[Pdns-users] Query Logging

[Brad Knowles]

At 11:19 AM -0700 2005-09-29, Max Clark wrote:

>  I have a powerdns installation with a large amount of domains running on
>  the system. Recently the system has become completely overwhelmed with
>  queries (I am assuming that it is due to low ttl's). While the web
>  interface gives a lot of great information - is it possible to log each
>  query request to a running file for after the fact analysis?

	I'm not familiar with the PowerDNS implementation of query 
logging, but for BIND turning this on will result in roughly a factor 
of ten to a hundred increase in load on the server.  This is a result 
of the massive increase in I/O caused by writing all this data to the 
file.

	If you can afford to turn on query logging, you don't need it. 
If you need it, you can't afford to turn it on.

-- 
Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.