[prev in list] [next in list] [prev in thread] [next in thread]
List: beowulf
Subject: Re: [Beowulf] ntpd wonky?
From: Gerry Creager <gerry.creager () tamu ! edu>
Date: 2009-02-17 17:30:49
Message-ID: 499AF449.9010002 () tamu ! edu
[Download RAW message or body]
Greg Lindahl wrote:
> On Thu, Dec 11, 2008 at 11:01:31PM -0800, Bernard Li wrote:
>
> > Have you tried other pools eg. pool.ntp.org?
>
> That is stable for me. So it's not me, it's Red Hat's pool that's
> wonky.
>
> I see that CentOS switched to using ntp.org in 5.2, which I didn't
> automagically get thanks to rpm creating ntpservers.rpmnew, even
> though I hadn't modified the ntpservers file. Mmf.
After a network performance class at the Internet2 Joint Techs meeting
in early Feb, I ditched the centos/redhat pools, and have a bunch of
discrete entries in my ntp.conf file. The entries I'm using are seen below:
server owamp.hous.net.internet2.edu
server owamp.chic.net.internet2.edu
server owamp.atla.net.internet2.edu
server now.okstate.edu
server terrapin.csc.ncsu.edu
server otc1.psu.edu
server time-c.timefreq.bldrdoc.gov
server utcnist.colorado.edu
ntpstat is showing a fairly stable 0.5 ms jitter with a 37 ms offset
from an IRIG-locked system at owamp.hous.net.internet2.edu
The recommendation from the I2 geeks was to have at least 5 servers of
known stratum 1 capability.
I'm planning to put my own GPS-timed system into my network to
accommodate all my clusters.
gerry
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org
To change your subscription (digest mode or unsubscribe) visit \
http://www.beowulf.org/mailman/listinfo/beowulf
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic