Backups are important, whether you are backing up your databases or your wedding pictures. The loss of data can ruin your day. While there is a huge list of backup software to choose from; some good, some not so good. One of the tools that I have used for years is rdiff-backup.
rdiff-backup is a rsync delta based backup tool that both stores a full mirror and incremental changes. It determines changes based on the rsync method of creating small delta files, which allows for rdiff-backup to restore files to any point in time (within the specified retention period).