large organization nameservers sending icmp packets to dns servers.
jabley at ca.afilias.info
Mon Aug 6 21:53:38 UTC 2007
On 6-Aug-2007, at 16:31, Peter Dambier wrote:
> John L wrote:
>> Um, unless I seriously misunderstand the client DNS cache wants to
>> know which server is closest. So it sends DNS queries to all
>> three NS at the same time. Then it waits for the answers.
>> Whichever one answers first is the closest. What am I missing?
> The bind_garbadge_collection_delay.
> From time to time bind goes to sleep, depending on the size
> and number of zones the nameserver does host.
I think you're talking about the performance of BIND 9 as a cache.
This is pretty tangential, but there was a good presentation on work
being done to fix that performance problem by Michael Graff at the
recent DNS ops workshop in Chicago:
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