Alessandro Vesely wrote:
Sam Varshavchik wrote:
A real DNS server returns records in random order. That's a fundamental
function of DNS: load balancing.
Is it random or round robin?
I've checked bind9's documentation, it's random-cyclic as they call it,
i.e., they just randomly choose the new first member of the list and
then recreate the list in the same order from this point.
As far as I can understand this would result in much less than
reasonable load balancing for MX records.
I still couldn't get a comment from Sam on this matter but I really
think that Courier's current strategy for MX choosing isn't very
reasonable as it relies on the randomness of the list provided by bind.
It's fast but rather uneffective.
Rodrigo Severo
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