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DVC (Data Version Control) is a tool that can easily rearrange data files quickly and efficiently in machine learning projects. DVC's secret to rearranging data and model files is to link files rather than copy them. Linking a file, like DVC does, is incredibly fast, making it possible to rearrange any amount of files in the blink of an eye, while avoiding copying, thus saving disk space. A new type of link, the Reflink (copy-write), is available in newer releases of Mac OS X and Linux.