[Pdns-users] Question about Query Cache

bert hubert bert.hubert at netherlabs.nl
Wed Dec 12 20:31:13 UTC 2012


On Wed, Dec 12, 2012 at 11:43:10AM -0800, George Fawcett wrote:
> Bert
> 
> Its about the Query cache, and authoritative server query cache.
> I want to know if a particular DNS server resolves a dynamic dns entry via
> the pipe interface.

In that case, you need to turn off the caches, sorry. But pipe backends can
be very very fast luckily.

	Bert


> If the requesting DNS servers IP address is included in the cache entry ?
> If the same DNS server looking for the same query if it will get the cache
> entry or if it goes back down to pipe back-end to resolve the request ?
> 
> George
> 
> 
> On Wed, Dec 12, 2012 at 11:06 AM, bert hubert <bert.hubert at netherlabs.nl>wrote:
> 
> > On Wed, Dec 12, 2012 at 10:58:20AM -0800, George Fawcett wrote:
> > > Hello pdns-users,
> > >
> > > I have a question about the query cache, does the query cache take in
> > > account the the requesting resolvers IP in the cache ?
> > > So that it caches the result for that particular resolver ?
> > > Meaning more of the same request will return the cached value ?
> >
> > Hi George,
> >
> > Is your question about the packet cache (which caches packets) or about the
> > query cache (which caches backend queries to the database)?
> >
> > Also, about authoritative of recursor?
> >
> > Please let me know so I can write the right answer!
> >
> >         Bert
> >
> > --
> > PowerDNS Website: http://www.powerdns.com/
> > PowerDNS Community Website: http://wiki.powerdns.com/
> > PowerDNS is supported and developed by Netherlabs:
> > http://www.netherlabs.nl
> >



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