On Monday, July 30, 2012 at 1:21 PM, Anssi Johansson wrote: > However, the "average" is the important word here as there will be > traffic bursts. The traffic bursts will only become less frequent when > more servers are added, but it won't reduce the peak values. This is > because most traffic from Turkey originates from SNTP clients which > resolve the NTP server's IP every time the pool is queried, ie. unlike > ntpd which only resolves the hostname once and keeps using that IP > address until ntpd is restarted. Another concern is that I think the > offending Turk Telekom CPE is using only pool.ntp.org (http://pool.ntp.org), > not any of the > subdomains [0-3].pool.ntp.org (http://pool.ntp.org). The traffic would be > spread more evenly > if the [0-3] subdomains were used.
… and I wouldn't be surprised if many/most of the clients are using a few DNS resolvers. If the spikes don't get significantly less with the extra servers added I can try making the tr zone return 4-6 IPs instead of just 3. (I forget if the DNS server can be configured for that on the name level though). Ask -- http://askask.com/ | http://www.ntppool.org/ _______________________________________________ pool mailing list pool@lists.ntp.org http://lists.ntp.org/listinfo/pool
