bandwidth throttle software

I run a backup script called /root/backup.sh which runs rsync command. However, rsync makes a lots of disk I/O and network I/O. I would like to reduce both disk and network I/O. My server has 10Mbps server connection with 160GB SATA hard disk. How do I reduce disk I/O so that the entire system does not die or become unresponsive?

{ 6 comments }