Re: [apps-discuss] [taugh.com-standards] Comments on draft-levine-orgboundary

["John R Levine" <[e-mail]>]

>> This argues for going back to the wildcard hack, with records like
>>
>>  *.ontario._ob.ca TXT "ontario.ca"
>>  *.toronto.ontario._ob.ca TXT "toronto.ontario.ca"
>>
>> These have lousy DNS cache behavior, but the closest encloser rule means
>> that you can find the cut point for any domain with one UDP lookup.
>
> Is there any hope that we could encourage implementers to cache these in
> the application, since they're likely to change only rarely anyway?

The lousy cache behavior is that every different name is a different 
lookup, even if it comes from the same wildcard, e.g., foo.com, 
www.foo.com, bar.com, www.bar.com, etc.  Repeated queries for the same 
name cache just fine, give or take the cache being too small.

The question is whether the rate at which hosts look for these things will 
be high enough to matter.  It seems unlikely they'd be as frequent as rDNS 
queries, and those cache just as badly.

Regards,
John Levine, [e-mail], Taughannock Networks, Trumansburg NY
"I dropped the toothpaste", said Tom, crestfallenly.