Re: [cobalt-users] Adjusting TTL for domain change

[Brent Sims <bs@xxxxxxxxxxx>]

On Sat, 15 Sep 2001, Jeff Lasman wrote:

} Okay, I'm going now to set some of my TTLs to one minute; I've moved a
} server but now I'm renumbering it to new space (they agreed to give us
} enough contiguous IP#s for the Raq but only in a new C-Class).  So when
} can I change this and still be ok with AOL? <smile>

As I said, that's the trick :-) What we do is check the logs for the
most popular site (traffic) in the group we're moving. You should be
able to determine roughly (get an idea of) how often AOL's proxy
comes along with a simple grep. We try to roll before it comes back
but I don't know how things are there but around here weekend
traffic is lowest so swaping during the lull is the priority.

	I can't say this has been scientifically proven but we
sometimes have a few AOL users surf the sites after the roll in the
hope that such will push the proxy along.

	For the most part our experience is that most US users will
see the new pages immediately if we roll around 1:00AM Saturday
morning. AOL users may or not but they usually will by Monday even
in the worse event.

	I went back through our records as we're getting ready to do
this again pretty soon. Out of three full rolls, name servers and
hosts, we only had one complaint and that turned out to be the
result of our neglecting to change the IP address on a httpd
redirect. We simply forgot it. The site owner called and we changed
it while he was on the phone and he was able to access it before we
hung up.

	Everytime we do this I get all stressed out but we've
honestly had no problems worth mentioning.

	Peace be with you,

	Brent Sims
	WebOkay Internet Services, LLC
	http://www.WebOkay.net
	mailto: Brent@xxxxxxxxxxx
	(719) 595-1427 (Voice/Fax)