How to mirror a site?

Hi,
Just wondering how web giants mirror their sites at various locations including DB? How they serve pages from different locations by a single url? How they route traffic as they desired?

Please give some hints/good links..
thanks,

Here is an example of setup a local mirror server
http://howtoforge.com/mirroring_with_rsync

Here is another from PHP.NET
http://us2.php.net/mirroring.php

Another example of how to set one up for FreeBSD
http://www.freebsddiary.org/mirror.php

see this website to see if can help you :


http://www.mostsoftware.net