On Monday, February 25, 2013 at 0:04, Henk P. Penning wrote: > Maybe ntpd should, for each pool association, keep a timestamp > "last seen in dns", and make decisions based on that ; like > "maybe drop if not seen for 3 months".
Some zones have more than 500 servers, it's completely possible that you can check daily and not see many of the IPs for months. Another reason (from the perspective of the pool) to regularly rotate the servers is that it will even out the traffic to each server. Currently the traffic will just grow and grow and grow. > A server leaving the pool is relatively rare ; the rotation scheme should not > be sub-optimal, just to accomodate such events. Rare? Hardly – about 50% of the servers in the pool leave each year. In 2012 there were 2726 IPs added to the pool and 1935 removed. So far in 2013 we've gotten 339 new IPs and 333 have been removed! I believe having "servers leaving the pool" work better is crucial to the long term stability and functionality of the system. If you are the kind of user who can't stomach the small extra jitter when a server comes and goes you should use your own stratum 1 equipment, not the pool. Ask -- Ask Bjørn Hansen - http://askask.com/ _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
