[rrd-users] Large-interval data is not displaying as I expected

Andy Riebs andy.riebs at hp.com
Fri Feb 27 04:10:19 CET 2009


Thanks for recognizing Alex's contributions to understanding RRDtool. If 
only future users could read your post first!  :)


Herminio Gonzalez wrote:
>> As a workaround, I am hoping that if I change my update cron job to
>> happen at 9:00AM local time (0:00 UTC), then things may work out.
> Just wanted to follow up this thread, for the benefit of anyone
> looking through the archives, by stating that the workaround did fix
> the problem for me.Now my cron job runs at 9AM local time, which is
> midnight UTC throughout the year.
> This was the situation before I changed the cron job:
> http://myhabitat.net/~hermi/rrd/denyhosts-problem.png
> Five days later, the new data points are all neatly aligned on integer
> boundaries:
> http://myhabitat.net/~hermi/rrd/denyhosts-aligned.png
> The lesson for me here is to pay attention to the normalization step,
> as described very nicely in
> http://www.vandenbogaerdt.nl/rrdtool/process.php
> Herminio Gonzalez
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