[dnsdist] Clarification on weight in newServer option

[Remi Gacogne]

On 07/27/2017 07:53 PM, Frank Even wrote:
> So, weight seems to be honored on initial traffic receipt.  But if I
> test by taking down the node with a higher weighting, so the traffic
> shifts to nodes with lower weighting, then I bring the heavier
> weighted node back into rotation, traffic does not seem to shift back
> to it.  Now maybe it eventually does, but in 5 minutes or so of
> testing it did not.  Even after taking away the test traffic from the
> client and then re-applying it after a couple minutes, traffic was
> still choosing the lesser weighted node, not the heavier weighted.  I
> guess the question is if left for a longer length of time, would it
> eventually start honoring the weight?

That's not expected, especially since we keep no state to do the
load-balancing. Which policy are you using, wrandom or whashed?
How do you "take down" the node, and more importantly does dnsdist
correctly mark it up when you bring it back?

-- 
Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/

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