On 29 Sep 2015, at 2:20, Shane Kerr wrote:
Jiankang Yao,
I think a simpler approach that works in general is the "HAMMER"
approach proposed by Warren Kumari, Roy Arends, and Suzanne Woolf a
couple of years ago:
https://tools.ietf.org/html/draft-wkumari-dnsop-hammer
A huge +1 to this. The proposal in draft-yao-dnsop-root-cache has many
stability and operational issues that could cause failures, where as
"look in your cache and fetch things a bit before they expire" has none,
even if you don't do it right.
The approach you propose will have some small advantage if someone
queries for an entry in the root zone that is not in cache. However
given the long TTL of root zone entries, such a query will be rare so
the benefit is quite small.
Yes, exactly.
--Paul Hoffman
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