I don't think so, for a few reasons: - My primary need for it is on my backup box, which does "rsync --inplace" to keep small changes to large files from compl

I don't think so, for a few reasons: - My primary need for it is on my backup box, which does "rsync --inplace" to keep small changes to large files from completely creating a new copy of that file every backup run. Hardlinks would cause all of those to compete if some previously similar file started getting updated (OS updates or similar starting files that then diverge. - Each system gets it's own ZFS, so I can snapshot them at the end of the backup, keep different retention times, etc. But I can't hardlink across filesystems, I don't think. The linked article did mention increasing dedup block size, which might help. If I could even cut down the DDT by half, that would make it more doable.