How does Google Global Cache selects which cache to redirect a client?

["Nathanael C. Cariaga" <nccariaga () stluke com ph>]

Hi,

Just wondering if anyone here I can discuss offline about Google Global 
Cache?  I am interested in knowing how does the cache selection process 
takes place (i.e. how does Google know to which cache to redirect a 
client).  I would also like to know what if I have 2 upstreams who both 
have GGCs installed in their network, how would the selection process 
takes place.

Thank you very much in advance.


Regards,

--
-nathan