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photon · 07-23-2009, 03:50 PM

http://support.easydns.com/Failoverfaq.php

DNS changes aren't instant and aren't 100% reliable either; not everyone obeys the ttl. I've read that most providers won't even obey a ttl of less than half an hour I think, so half an hour is kind of the minimum amount of downtime you will see with this kind of solution. Plus having a low ttl means more DNS requests which means more expensive DNS.

So the question is how much downtime is acceptable?

07-23-2009, 03:50 PM	#5
photon The new goggles also do nothing. Join Date: Oct 2001 Location: Calgary Exp:	http://support.easydns.com/Failoverfaq.php DNS changes aren't instant and aren't 100% reliable either; not everyone obeys the ttl. I've read that most providers won't even obey a ttl of less than half an hour I think, so half an hour is kind of the minimum amount of downtime you will see with this kind of solution. Plus having a low ttl means more DNS requests which means more expensive DNS. So the question is how much downtime is acceptable? __________________ Uncertainty is an uncomfortable position. But certainty is an absurd one.