[Pdns-users] MySQL backend and notify

Ton van Rosmalen ton at netbase.nl
Thu Aug 12 05:46:19 UTC 2010


Yves Goergen schreef:
> On 12.08.2010 00:11 CE(S)T, LikeFiction wrote:
>> If PowerDNS finds that a SOA record 
>> contains a higher value than this "notified_serial", it knows it has to 
>> send out an update to the slaves.
> Yes, but the question is how does it find that? The database won't tell
> its connected clients (here the pdns-server) that some data has changed.
> Will pdsn query the database every few seconds or will I have to tell
> pdns with a special command that the serial (and thus the data) of a
> zone has changed?
The slaves check on a regular interval whether the master has an updated
serial in the SOA.
If a higher serial exists this is detected and the zone is transferred
to the slave.



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