<div dir="ltr"><div>Why not let the process run parallely and then picked out the one which is retured firstly to the client? <br><br></div>Regards<br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-02-23 18:28 GMT+08:00 Peter van Dijk <span dir="ltr"><<a href="mailto:peter.van.dijk@powerdns.com" target="_blank">peter.van.dijk@powerdns.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<span class=""><br>
On 23 Feb 2015, at 6:09 , Hongyi Zhao <<a href="mailto:hongyi.zhao@gmail.com">hongyi.zhao@gmail.com</a>> wrote:<br>
<br>
> forward-zones Comma separated list of ’zonename=IP’ pairs. Queries for zones listed here will be forwarded to the IP address listed. Since version 3.1.5, multiple IP addresses can be specified. Additionally, port numbers other than 53 can be configured.<br>
> Sample syntax: forward-zones=<a href="http://example.org" target="_blank">example.org</a>=203.0.113.210:5300;127.0.0.1, <a href="http://powerdns.com" target="_blank">powerdns.com</a>=127.0.0.1;<a href="http://198.51.100.10:530" target="_blank">198.51.100.10:530</a><br>
><br>
> I just want to know the mechanism when we use multiple ip for Query a zone. I mean is this process sequel or parallel? When we using multiple ip for resoving a specific domain-name, which answer given by the forwarders should be picked up by PowerDNS Recursor and then return it to user's client program?<br>
<br>
</span>It’s best to assume the process is random. For any given query, the resulting data can come from any of the IPs, and there is no guarantee from which one. So, in general, make sure your backend IPs agree on the data!<br>
<br>
Kind regards,<br>
<span class="HOEnZb"><font color="#888888">--<br>
Peter van Dijk<br>
Netherlabs Computer Consulting BV - <a href="http://www.netherlabs.nl/" target="_blank">http://www.netherlabs.nl/</a><br>
<br>
<br>
_______________________________________________<br>
Pdns-users mailing list<br>
<a href="mailto:Pdns-users@mailman.powerdns.com">Pdns-users@mailman.powerdns.com</a><br>
<a href="http://mailman.powerdns.com/mailman/listinfo/pdns-users" target="_blank">http://mailman.powerdns.com/mailman/listinfo/pdns-users</a><br>
</font></span></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Hongyi Zhao <<a href="mailto:hongyi.zhao@gmail.com">hongyi.zhao@gmail.com</a>> <br>Xinjiang Technical Institute of Physics and Chemistry<br>Chinese Academy of Sciences <br>GnuPG DSA: 0xD108493</div>
</div>