[ntp:questions] NTP vs RADclock?
joegwinn at comcast.net
Sun Jun 3 19:53:49 UTC 2012
In article <jqgakc$420$1 at dont-email.me>,
David Woolley <david at ex.djwhome.demon.invalid> wrote:
> skillzero at gmail.com wrote:
> > Has there been any independent comparison of NTP vs RADclock ?
> > Information on the RADclock site seem to indicate it performs pretty
> > well, but I haven't seen any analysis except from the RADclock
> > authors.
> This is the first I've heard of it, so I assume that it has never
> appeared on this newsgroup, and its authors are not active here.
> What really annoys me, though, is that it fails to describe the essence
> of the algorithm on the first page. That's par for the course for
> commercial software, but this says that it is open source. Can you
> point me to where this information is provided (I think ntpd has a
> similar problem, though).
> > I'm using NTP today for synchronization between devices on a LAN to
> > each other of an internal clock separate from the system's normal wall
> > clock (which uses the system's NTP). So I have flexibility with update
> > intervals (1-3 seconds acceptable in my case) and other parameters.
> >  <http://www.synclab.org/radclock/>
I looked at one of their demonstrations, TIM_2008_camera.pdg, where they
showed 10 microsecond sync over a LAN, with very bad NTP performance.
But I've done 7 microsconds with NTP in a quiet testbed on 1996-era
hardware, so I don't know what the problem with NTP was. I'll have to
read the paper more carefully.
More information about the questions