I found out that trying to synchronize a huge folder is a bad idea. Because errors occur over and over again - I’ve been working with the software since day one.
It is better and safer to synchronize the data folder by folder and not all at once.
So I will have to move everything to another location, readd the folder and then add single Folders one by one? This is gonna take very long since most folders are giant project folders with loads of files in them.
I will wait until the current operation finished and checkl if it succeeded. If not, I will probably have to try this option.
There are so many clients that do exactly the same - sync to cloud storage. I have never seen one that messes everything up like this. Even OneDrive can at least tell, which files are actually up to date.
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Not single one by one but subfolder by subfolder. Not too much at once, then you are on the safe side, as experience shows.
The client app is still busy.
The number of files increased while the total size went down. The upload seems to have restarted at some point last night.
It is unfortunate that this process is so slow. Every ~25 sec. the files counts up by 100. At this pace, this will take about 4 hours. I suppose it will then restart and grab more files.
Is there a way to make the client process more files at once?
So after waiting for thje client to finish syncing, this is the result:
Meanwhile the client says, everything is synced:
So what now?
Okay, so what I found now:
If i rename a folder or file that shows the ‘syncing icon’ by e.g. by appending a character, the client updates all the files on the server and everything looks correct.
But as soon as I rename the folder or file back to the original name, it updates again but keeps showing the ‘syncing icon’.
So the folders and files having this problem must be in a list somewhere that tells the client, it is updating these though it is not.
Where could this be and would it be possible to remove the entries?
So I have now tried many things. In the end I removed the folder sync., uninstalled the client app, deleted the whole local folder, rebooted the system, reinstalled the client, rebooted again, rebooted the server and startet the sync.
Unfortunately this didn’t help. The same folders are marked as being synced.
One day later: Some subfolders changed their icons from syncing to cloud. Not sure why and especially not why only some of them. This is so strange and makes it very difficult to trust the system.
It is possible that temporary files from failed upload attempts remain on the server, which could be causing issues with subsequent uploads. I recommend checking for such temporary files on the server and removing them if they exist.
After cleaning up, it’s a good idea to run a file rescan to synchronize the Nextcloud database with the actual storage state. If you are using Nextcloud AIO, you can use the following command:
sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ files:scan-app-data && \
sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ files:scan --all
If you are using a different installation type, the command may vary, but the principle remains the same—remove any incomplete files and then sync the database with the disk state.
I had a similar issue in the past when running Nextcloud on an Ubuntu Server in a Proxmox environment. The server crashed due to memory overflow when uploading large files. However, after optimizing the system settings, the problem was resolved, and everything has been running smoothly since then.
Try this approach and let me know if it improves the situation.
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