On Wed, Jun 17, 2015 at 10:20:31PM -0700, indranil.db wrote:
> Hi,
> 
>    Using pipe backend with unix socket to connect to another process which
> is responsible for sending response of DNS queries.
> In case of NXDOMAIN there are multiple communication between PDNS and the
> backend process. Below are the logs:
> 
> Jun 18 11:09:26 Query: 'Q     abc.com.my.domain.com   IN      SOA     -1      
> 127.0.0.1'
> Jun 18 11:09:26 Query: 'Q     com.my.domain.com       IN      SOA     -1      
> 127.0.0.1'
> Jun 18 11:09:26 Query: 'Q     abc.com.my.domain.com   IN      NS      -1      
> 127.0.0.1'
> Jun 18 11:09:26 Query: 'Q     abc.com.my.domain.com   IN      ANY     -1      
> 127.0.0.1'
> Jun 18 11:09:26 Query: 'Q     *.com.my.domain.com     IN      ANY     -1      
> 127.0.0.1'
> 
> However for cases when response is found then the communications are less.
> here are the logs:
> 
> Jun 18 11:10:40 Query: 'Q     xyz.com.my.domain.com   IN      SOA     -1      
> 127.0.0.1'
> Jun 18 11:10:40 Query: 'Q     xyz.com.my.domain.com   IN      ANY     -1      
> 127.0.0.1'
> 
> Is there anyway we can reduce the NXDOMAIN communication calls and make it
> more faster?
> 
> -- IB
> 
>

To send NXDOMAIN, just reply with END. No DATA.

Aki 

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