Chris Hastie wrote:
I've noticed big increases in spikes too. I seem to recall some tweaking being done with TTLs not long ago and since then I see bigger, sharper spikes. Frankly, I'd rather have that load evened out a bit. I can cope with the sort of bandwidth I'm seeing if it is spread out, but with sharp spikes I see degraded performance for other services. In the long term, this is not acceptable and may mean that I have to withdraw from the pool, increasing the load on everybody else.
I think the day is near for a special DNS server software that really does load balancing and maybe even takes into consideration where the DNS requests come from (= geographically aware). I guess Ask already had some plans for this? I don't think it would be much of a problem to have to run special DNS server software on the secondaries as well. If the current secondaries can't do it, we'll just have to find ones that can a) run a special DNS server software and b) can deal with the DNS query load.
We now know that the NTP requests themselves average at under 10 packets per second. But how about the DNS requests foor pool servers? Has someone running a pool DNS server measured the amount of DNS queries seen, maybe even gathered some longer term data?
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