Chris Davies wrote: >Ryan Malayter wrote: >> Should there be some "rule of thumb" concerning upstream bandwidth? >> Perhaps the pages should suggest at least 384 kbps to qualify for the >> pool (which would mean a systemic offset of ~1 ms)?
> You'll knock out almost the entire UK xDSL group if you require more than 256 > Kb/s upstream. I would go even further, and say: Any effort to "pre-judge" the quality of service from a central location (or cabal) seems foolish when ntpd itself is quite capable of discerning falsetickers (and if anything is likely to be too critical!) One thing that ntpd uses in its determination is latency, BTW, a factor that seems far more relevant than any worries about overall bandwidth or any of the others being discussed. A second thing that it uses is jitter, also seemingly missing from the diagnostics. The two of these together are SURPRISINGLY effective at kicking out a server that has excessive network load or most real-world asymmetric network loads. (Yes, you can imagine asymmetric loads that are not picked up by this but in my experience they don't happen that way!) Tim. _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
