Good point! You can reduce TTLs to such a point that the servers will become preoccupied with doing something other than providing answers. Ray
-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Daniel Karrenberg Sent: Thursday, July 22, 2004 3:12 AM To: Matt Larson Cc: nanog@merit.edu Subject: Re: VeriSign's rapid DNS updates in .com/.net
Matt, others,
I am a quite concerned about these zone update speed improvements because they are likely to result in considerable pressure to reduce TTLs **throughout the DNS** for little to no good reason.
It will not be long before the marketeers will discover that they do not deliver what they (implicitly) promise to customers in case of **changes and removals** rather than just additions to a zone.
Reducing TTLs across the board will be the obvious *soloution*.
Yet, the DNS architecture is built around effective caching!
Are we sure that the DNS as a whole will remain operational when (not if) this happens in a significant way?
Can we still mitigate that trend by education of marketeers and users?
Daniel