[131429] in North American Network Operators' Group
Re: NTP Server
daemon@ATHENA.MIT.EDU (Jack Carrozzo)
Sun Oct 24 13:15:04 2010
In-Reply-To: <m2vd4r5xh6.wl%randy@psg.com>
Date: Sun, 24 Oct 2010 13:14:05 -0400
From: Jack Carrozzo <jack@crepinc.com>
To: Randy Bush <randy@psg.com>
Cc: North American Network Operators Group <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
More than likely, it's more important that all your machines are synced
accurately in time to each other, vs. a wider sync range that's
statistically closer to the 'real' value.
-Jack Carrozzo
On Sun, Oct 24, 2010 at 1:09 PM, Randy Bush <randy@psg.com> wrote:
> > 1) How necessary do you believe in local NTP servers? Do you really
> > need the logs to be perfectly accurate?
>
> what is "perfectly accurate?" perfection is not very realistic. to
> what use do you put these logs? what precision and jitter are required
> for that use?
>
> imiho, if you are just comparing router and server log files, run off
> public. if you are trying to do fine-grained measurement, you are going
> to invest a lot in clock and propagation research.
>
> > 2) If you do have a local NTP server, is it only for local internal
> > use, or do you provide this NTP server to your clients as an added
> > service?
>
> i would generally let customers chime off routers which are strat 2 or
> 3. if a customer has other needs, then they can deal. if they are
> really concerned, they should not bet on me anyway.
>
> > 3) If you do have a local NTP server, do you have a standby local NTP
> > server or do you use the internet as your standby server?
>
> again, depends on your needs.
>
> randy
>
>
