Disk usage and ZFS deduplication

[Per von Zweigbergk]

14 jun 2011 kl. 17.15 skrev Šimun Mikecin:

> What about hard linked files? They are similar to dedup in this regard.

I know that a hard linked file will show the same disk usage, so if for example:

$ du a
12345 a
$ ln a b
$ du a b
12345 a
12345 b
$

But in this case it's not the entire file being hardlinked, rather just some parts of the file being deduplicated so it's not exactly the same. Or is it? This is why I asked on the mailing list. :-)