nanog mailing list archives
Re: NIST NTP servers
From: Eygene Ryabinkin <rea+nanog () grid kiae ru>
Date: Thu, 12 May 2016 05:23:55 +0300
Wed, May 11, 2016 at 05:20:28PM -0700, Scott Weeks wrote:
--- mel () beckman org wrote:From: Mel Beckman <mel () beckman org> Accurate time to the millisecond is pretty much essential for any network troubleshooting. Say you want to diagnose a SIP problem. You collect transaction logs from both phones, the VoIP gateway, and the PBX. Now you try to merge them to derive the sequence of events. You NEED millisecond accuracy. ----------------------------------------If all logs are sent to a unix server that does syslogd the log entries would go into the file in order no matter what timestamp is on them.
Modulo latencies and jitter from different machines to the log server. Millisecond precision can be harmed by this, easily. Especially by jitter and order of millisecond here isn't something non-existent in a long-distant networks. -- Eygene Ryabinkin, National Research Centre "Kurchatov Institute" Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.
Current thread:
- Re: NIST NTP servers, (continued)
- Re: NIST NTP servers Harlan Stenn (May 11)
- Re: NIST NTP servers Harlan Stenn (May 11)
- Re: NIST NTP servers Andreas Ott (May 11)
- Re: NIST NTP servers Mel Beckman (May 11)
- Re: NIST NTP servers Jay R. Ashworth (May 11)
- Re: NIST NTP servers Majdi S. Abbas (May 11)
- Re: NIST NTP servers Jared Mauch (May 12)
- Re: NIST NTP servers Mike (May 12)
- Re: NIST NTP servers Gary E. Miller (May 11)
- Re: NIST NTP servers Eygene Ryabinkin (May 11)
- Re: NIST NTP servers Gary E. Miller (May 11)
- Re: NIST NTP servers Lyndon Nerenberg (May 11)