barmar at alum.mit.edu
Sat Dec 4 21:45:56 UTC 2010
In article <mailman.927.1291478928.555.bind-users at lists.isc.org>,
Benny Pedersen <me at junc.org> wrote:
> i like to have bind cache in 43200 secs for any zone and update only
> if soa changes in that time, how do i configure named.conf to do this ?
> negative cache i like to have as the zone says in ttl, so just 43200
> on positive
You can't. You can configure a max cache time, but not a minimum.
Why do you think this is a good idea? With your method, it would have
to do two queries whenever a record's TTL has expired: first check the
SOA to see if it has changed, then query the record. The standard
algorithm just queries for the record you want.
Barry Margolin, barmar at alum.mit.edu
*** PLEASE don't copy me on replies, I'll read them in the group ***
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