VeriSign's rapid DNS updates in .com/.net

Thu Jul 22 19:18:35 UTC 2004


----- Original Message ----- 
From: "Daniel Karrenberg" <daniel.karrenberg at ripe.net>
To: "Paul Vixie" <vixie at vix.com>
Cc: <nanog at merit.edu>
Sent: Thursday, July 22, 2004 3:05 PM
Subject: Re: VeriSign's rapid DNS updates in .com/.net


>
> On 22.07 17:08, Paul Vixie wrote:
> >
> > ....  therefore if there were a drop in TTL for root-zone data, it would
> > only be a multiplier against 2.1% of f-root's present volume.
>
> I am not worried so much about the root servers here because of the
> reasons you cite. The root server system is engineered to cope with
> hugely excessive loads already.
> I am worried about all the other root servers that have to deal with
> much lesser query loads and might feel the impact of lowered TTLs
> much more.
>
> > ... and the impact of
> > having it in many TLD's will be to put downward pressure on TTL's.  this
> > all needs to be looked at very carefully.
>
> Yes, we need to keep an eye on this and argue against lowering TTLs
> across the board for little good reasion.
>
>
Infospace / Authorize Net and their successors have their ttl's set for 10
minutes and that just plain goofy. Plus, TTL's at 600 or below have always
been the calling card for a spammer; . . . er not that I am accusing them of
spamming, rather they are just straining dns queries.

Peter