Cannot copy directory metadata errors? Hardlink errors?

general discussion
1

I am currently investigating backup solutions and have decided to give urbackup a go and it looks quite promising so far (client/server model, restore via web-UI, compression & deduplication).

However, after setting up two backup jobs (one linux, one Win10 to an Ubuntu fileserver via SMB) I see a multitude of errors, which I cannot solve or even understand:

  • Cannot copy directory metadata from "/backups/machine1/201109-1057/.hashes/user/AppData/Local/Keypirinha/default/App/.dir_metadata" to "/backups/machine1/201109-1517/.hashes/user/AppData/Local/Keypirinha/default/App/.dir_metadata". - No such file or directory (errorcode=2)
  • More warnings of kind: Creating hardlink from "/backups/machine1/201109-1057/user/.config/scoop/config.json" to "/backups/machine1/201109-1517/userr/.config/scoop/config.json" failed. Loading file... Skipping.

Any idea what could cause these errors and how I could solve them?

Additionally, sometimes, during a backup, the no. of “files in queue” is climbing instead of decreasing and the amount that was backed up seems to be miscalculated (higher number on the left). Is this normal?

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urbackup is used as a docker image (2.4.13) on an ubuntu 20.04LTS server, storage is provided by a TrueNAS server shared as SMB. Both clients show these errors (the hardlink one more with the windows client) and both are the latest version (2.4.10 on linux & windows).

2

The question would be what happend to e.g. /backups/machine1/201109-1057/user/.config/scoop/config.json. Maybe look at the logs w.r.t. to that?

3

Actually, the hardlink error apparently solved itself after some restarts. Still don’t know what caused it but I am happy that it worked. :slightly_smiling_face:

Two other things popped up though (it always does, doesn’t it)

  • A backup is stopped/marked as failed because on the source file system (ext4) there are two files that only differ in case (“iLO” & “ILO”) and UrBackup throws an error ("Creating directory "/backups/machine1/201116-2225/[...]/iLO" failed. File exists (errorcode=17)").
    The file exists most probably because the target file system (ZFS shared via SMB) does not support identical file names with different cases.

How should I proceed in such cases (no pun intended)? This time I could delete it because the file/folder was a duplicate anyway, but what to do if this happens with crucial files? Change to a better file system? I could probably share the target folder from ZFS as NFS, but normally that causes more problems… :scream:

  • Second error is: Writing metadata to /backups/machine1/201116-2232/.hashes/opt/tiddly_kingmaker/mywiki/tiddlers/$__trashbin_test.json.meta failed

For the second one I have no idea what is causing this.

4

You should have gotten a big red warning for that on the status screen with a nice explanation why this problem exists.

5

Hmm… which error are you referring to? Actually I did not see anything, it just said “No recent backups” in red and the rest was in the error logs.

6

This one: