[146139] in North American Network Operators' Group
Re: Performance Issues - PTR Records
daemon@ATHENA.MIT.EDU (Jimmy Hess)
Fri Nov 4 20:26:55 2011
In-Reply-To: <20111104162814.24EFAC0DC81@fafnir.remote.dragon.net>
Date: Fri, 4 Nov 2011 19:26:02 -0500
From: Jimmy Hess <mysidia@gmail.com>
To: Paul Ebersman <list-nanog2@dragon.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Nov 4, 2011 at 11:28 AM, Paul Ebersman <list-nanog2@dragon.net> wrote:
> It's already been pointed out that lame delegations are more likely
> problems for many. But the "we'll just pre-fill in-addr to avoid
> problems" isn't going to work for ip6.arpa. If anyone has enough
> hardware to serve the zone for a /48 (64k * 4bil * 4bil *
> bytes-in-record), I'd love to see it. :)
[snip]
I can serve the zone for a /48 by creating a "sparse" zone.
That is... when you ask my DNS server what such and such PTR reverses too,
what I don't have a DNS entry for, it can tell you something generic.
There is no need for me to physically create 64k*4bil*4bil on a disk
or memory area
somewhere. I can make a plugin for my DNS server to hand you the
generic result
when you ask my DNS server what something reverses to...
That is, I can serve you an ephemeral record without requiring an
extra byte of storage beyond
the life of your query :)
--
-JH
