[Pdns-dev] What will pdns do when a fast dns server become slow and become fast again?

Aki Tuomi cmouse at youzen.ext.b2.fi
Fri Dec 27 08:08:42 CET 2013


On Thu, Dec 26, 2013 at 10:34:23PM +0800, jacky wrote:
> hi, all, 
>     I think may be it is a question more suitable to dev maillist, so I submit it here. If I made a mistake , please let me know. Thanks.
>  
>     I'am reading the source code of pdns-recursor-3.5.3. There is question I can not understand.
>     When a authoritative dns server become slow because of overload, pdns-recursor will move it backwards in the 
>     t_sstorage->nsSpeeds map, and then a faster dns  server will be used preferred. But when the dns server recoverd 
>     from overload and  become fast again, what will pdns-recursor do about it ? Will pdns-recursor move it forward  
>     in speed map?  I can't find relevant source code. Any suggestion?
> 
> -- 
> jacky
> 

Hi!

It works by moving the fastest one on top. 

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