[dns-wg] Re: Elimination of 2nd level ccTLD domain names

[Stephane Bortzmeyer <]

On Mon, Oct 25, 2004 at 04:29:39PM +0200,
 Brad Knowles brad@localhost wrote 
 a message of 63 lines which said:

> It [NSD] pre-calculates all possible questions and all possible
> answers before it loads the zone(s), and then creates a jump table.

It is not entirely true since version 2.0 (ns2.nic.fr runs 2.1.2). It
was the original algorithm but it was changed to accomodate DNSsec
where a default reply of NXDOMAIN (for every domain not found in the
jump table) was not a proper reply.

See http://www.nlnetlabs.nl/nsd/

> I remember at RIPE 44 that we got a report from the folks up at
> SUNET, who had tried using NSD to serve the ccTLDs they handle, and
> even though it was a monster machine with many gigabytes of memory,
> that still wasn't enough.

ns2.nic.fr is a secondary of ".nl" (the largest zone it serves) and of
many in-addr.arpa subdomains and ccTLDs. It serves twelve millions
records. Here it is (see VSZ and RSS for its memory consumption):

USER        PID %CPU %MEM   VSZ  RSS TTY      S    STARTED         TIME COMMAND
nsd      209888  1.7 18.4  669M 564M ??       R    15:26:03     0:22.27 /usr/local/sbin/nsd -a 192.93.0.4 -a 2001:660:3005:1::1:2 -n 4