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Utilizing filesystem copy-on-write capabilities to share data blocks between identical files.
Distinct from Copy-on-Write Filesystems: Candidates focus on filesystems or virtualization formats, not a tool that applies reflinks to existing files for space reclamation.
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fclones is a command-line tool designed to locate identical files across a filesystem by comparing file sizes and cryptographic hashes. It functions as a parallel filesystem scanner and a deduplication utility that identifies duplicate files to reclaim disk space. The tool distinguishes itself through a persistent hash cache system that stores hashes and metadata on disk to accelerate repeated scans. It employs a multi-phase scanning process and device-aware parallel I/O, which adjusts thread pools based on whether the storage is an SSD or HDD to maximize throughput. Beyond discovery, the pr
Reclaims disk space by using filesystem reflinks to share data blocks between duplicate files.