sudo ionice -c 3 rsync -n -av \
-e "ssh -c arcfour -l nicolaw -i /home/nicolaw/.ssh/id_rsa" \
--protocol=29 \
--remove-source-files \
--delete-after \
--size-only \
--progress \
--rsync-path="sudo ionice -c 3 rsync" \
host:/src/path /dest/path