Dynamically Reducing TTL of few selected ResourceRecords
Barry Margolin
barmar at alum.mit.edu
Mon Oct 1 01:07:56 UTC 2012
In article <mailman.329.1349051635.11945.bind-users at lists.isc.org>,
blrmaani <blrmaani at gmail.com> wrote:
> Our development team complains about waiting for an hour for the deleted
> resource records to disappear from recursive resolver cache.
>
> I thought of changing the $TTL value to 1 for that zone but realize that its
> not efficient.
>
> Are there any BIND specific options to support this? I know I can have a cron
> to flush cache of selected records, but a BIND option to support this would
> be nice..
Each record can have an explicit TTL, e.g.
www 300 IN A 1.2.3.4
sets the TTL of the www record to 300 seconds. $TTL is just the default
for records with no explicit TTL (which in most zone files is all of
them).
--
Barry Margolin
Arlington, MA
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