I wonder why nobody has yet mentioned rdiff-backup. It combines
browsable directories with multiple versions - the version data is
stored in a separate rdiff-backup-data subdirectory (one per backup task).
One downside is that rdiff-backup causes a lot of network traffic. For
that reason I currently use rsync to copy over network, and then I use
rdiff-backup locally to create a repository with multiple versions.
Another system that we use is rdiffweb. It uses rdiff-backup over
network and adds a web interface for clients to browse and restore files
or directories. I did not personally set it up, but it seems to work fine.
- Jussi
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