We can use the --bwlimit to limit the bandwidth being used by the rsync command. Here is an example which transfer the local files to a remote server using ssh+rysnc.

rsync --bwlimit=100 -v -e ssh /home/ykyuen/* ykyuen@remote-server:/home/ykyuen/

The bandwidth is limited to 100kb/s.

Done =)

Reference:

• Keep rsync From Using All Your Bandwidth
• nixCraft