It depends on how the image posted, the thumbnails might get federated. If the image is used in a post/comment body, usually the thumbnails are not federated.
How did you check this? From my understanding, images from external servers are copied (and transcoded) over locally. At least in my server (running 0.18.4), they do.
ludrol@bookwormstory.social 1 year ago
There is a possibility that my instance is buggy and it isn’t caching images even though it should.
hitagi@ani.social 1 year ago
It’s pretty inconsistent from my experience. Sometimes images do cache and sometimes they don’t.
Rentlar@lemmy.ca 1 year ago
Let me try to figure this out. The first is a photo uploaded to lemmy.world, the second is a photo originally uploaded to lemmy.nz, both posts are in a federated version of lemmy.world’s shitpost community.
This is just a theory, but perhaps images hosted on the same server as the federated community will directly link, whereas images uploaded somewhere other than the federated community will be copied into cache, presumably in case the original host shuts down unexpectedly? See if this is the case?
hitagi@ani.social 1 year ago
ani.social/post/288601 - This image is uploaded from a user on the same instance as the federated community (lemmy.world) but the image is cached.
ani.social/post/285354 - This image is uploaded from a user on a different instance (lemm.ee) from the federated community (lemmy.world) but the image is not cached.
The behaviour is pretty weird. Hopefully we can disable image caching/copying-over-locally so we don’t have to deal with problematic images hosted by other instances.