[rrd-users] rrd insert problem

Andreas Maus a.maus at science-computing.de
Tue Jun 3 14:25:05 CEST 2008

On Tue, Jun 03, 2008 at 05:15:35AM -0700, mobi wrote:
> hi,

> /usr/local/rrd/bin/rrdtool update /usr/local/rrd/db/host1/test.rrd N:1239
> and i get no error on insert, but when i look in the graph or dump the rrd
> this also doesnt happen all the time, but only some time with no pattern.
> anyone has a clue what can it be ?
Time drift? I've seen something like that on systems with a unstable
system clock and without ntp.

Try using the correct time (date +'%s' on Linux) instead of N.

now=`date +'%s'`
rrdtool update [...] ${now}:[...]

(and check the values of $now) 
and of course run ntp to keep your system time stable.



Dipl.-Ing. Andreas Maus             science+computing ag
System Administration               Hagellocher Weg 73
tel.: +49 7071 9457 671             72070 Tuebingen, Germany
fax: +49 7071 9457 411              www.science-computing.de
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