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duperemove

Finds duplicate filesystem extents and optionally schedule them for deduplication.

An extent is small part of a file inside the filesystem.

On some filesystems one extent can be referenced multiple times, when parts of the content of the files are identical.

More information.

• Search for duplicate extents in a directory and show them:

duperemove -r {path/to/directory}

• Deduplicate duplicate extents on a Btrfs or XFS (experimental) filesystem:

duperemove -r -d {path/to/directory}

• Use a hash file to store extent hashes (less memory usage and can be reused on subsequent runs):

duperemove -r -d --hashfile={path/to/hashfile} {path/to/directory}

• Limit I/O threads (for hashing and dedupe stage) and CPU threads (for duplicate extent finding stage):

duperemove -r -d --hashfile={path/to/hashfile} --io-threads={N} --cpu-threads={N} {path/to/directory}

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