this post was submitted on 28 Aug 2025
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PieFed help
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It's seems right that we should have a local community to help us all with PieFed
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@rimu@piefed.social might be able to answer better and more specifically since he is the admin for piefed.social, but here is some info on what might be happening.
Federation in piefed works the same as it does in lemmy...in that piefed won't get posts for a community unless a local user is subscribed to it (lemmy provides the most recent 20 posts to an instance when the first subscriber joins). So, until a user from piefed.social subscribed to those communities, then no posts would show up. As a corollary to this, if there is one local subscriber that then unsubscribes, posts will stop federating over. So, that can cause things like gaps in federation.
As for automatic deletion of older posts...this is something that a piefed admin can do on a community by community basis. When it is turned on for a community, that retention policy is listed in the community sidebar. For instance, if you look at the sidebar of !anime@ani.social, you will see that posts are retained on piefed.social for 365 days.
The communities you have listed don't have a retention policy in the sidebar, so I don't believe this is the issue. Most likely it is due to federation not starting until a certain point.
I know that rimu was actively working on an archiving feature for piefed, but I think this feature isn't live yet. The archiving would basically "archive" old posts in object storage instead of deleting them. So, if somebody does try to load up an old post, it might take a hair longer to load as it is unarchived, but it wouldn't be deleted and inaccessible.
Okay then it's fine. I was afraid it was a compulsory thing. I wouldn't consider importing my Lemmy communities on Piefed if it forgot old post.
Okay. Well I was just curious. I suppose all the posts will show up after I migrate the communities over here.
Thanks!
Community migration doesn't backfill like this. Instead, it simply reassigns all the posts that the instance has in the old community to the newly migrated community. So, if there are important posts/comments that aren't federated over yet, you should force that federation before going through the migration.
To force federation of a post/comment in piefed, go to the community on its home instance and locate the post/comment that you want to bring into piefed. Copy the canonical link from that post comment. This is the link that the little fediverse icon points to (it's a little version of this logo):
Then, go over to the community on piefed, and near the bottom of the sidebar, there is a link to "Retrieve a post from the original server". Click that and paste in that canonical link you grabbed. Piefed should go out and pull over the post/comment that the link points to. One thing to note is that you can't pull a comment that is a reply to another comment without first pulling what it is in reply to.
Wow thanks. It's less obvious than the Youtube video makes it out to be.
Your comment should be stickied somewhere.
EDIT: I'm retrieving posts from the original SDF community one by one (good thing it's a small community with low bandwidth 🙂) and I notice that, while the posts appear, the original downvotes/upvotes aren't. copied over. I don't really care, but I figured I'd mention it.
This is a limitation of the api and is also what happens when force-federating content from lemmy to lemmy instances as well. TBH, including all the vote information for each post/comment is probably overkill and would bloat the api responses a lot.
When you are using an app/frontend to browse lemmy/piefed, the vote totals are displayed, that is simple enough. However, on the backend, each vote has a bunch of information attached to it like user/instance/timestamp/etc. All that information is not included when force-federating content, thus the lack of votes after being federated over.
Well, the overall score was reflected on those original posts piefed.social mirrored by itself. So it did work at least once. It's those extra posts I forced Piefed to retrieve manually that all came with the default score of 1.
Like I said, it doesn't really matter. But ideally when I finally decide to relocate the communities, I'd like the Piefed copies to be identical. But the scoring is not important: what I really care about is the content and that made it across, now that I finished the retrieve job manually. So it's all good.
Well done