> So an wild estimate would be 300 packets a second. > How many NTP users would that translate to realistically?
At poll interval 64, 19200. At poll interval 1024, 307200. (And, if sufficiently badly behaved, one. :-) Absent severe misbehaviour, I'd be very surprised if it topped out at less than 1000 clients, and somewhat surprised if the practical ceiling were under 10000. My pool host (216.46.5.9) is a SPARCstation IPX, which means (according to the jwbirdsall reference) 28.5 MIPS. I don't know how many clients it's serving, but I've made no particular attempt to limit it, and it seems to be not only handling them, but handling them without impairing its other functions (it's also my house router, handling my uplink, my house routed subnet, and my house nonrouted subnet). I just now did a 1000-packet tcpdump for port 123 on its uplink. It took 42 seconds to capture 1000 packets, so there's at least one pool host which is handling only some 23-24 pps even though no particular attempt has been made to limit it. Another 1000-packet capture involved 328 distinct peer addresses; I tried a 10000-packet capture, which gave me 1593 distinct peers - more hosts than the entire pool. /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML [EMAIL PROTECTED] / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
