It's both ways. They effectively break that link and become isolated from each other.
this post was submitted on 10 Mar 2025
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What about any cache of past, shared content? Is there any such thing?
that stays up
I'm just curious if 'B' still retrieves the content from 'A' to show in user feeds.
It works the other way around: instance A pushes the content to instance B. Therefore if A defederates B, then obviously A ain't gonna be pushing the content.
There's an edge case where instance C is involved: A could comment on a post on C, and then C would forward it to B as well. But then B wouldn't be allowed to fetch the user profile from A anyway and might just drop it regardless. I'm not sure the particular way Lemmy handles this.
It works the other way around:
Is that the while story, though? A defederating B also means A rejects content from B, right? Otherwise, it would be less than useless: defederating a CP hosting instance yet still allowing B to push that content to A would be disastrous.