Recursion vs Redirection

[Eric Dean <eric@crystalballinc.com>]

A few months ago, I mentioned the concept of using a recursive DNS query
for CDI rather than CNAMEs.  CNAMEs create problems whereby a peered CDN
experiencing QoS problems can adversely affect content requests until a
TTL expiration occurs.  This can create apprehension when a CDN operator 
does not have strict control of a publisher's content.

However, CDI via recursive DNS queries that transpose the client's IP
address into the additional section preserves all CDN request routing
information while providing a different level of administrative control.

  
Eric Dean
President, Crystal Ball Inc.
W 703-322-8000
F 703-322-8010 
M 703-597-6921