Server load balancing techniques of commercial web sites..

[cheaney Chen <cheaney.chen@xxxxxxxxx>]

Hi,

  There are a lot of different kinds of SLB techniques, ex. DNS-based,
Dispatcher-based(like LVS), and server-based , etc.
  And my question is, for a commercial web site (like yahoo or ...)
how to do SLB.
  What methods are used to handle huge numbers of client's requests?
Combination of SLB techniques above , or ... ?!

  Thanks for your reading.

cheaney