> On Dec 8, 2004, at 11:37 AM, David Carmean wrote:
>
> > On Wed, Dec 08, 2004 at 05:31:18PM +0000, Paul Vixie wrote:
> >
> >> Certainly F has always allowed zone transfers of the root zone, even
> >> when
> >> it was called NS.ISC.ORG back before the letter-names came into
> >> being. It
> >> is ISC's intention to permit AXFR of the root zone from f-root,
> >> always.

> >
> > What are your thoughts as a root server operator about this as a
> > technique
> > to reduce the load on the roots?

>
> Remember that all you are going to see is the delegation for the top
> level domains.
>
> For example, you would see that the ".com" domain is delegated to
> "[a-m].gtld-servers.net". You would not be obtaining the ".com" zone
> delegations this way, which seems to be the desire to help "reduce the
> load on the roots".
>
> This really wouldn't reduce the load very much because as soon as you
> were to query a root server for any ".com" hostname, the delegated
> servers for the ".com" zone would be returned to you and then cached
> for 172800 seconds, or two days, at which time you would have to
> perform the query again against one of the root servers. You would be
> cutting down from one query for each TLD every two days by performing a
> zone transfer, which you would need to do periodically anyway.
>
> Which one is "better"?
>
> Bill Larson


It's not so much about referrals to the TLDs as is it is
about all the NXDOMAIN responses.

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org