I wanted to work on removing the unwanted files from the backup. For this I have listed all files with Duplicati-CommandLine find ... –all-versions=true. Strangely, paths like c:\windows or d:\vitual machines are not included in the list, although they were definitely listed as files currently being backed up in the above backup job. Also, the backup files are larger than usual.
Therefore I used Duplicati-CommandLine find ... -version=X *.* >filelist-versionX.txt to create and compare different file lists before and after the update. There are several files which suddenly have a different size but have to be unchanged in any case! This can be easily traced, for example, by looking at text files (logs) or images. I randomly restored and looked at some of these files with wrong file sizes. The content is from other files! - usually from the same directory.
So, the backup sets are no longer trustworthy for me since the update to 2.0.3.9 (or 2.0.3.8?), when --snapshot-policy=On is used.
I am not yet very firm with the Duplicati.CommandLine. With the parameter purge --version=X *.* I can probably remove all files of a backup set. Is there a better method to remove a complete backup set?