[email protected] wrote: > Hi > Where can I find a detailed description of all these values provided > by "ntpq -c rv"? > What do you think which values are important for logging and graphical > display to see problems fast? Here is an example > http://www.wraith.sf.ca.us/ntp/rrd/index.html but I'm not sure what is > important because I can't find good documentation about all the > values. > > Greetings > Thorsten
"Das Buch" (Professor Mills' book on NTP"), or comments in the source code for ntpd. RFC-1305 or its successor if ever released. Here's a link to "Das Buch" http://www.amazon.com/Computer-Network-Time-Synchronization-Protocol/dp/0849358051/ref=sr_1_1?ie=UTF8&s=books&qid=1233676373&sr=8-1 I have not seen it but I understand that the math can get pretty esoteric! Suggestions: Reach - the reachability of the server. It's an eight bit shift register; a one bit is shifted in from the right each time the server replies to a query. A zero is shifted in each time there is no response. It's displayed in octal notation; 377 is good, any thing else means that the server failed to respond to one or more of the last eight queries. Note that this is useless immediately after startup; this and most other statistics are of little value until ntpd has been running for about thirty minutes! Dispersion - the estimated difference between your clock and the clock at the root of the tree. You will probably find that the statistics look their best between 2300 and 0700 local time; people are sleeping rather than beating on the servers and this generally means that the round trip time for query and reply is short and more or less constant; ntpd really likes this and does its best work during these hours. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
