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blechschmidt avatar blechschmidt commented on June 7, 2024 1

Yes, some resolvers have a higher RTT and some will enforce rate limits.

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blechschmidt avatar blechschmidt commented on June 7, 2024

How do you measure concurrency? Are you maybe referring to the queries per second (qps) rate? (MassDNS currently does not support limiting that.) If resolvers.txt contains one resolver, -s is 10 and the round trip time for one query is 20 ms, then 500 qps are expected. The hash map is initially filled with 10 names and as soon as one name has been resolved, the next name to be resolved is pulled into the hash map.

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h49nakxs avatar h49nakxs commented on June 7, 2024

Yes I was referring to the queries per second, so my understanding wasn't correct.

Thanks for the reply.

Just for my personal knowledge : why does increasing the number of resolvers lower the qps ? Is it because of a higher RTT for some resolvers ?

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