[ntp:questions] Updates to Delay Calculation in Multicast Mode

Jari Takkala jtakkala at gmail.com
Fri Oct 12 16:40:31 UTC 2012

On Fri, Oct 12, 2012 at 5:19 PM, Dave Hart <hart at ntp.org> wrote:

> Use ntpdc -c iostats to sample some of your S1 servers over time and
> determine their peak and/or average queries per second.  Unless they
> are seeing hundreds or thousands of queries per second, my guess is
> you're better off using unicast (or manycast, which operates as
> unicast after server discovery).  If you are seeing substantial load
> on your S1s, you might consider an intermediate layer of S2 servers to
> handle the client load while minimizing traffic to the S1s -- there is
> very little difference in time service quality from S2s on the same
> LAN as their S1 sources.

Thanks, I wasn't aware of this command, and I admit I haven't read much on
manycast. Sounds like manycast might be a solution for us. I'll look into
it. Thanks again for your help,


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