[Pdns-users] Automatically delete zones that are deleted on Supermaster

Klaus Darilion klaus.mailinglists at pernau.at
Fri Nov 9 14:04:19 UTC 2012

On 08.11.2012 22:48, a b wrote:
>  > Using purely DNS for zone replication (supermaster) is nice and sounds
>  > great, but also has disadvantages, e.g. it is not reliable: If the
>  > NOTIFY could not be delivered to the slave, then the slave is
>  > inconsistent. So, you need another mechanism to verify and update slaves
>  > which failed to receive the NOTIFY.
> Does this scenario not hold true for any distributed service which
> relies on network connectivity?

Sure, but the difference is when the failure (e.g. slave down or network 
down) is resolved. If you rely on NOTIFYs then you need an external 
process which compares the name servers and triggers NOTIFYs for missed 
zones. When you use for example a DB-replication mechanism, the 
replication mechanism usually automatically re-syncs to the master.


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