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  • The file system is bound to store some metadata, but why does it matter or why would you want to optimize the size of that? 34MB per 54,000 links is nothing on today's hard drives. Commented Jul 12, 2015 at 20:42
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    What exactly is your question? You don't mention how you calculated the use space or what file system you are using so it's not clear whether you did something wrong. 600 bytes sounds a little big for meta data but it's not crazy. Commented Jul 12, 2015 at 20:53
  • How long are the file names? Commented Jul 12, 2015 at 21:31
  • If you want to investigate this yourself, you might want to run some more tests to see how your disk usage grows with the amount of hardlinks you've got. The growth might not be linear and there might be jumps in which case division might not make sense. Commented Jul 13, 2015 at 0:10