But according to the article the regular desktop already has such a dedup system:
> If you put all this together, you end up in a place where so long as the client program (like /bin/cp) can issue the right copy offload call, and all the layers in between can translate it (eg the Window application does FSCTL_SRV_COPYCHUNK, which Samba converts to copy_file_range() and ships down to OpenZFS). And again, because there’s that clear and unambiguous signal that the data already exists and also it’s right there, OpenZFS can just bump the refcount in the BRT.
> If you put all this together, you end up in a place where so long as the client program (like /bin/cp) can issue the right copy offload call, and all the layers in between can translate it (eg the Window application does FSCTL_SRV_COPYCHUNK, which Samba converts to copy_file_range() and ships down to OpenZFS). And again, because there’s that clear and unambiguous signal that the data already exists and also it’s right there, OpenZFS can just bump the refcount in the BRT.