>From: James Murakami <address@hidden> >Organization: UCLA >Keywords: 200305121843.h4CIhU7U016942 LDM-6 IDD rtstats Hi James, >We've been running sundog for nearly a month now. I guess what I had in the >ldmd.conf was incorrect ("rtstats -d /home/ldm/logs -h >rtstats.unidata.ucar.edu"). I removed the "-d /home/ldm/logs" reference and I >saw the statistics page was updating properly. Excellent. I took a quick look at the real time stats from sundog, and see that its clock is most likely off: http://www.unidata.ucar.edu/staff/chiz/rtstats Statistcs by host http://www.unidata.ucar.edu/staff/chiz/rtstats/siteindex.shtml sundog.atmos.ucla.edu [6.0.10] http://www.unidata.ucar.edu/staff/chiz/rtstats/siteindex.shtml?sundog.atmos.ucla.edu Bring up the latency plot for any feed (like IDS|DDPLUS) and notice that the lowest the latency goes is about 183 seconds. Even though it is possible that your latencies are always at least 3 minutes, it is more likely that your system clock is off by that amount. I have been advising sites to run 'ntpdate' from 'root's crontab to set the clock once per hour _if_ they are not already running xntpd. Here is an example of how to run ntpdate out of root's cron: 0 * * * * /usr/sbin/ntpdate timeserver > /dev/null You would replace 'timeserver' with the fully qualified hostname for the time server you would access to set your clock. Lists of Stratum 1 and 2 time servers can be found, respectively in: Stratum 1:: http://www.eecis.udel.edu/~mills/ntp/clock1a.html Stratum 2:: http://www.eecis.udel.edu/~mills/ntp/clock2a.html I have been advising folks to look through these web pages and identify a public Stratum 2 server that is "close" to you. Using the time service from these folks typically requires that you send them an email that you are doing so. Tom
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