Hi John,
On 5/12/21 12:50 AM, John Von Essen via Pdns-users wrote:
[ Lots of Background info deleted ] My question is for a random server in Dublin, hitting pdns-recursor on localhost with those 3 forwarders, how is the traffic distributed? Does it go to the first one listed, and then only if the first one doesn’t respond, it tries the next?
In my experience, pdns-recursor versions from 4.3.x spread the load evenly over all listed forwarders. I don't know exactly how they behave if the forwarders have diverging latency. Before, the first forwarder listed got practically all requests.
I ask because I did a stress test with a similar setup and I saw that approx 60-70% of requests went to the IP of the first forwarder listed, then 30% to the second. I was expecting 100% traffic to the first.
Sidenote: Your performance might not be as good as Quad1/8/9 because the caches of your recursors are not well filled. Some software exist to keep the caches of recursor warm. Also the new "refetch" feature in 4.5 will help. Thomas _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users
