Due to the unfortunate down-time of slrpnk.net we are currently researching possible blockers for creating a Lemmy to Piefed migration guide or script for a relaunch in 1-2 months.
I have never done such a migration before, but generally it seems possible, although migrating image uploads from Pict-rs adds additional complexity (that might not be worth it).
I have created an issue on Codeberg about possible blockers here, but additional input on possible issues or examples of similar migration scripts would be appreciated.
If anyone else has similar plans, please let me know so that we can work together on this.
I don’t know how to link to users, but I think Ada, the admin of lemmy.blahaj.zone, recently migrated the instance to Piefed. Might be worth reaching out
Edit: found the post I was thinking of. Looks like it’s not a full migration, but there might still be some relevant insight.
I’m also now remembering another instance that has done a migration recently. I think it seemed like they were able to migrate across a lot of info, but possibly not users’ subscribe lists(?), I think? I don’t remember specifics, but I’ll update this post if I stumble across the post I’m remembering
I would need to check at database level, but I guess on the subscribing side it is only a list of communities to display? The real “work” for subscriptions happens on the remote instance to decide with activities to send.
But that indeed raises the interesting point on how to retain subscriptions of remote users. Anyone got an idea how that is handled on database level? Is it just the same list but for the non-local users that are mirrored in the database?
https://quokk.au/
They actually migrated stuff from Lemmy? I thought it was a new instance?
It used to be a Lemmy instance since around 8 months: https://lemmy.world/c/[email protected]?dataType=Post&sort=Old
For more details: https://lemmy.world/post/31077672
Ah, right they just swapped out without migrating anything. Thats not really what we are aiming for, but their comment confirmes that remote subscriptions might get lost.
Lemmy.ca also created a secondary piefed instance recently.