[Seaside] Amazon EC2
Avi Bryant
avi.bryant at gmail.com
Fri Sep 8 16:42:09 UTC 2006
On Sep 7, 2006, at 11:06 AM, Jason Johnson wrote:
>
> Right, but what I am saying is, the users (e.g. AOL users) are
> using some ISP for internet access. When they try to hit your
> page, their PC sends a DNS request to whoever it's configured for,
> which will be the ISP (e.g. AOL) servers. The ISP servers will ask
> the root servers, find you and give the answer, but they (or they
> used to) ignore the TTL field. They just run a modified version of
> BIND or whatever with the cache time hard coded to 2 days. So for
> the next 2 days all users that use the effected ISP server will hit
> that cache. That wouldn't mean all of AOL for example, but some
> percentage.
>
> Now I don't know how systems that us Dynamic DNS are getting around
> this, but I guess they are so it probably wont be a problem. All I
> know is I changed over my domain some months back and I couldn't
> get to my site for 2 days by name because of it.
>
> If this reminder is irrelevant for whatever reason, I apologize. I
> was trained for nearly a decade to point such things out. :)
No, thanks for explaining, I understand now. That seems like
obnoxious behavior on the part of AOL, but it would definitely pose a
problem for the strategy I proposed. Does anyone have any more data
on whether this still happens and how DynDNS etc get around it (if
they do)?
Avi
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