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<p class="MsoNormal">Hello!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">We use dnsdist with 1 single backend server (PDNS). So if this backend is overloaded, dnsdist will detect the backend as DOWN. Hence, the only server for this backend pool down. How will dnsdist behave if all servers
for a backend pool are down? Will it stop senden queries to the backend, or will it still send queries to the DOWN server as there is no UP server available?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So it may be useful to disable healthchecks completely. How can this be done?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My current config is a few years old tested with dnsdist 1.3. These days, dnsdist was faster when I added the listen port multiple times, and also add the single backend server multiple times, to have more receiver threads.
For example:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-- Open the same socket multiple times. This allows better load distribution<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-- over all cores. Note: 1. setLocal(), dann addLocal()!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">setLocal("192.174.68.96:53", { reusePort=true, tcpFastOpenSize=100 })<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">addLocal("192.174.68.96:53", { reusePort=true, tcpFastOpenSize=100 })<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-- Define the Backend Server Pools. Define them multiple times to have multiple receiver threads<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-- handling the responses from the Backend.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">newServer{address='127.0.0.1:14001',name='pdns_1'} -- this is the PowerDNS server<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">newServer{address='127.0.0.1:14001',name='pdns_2'} -- this is the PowerDNS server<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it still (dnsdist 1.6/1.7) useful/necessary to add listenSockets and Backendserver multiple times to improve performance?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Klaus<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">-- <o:p></o:p></p>
<p class="MsoNormal">Klaus Darilion, Head of Operations<o:p></o:p></p>
<p class="MsoNormal">nic.at GmbH, Jakob-Haringer-Straße 8/V<o:p></o:p></p>
<p class="MsoNormal">5020 Salzburg, Austria<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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