hi, I'm trying to send a snapshot from a freebsd 13.2 server to an omnios server running r151044p, and I assume when it's trying to send the first dataset it errors out with "internal error: Invalid argument" and "warning: cannot send 'pool/dataset@send': signal received"

patrikr: it's likely the version of openzfs your freebsd server is using is incompatible with the version we have in omnios. Openzfs has a lot of changes that don't yet exist in illumos

Long ago there was talk on the openzfs meetings of a limited property set that would allow people to transfer filesystems between linux, freebsd, and illumos. I don't think anyone ever worked on it.

that's fair enough, at least nfs mounting and copying the files over works that way so it's no big deal

just unfortunate

I've never bothered to check if rsync | ssh or nfs+rsync is faster. I know tar | ssh is fastest but it has to be in the right context.

For higher latency links I'm also pretty happy with lftp (which speaks sftp) and supports parallel transfers