[rrd-users] Question about RRDTool ..

Jean-Yves Avenard jyavenard at gmail.com
Thu Mar 20 08:42:48 CET 2008

Hi again

On Thu, Mar 20, 2008 at 3:09 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> timestamp    local             remote
>  1205895600:  1.2642200000e+03  1.6115000000e+02
>  1205906400:  1.2642200000e+03  1.6115000000e+02
>  1205917200:  1.2642200000e+03  1.6115000000e+02
>  1205928000:  1.2642200000e+03  1.6115000000e+02
>  1205938800:  1.2642200000e+03  1.6115000000e+02
>  1205949600:  1.2642200000e+03  1.6115000000e+02
>  1205960400:  1.2642200000e+03  1.6115000000e+02
>  1205971200:  1.2661600000e+03  1.6115666667e+02
>  1205982000:  1.2350157481e+03  1.4383395556e+02
>  As you can see, it has stored the value 1235 and 143.
>  What happened to my 1209.49 and 124.98 ??

I think I have identified where the problem lies.

The timestamp needs to be a multiple of the frequency, being in the
EST time zone (GMT+11) it means that all my values gets transformed
for some reason, I'm not sure on how they are calculated.
If I re-entered my time and make sure the the timestamp are a multiple
of 10800 (3 hours) in the GMT zone, then the value gets plotted
properly and displayed as it should.

This sounds like a bug to me. You can not use RRD to use a timeframe
like 3 hours in your own timezone otherwise the value retrieved will
be transformed (but I don't know how).

Any ideas on how to get around the problem ?

Thank you

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