Dave wrote: > David Woolley wrote: >> Dave wrote: >>> Looking at the logs on my Sun Blade 2000 running Solaris 10, I see >>> numerous occasions on which the time has been stepped. Looking at the >>> few only (today, 1/5/2008), I see it was stepped around +0.3 sec at 3 >>> AM, then -0.4 at 4:30 am, then half an hour later at 5am it was moved >>> -0.6 sec, then 40 minutes later it is moved another -0.6 sec. Since >>> then (its now 1:30 pm), it has not changed. >> >> Positive and negative steps which approximately balance each other >> indicate a heavily loaded link with variable and asymmetric >> propagation delays. Apart from local servers, or your Rubidium PPS, >> or reducing the traffic, the other solutions are to apply and get the >> ISP to apply traffic shaping to prioritise NTP traffic, or to use the >> tinker huff and puff option, noting the health warnings attached to it. > > > I've changed to local servers as suggested > > server 0.uk.pool.ntp.org > server 1.uk.pool.ntp.org > server 2.uk.pool.ntp.org > server 3.uk.pool.ntp.org
I meant to add that perhaps an overloaded network is the problem. The machine only has a 256 kb/s uplink (1024 kb/s downlink), and is used as a web server for a small number of little used domains. Perhaps this is putting too much strain on it. I occasionally download large files (like iso images of Solaris), so I'll check if things get worst next time I do that. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
