On Wed, Feb 21, 2024 at 12:21:05PM +1100, Keith Bainbridge wrote: > > On 21/2/24 10:47, Felix Miata wrote: > > I didn't think so, which begs the question why OP Keith is using it. :p > > -- > > I read somewhere about 2 years ago, that it automagically de-duped data > when it detected I was copying the same file to different directories [...] I think the Wikipedia [1] is a good ref, at least at the level we are discussing. Deduplication is mentioned there requiring userspace tools, so it seems you'll have to run a process (as a daemon, from cron, whatever) to achieve that. It also mentions "reflinks", which is a kind of COW file copy (not to be confused with a hardlink, which all civilised file systems have). Cheers [1] https://en.wikipedia.org/wiki/Btrfs#List_of_features -- t
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