[dns-wg] Question about use of cname in Google's services

Hello everyone



Someone asked me question on why google uses cname for their services
anyways? I mean I get it that for Google Apps customers it makes sense to
have mail.domain.com pointed to a cname rather then A record to a host
which may die.


But why for their own services? Like e.g "mail.google.com" is cname to
googlemail.l.google.com. and googlemail.l.google.com. eventually returns A
record. This adds up one extra step in resolution and I wonder why Google
does it this way? What advantage they get ? or What advantage they miss if
they simply return record which I am getting for googlemail.l.google.com.
directly as A record for mail.google.com ?



Curious to hear your thoughts.



Thanks!

-- 


Anurag Bhatia
anuragbhatia.com
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