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Originally shared on Hacker News

Deduplicating copy utility

This utility copies files while deduplicating on the fly, even when the source and destination filesystem structures differ. Detected duplicates can either be omitted or replaced with hard/soft links to files in one or more reference locations, enabling merging and efficient consolidation of multiple hard drives holding partial backups (e.g. photos and music), maintaining complete source trees on a single destination, or copying only new files.

Last shared
01 / The problem

What it addresses

Many deduplication utilities rely on files being on the same filesystem or having the same structure.

02 / Source history

Shared over time

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  1. Deduplicating copy utility

    This utility copies files while deduplicating on the fly, even when the source and destination filesystem structures differ. Detected duplicates can either be omitted or replaced with hard/soft links to files in one or more reference locations, enabling merging and efficient consolidation of multiple hard drives holding partial backups (e.g. photos and music), maintaining complete source trees on a single destination, or copying only new files.

    Problem: Many deduplication utilities rely on files being on the same filesystem or having the same structure.

    Posted by @publlus_enigma · Original comment ↗

    “A copy utility that can efficiently deduplicate as it copies, even when the filesystem structure is different. Whilst there are many utilities that can deduplicate, they often either rely on files being on the same filesystem, or having the same structure. If a duplicate is detected, it can either be omitted or hard/soft links created to files in one or more reference locations.”