World reverted to a few months ago IRL. Backups also don't work (No mods)

[Bichigusomaru]

After the recent update, my dedicated server looked like it did a few months back. Most of our progress got reset.

I keep backups every week or two. So I try the most recent one, and *everything* is reset to a blank world day 1. I try two more backups and those are both reset to the state of a few months ago.

My backups were without modifications and left alone after copied from the appdata folder. Even the .old files are wrong. It seems like the game is reading the worlds wrong or editing them after this recent update.

[Caramel]

Having the exact same issue. Not on a server however, but a locally saved world. It lost a couple hours of playtime. Tried to use the .old file, same result. Tried a manually created backup copy from another folder, same result. World is set back roughly 15 hours of playtime, both with or without steam cloud turned on.

[Bichigusomaru]

Yeah, it doesn't seem to be a steam cloud issue or a mod issue, which i guess are the usual suspects.

[Wariat117]

If your server is on different PC than client then no idea what could be the issue
(if it's rented then you need to take it to their support)
For server you don't need to login to steam -> I have heard that having steam client logged to steam account on PC with server might cause issues, but not sure about this



if you have client and server on the same PC then steam cloud tries to sync them both
but... steam cloud is only triggered by the client

so... server is running... you start game... steam cloud fails to sync server -> because it's in use already
and you fail it for few months...

and then server isn't running, but you start client -> it tries to sync server -> server's finally not in use, so it can sync -> files are different from cloud -> in normal games it asks you which files you want to use, but... valheim devs decided that cloud files are better so it downloads the few months outdates saves (backups are in cloud too, because of that once it syncs... the backups won't work)


edit:
https://store.steampowered.com/account/remotestorage
^ it's steam cloud
You can check if world from dedicated server is inside of valheim

[myianmonik]

I noticed that i recently have had some World Save issues too OP. Yesterday or the day before I put in a few hours of collecting stone. while doing it i accidentally released a trapped graydwarf i've had near by and had to kill him. The Next Day I didn't notice my storages to be very full, and the prisoner was still trapped... so i knew it didn't save for some reason but i didn't loose much... but It wasnt like Today, Where what happened compelled me to search up and look for similar problems :-/ anyways Today i had spend 2 hours building a fine bridge across some river, my game/ computer actually freezes, and my game went back many hours. maybe its bc of a recently thing they did.

TL;DR : A life was returned - proving the world saves arent working properly. A crucial infrastructure i built today was not saved by any means after a crash.

[Ghorlick]

I noticed today that all 4 of my worlds suffered this rollback issue. Entire buildings are gone. I don't have steam cloud enabled at all. And using the .old savefiles didn't do anything.

[Wariat117]

引用自 Ghorlick：

I noticed today that all 4 of my worlds suffered this rollback issue. Entire buildings are gone. I don't have steam cloud enabled at all. And using the .old savefiles didn't do anything.

without steam cloud it's impossible for game to rollback stuff far o-o
Game simply doesn't remember what was in the past, at best it could go back to last backup but not few months back etc

if not steam cloud then maybe onedrive? or other cloud service?
or the windows recovery system, it can revert files to previous versions, back to the last time file was recorded into the system

[Caramel]

引用自 Wariat117：

without steam cloud it's impossible for game to rollback stuff far o-o
Game simply doesn't remember what was in the past, at best it could go back to last backup but not few months back etc

May I ask for a source or how you know this? If I look at my local world safe files, their sizes range from 4mb to 18mb, with the worlds I played for longer being the bigger ones, giving me the impression that it is very well possible that some, or all older safe points are included in the newest one still. I didn't check the files, it's just a suspicion, but are you absolutely sure about that statement? Cause I am absolutely convinced that my file was NOT synced with any cloud service when I tried to restore it.

[Wariat117]

引用自 Caramel：

May I ask for a source or how you know this? If I look at my local world safe files, their sizes range from 4mb to 18mb, with the worlds I played for longer being the bigger ones, giving me the impression that it is very well possible that some, or all older safe points are included in the newest one still. I didn't check the files, it's just a suspicion, but are you absolutely sure about that statement? Cause I am absolutely convinced that my file was NOT synced with any cloud service when I tried to restore it.

all the stuff related to game runs in RAM
once game is turned off... some other program takes the space that was used by game and replace whatever the game had in it
also RAM cleans up each time you reset PC, so just turning on/off make everything go *puff*

the only way to persist anything between sessions is to save files on PC and read them on startup
and game only saves the files you see in the appdata/locallow it doesn't save other files

saving/autosaving works like this (it's from the game code):
1) create "new file"
2) save everything to new file
3) if backup exists then delete it
4) rename current save to backup
5) rename "new file" into current save

since backup is deleted the older stuff is lost



if game was rollbacking stuff...
then it would be at best back to backup, which is max 20min
reverting back months of progress is impossible
now that I think about this...
if there was program that prevents step 3) and 4) of save/autosave...
then backup could be older than 20min...
but, setting antivirus or other program to work like that would be weird o-O



when you say between 4mb to 18mb

you mean save itself is 18mb and backup of this save is 4mb?

or

save1 is 18mb, backup of save1 is 17mb
save2 is 4mb, backup of save2 is 4mb

because the second option is normal
I had worlds that were 100mb+ and worlds with only 20mb and their backup similar size, depending on how much I built

the first option where backup size is much different from save size... is not normal



also
devs configured steam cloud weirdly... it works totally different from other games
maybe it works even when disabled? (just random idea, no idea if it does)

as I mentioned
https://store.steampowered.com/account/remotestorage
there is steam cloud, you can find "valheim" and see if it has anything inside (it's alphabetically listed so valheim is at the bottom of list)

[myianmonik]

Do you think a VPN could mess with Cloud Syncs/ World Save issues? I don't really know about cloud saves 'n such

[Ghorlick]

引用自 Wariat117：

引用自 Caramel：

also
devs configured steam cloud weirdly... it works totally different from other games
maybe it works even when disabled? (just random idea, no idea if it does)

as I mentioned
https://store.steampowered.com/account/remotestorage
there is steam cloud, you can find "valheim" and see if it has anything inside (it's alphabetically listed so valheim is at the bottom of list)

That'd be my guess, that it's still using the cloud somehow. But I just checked the link you have and there's no Valheim at all for me. I have not a bloody clue what happened.