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

[Henry Linneweh <hrlinneweh () sbcglobal net>]

Before a big panic starts, they can restore it back to
the way it was if there is an event of such proportion
to totally hoze the entire network or any major
portion of it, until they fix any major issue with
these changes....

-Henry

--- Sam Stickland <sam_ml () spacething org> wrote:
> Well, a naive calculation, based on reducing the TTL
> to 15 mins from 24
> hours to match Verisign's new update times, would
> suggest that the number
> of queries would increase by (24 * 60) / 15 = 96
> times? (or twice that if 
> you factor in for the Nyquist interval).
>
> Any there any resources out there there that have
> information on global 
> DNS statistics? ie. the average TTL currently in
> use.
>
> But I guess it remains to be seen if this will have
> a knock on effect like 
> that described below. Verisign are only doing this
> for the nameserver 
> records at present time - it just depends on whether
> expection for such 
> rapid changes gets pushed on down.
>
> Sam
>
> On Thu, 22 Jul 2004, Ray Plzak wrote:
>
> > Good point!  You can reduce TTLs to such a point
> that the servers will
> > become preoccupied with doing something other than
> providing answers.
> > Ray
> >
> > > -----Original Message-----
> > > From: owner-nanog () merit edu
> [mailto:owner-nanog () merit edu] On Behalf Of
> > > Daniel Karrenberg
> > > Sent: Thursday, July 22, 2004 3:12 AM
> > > To: Matt Larson
> > > Cc: nanog () merit edu
> > > Subject: Re: VeriSign's rapid DNS updates in
> .com/.net
> > > Matt, others,
> > >
> > > I am a quite concerned about these zone update
> speed improvements
> > > because they are likely to result in
> considerable pressure to reduce
> > > TTLs **throughout the DNS** for little to no
> good reason.
> > > It will not be long before the marketeers will
> discover that they do not
> > > deliver what they (implicitly) promise to
> customers in case of **changes
> > > and removals** rather than just additions to a
> zone.
> > > Reducing TTLs across the board will be the
> obvious *soloution*.
> > > Yet, the DNS architecture is built around
> effective caching!
> > > Are we sure that the DNS as a whole will remain
> operational when
> > > (not if) this happens in a significant way?
> > >
> > > Can we still mitigate that trend by education of
> marketeers and users?
> > > Daniel