Hello, I've created some tools to work with reflinks (FICLONERANGE) / copy_file_range(2).
Reflinks can be used to share equal blocks between files. Cloning a block using reflinks will not copy any data saving I/O and disk wear/ space. I use these tools to construct new files from blocks in existing files, The only tool that comes close to copying file ranges is dd but I don't think it allows you to specify multiple file ranges per execution. Currently I've proposed to get copyfilerange added to util-linux: https://github.com/util-linux/util-linux/pull/3947 https://github.com/util-linux/util-linux/compare/master...meeuw:util-linux:copyfilerange.patch Would coreutils be a better fit for such a tool or can an existing tool be extended to share equal blocks between files? greetings, Dick Marinus
