nanog mailing list archives
Picking outside NTP servers (Re: NTP Issues Today)
From: Jay Ashworth <jra () baylink com>
Date: Tue, 20 Nov 2012 16:53:39 -0500 (EST)
----- Original Message -----
From: "Darius Jahandarie" <djahandarie () gmail com>
Choosing the first four servers is usually pretty straightforward: *.CC.pool.ntp.org But beyond that, I'm honestly rather curious what server selections are a good idea. A first thought would be an adjacent country, but maybe there is a benefit to picking things outside of the pool.ntp.org selection entirely? I see that Jared used *.fedora.pool.ntp.org -- I wonder if there was a specific reason for that or if my questions are even worth thinking about at all :-).
Ah; the question that has plagued mankind since the beginning of.. time. :-) There are a couple of documents on this topic at ntp.org, and there's the traditional list -- of questionable accuracy at this point -- of open-acess Strat 1 and 2 servers. For myself, I usually pick the first three in us.pool.ntp.org, tick and tock, time.nist.gov, and a couple of regionally appropriate large universities. I have always aimed for 6 to 8 outside servers, and a pair inside, preferably in different locations, both talking to one another. If your site is in Internet Business, you should probably peer with your business partners. If you deal with Google Docs or AWS, you should probably peer with them, if they have servers for that. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274
Current thread:
- Re: NTP Issues Today, (continued)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Steve Meuse (Nov 20)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Jay Ashworth (Nov 20)
- Re: NTP Issues Today Jared Mauch (Nov 20)
- Re: NTP Issues Today George Herbert (Nov 20)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Darius Jahandarie (Nov 20)
- Re: NTP Issues Today Mike Lyon (Nov 20)
- Re: NTP Issues Today Jared Mauch (Nov 20)
- Picking outside NTP servers (Re: NTP Issues Today) Jay Ashworth (Nov 20)
- Re: Picking outside NTP servers (Re: NTP Issues Today) George Herbert (Nov 20)
- Re: Picking outside NTP servers (Re: NTP Issues Today) Majdi S. Abbas (Nov 20)
- Re: NTP Issues Today Ask Bjørn Hansen (Nov 21)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Darius Jahandarie (Nov 20)
- Re: NTP Issues Today Blake Dunlap (Nov 20)
- Re: NTP Issues Today George Herbert (Nov 20)
- Re: NTP Issues Today Robert E. Seastrom (Nov 21)