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Re: [sig-dns]progressing the APNIC Lame DNS sweep proposal
Hi Ed!
On Tuesday, Apr 29, 2003, at 09:25 Canada/Eastern, Edward Lewis wrote:
First question I use: is the effort to reduce lameness targetting to
reduce the load on the infrastructure servers (root, TLDs, etc.) or to
make the overall DNS function better?
The goals in George's document are to reduce the load on the root
nameservers, and on other nameservers near the root in the delegation
path for in-addr.arpa and ip6.arpa, and also to improve performance for
resolvers looking things up under those domains.
He suggests that both these goals can be accommodated by removing the
delegation in cases where delegated nameservers are unreachable,
thereby returning a fast NXDOMAIN to a resolver rather than waiting for
a slow timeout from an unreachable nameserver; negative response
caching should reduce the query load on the roots.
This is based on a single "lameness" criterion of "delegated nameserver
is unreachable".
Your phrase "make the overall DNS function better" sounds like George's
goal, but it also has connotations of "make the overall DNS more
accurate". If accuracy is our goal, then we might reasonably extend
George's "lameness" criterion to include nameservers which return
inappropriate information (e.g. they send NXDOMAIN in response to an
SOA query for a zone they should report authoritatively for).
By 'a delegation' do you mean that which is represented by the NS RR
set for a child zone registered at the parent? (As opposed to being
an individual NS RR, an address off an NS RR, or even the
authoritative set of servers at the child.)
Yes.
Opinions from the list on these two questions would be very good to
hear.
Remember, Joe, "vengeful." ;)
I am quaking with fear :-)
Joe
