Can bind be configured to not drop RR's from the cache when the upstream DNS server is unresponsive

Alan Clegg alan at
Thu Mar 17 14:20:29 UTC 2016

On 3/17/16, 10:15 AM, "Ron" <bind-users-bounces at on behalf of
ron.arts at> wrote:

> According to the BIND9 docs:
> cleaning-interval This interval is effectively obsolete. Previously, the
>server would remove
> expired resource records from the cache every cleaning-interval minutes.
>BIND 9 now
> manages cache memory in a more sophisticated manner and does not rely on
>the periodic
> cleaning any more. Specifying this option therefore has no effect on the
>server¹s behavior.

This is about data in cache that is expired.  BIND never served expired
data to query requests.

I can definitely see how this could be confused, however.  Good catch.


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