[94320] in North American Network Operators' Group
DNS Query Question
daemon@ATHENA.MIT.EDU (Dennis Dayman)
Thu Jan 18 12:40:19 2007
Date: Thu, 18 Jan 2007 11:39:17 -0600
From: Dennis Dayman <dennis@thenose.net>
To: Nanog <nanog@merit.edu>
X-Envelope-From: dennis@thenose.net
X-MDaemon-Deliver-To: nanog@merit.edu
Errors-To: owner-nanog@merit.edu
I have a customer having some DNS issues. They have done some research
regarding some DNS timeout errors they saw with Verizon's sender verify
looking up their MX records. What they have discovered is their current
DNS service has a 1% failure/timeout rate. They are exploring other
vendors (UltraDNS for one), but need an estimate of the number of DNS
queries for accurate pricing to put together a ROI argument for the
switch.
I have no IDEA if this can be determined, but what is a good estimate of
the number of DNS queries generated from sending an email? I know that
it may differ from ISP to ISP, but they just need a rough number for
pricing purposes.
If you also happen to know how many DNS requests make it to the root
server (rather than a cached proxy out on the net), that would be great.
-Dennis
