pdumpfs is a simple daily backup system similar to Plan9's dumpfs which preserves every daily snapshot. pdumpfs is written in Ruby. You can access the past snapshots at any time for retrieving a certain day's file.
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The options --quiet (-q) and --dry-run (-n) have been added. The 31 days limit of finding the last backup for incremental backup has been abolished. A 'latest' symbolic link referring to the latest backup is created. Other small modifications has been made.