
Wow. Off-topic but that sounds inefficient for very large networks of instances. Sounds like the federation is doing more that it should.
Is there some place to learn about the federation protocol?