Fastest rsync I ever know

copy_files.sh

#!/bin/bash
tar cf - * | mbuffer -m 1024M | ssh -i ~/.ssh/<key.pem> <destination_ip> '(cd /home/ubuntu/<destination_folder>; tar xf -)'

rsync-out.sh

#!/bin/bash
rsync -aHAXxv                                                 \
--exclude /server/dump.rdb                                    \
--numeric-ids                                                 \
--delete --progress                                           \
-e "ssh -T -c arcfour -o Compression=no -x"                   \
/what usern@where:/folder