[Xymon] rrdfetch interval changing

[Jeremy Laidman]

The rrd file contains 5-minute data only going back so far (typically 576
samples, or 48 hours).  If you ask for data from before that point in time,
rrdtool will switch to the next interval of consolidated data to give you
the earlier data points you requested.  Try setting your start time to
"-1d", and you should see 5-minute samples.  For example, the difference
between 2 days and 3 days:

$ rrdtool fetch disk,root.rrd AVERAGE -r 300 -s -2d -e now|tail -5
1387319100: 8.0000000000e+01 7.8994000000e+05
1387319400: 8.0000000000e+01 7.8994000000e+05
1387319700: nan nan
1387320000: nan nan
1387320300: nan nan
$ rrdtool fetch disk,root.rrd AVERAGE -r 300 -s -3d -e now|tail -5
1387314000: 8.0000000000e+01 7.8994000000e+05
1387315800: 8.0000000000e+01 7.8994000000e+05
1387317600: 8.0000000000e+01 7.8994000000e+05
1387319400: 8.0000000000e+01 7.8994000000e+05
1387321200: nan nan

The interval for -2d is 300s; for -3d is 1800s.  In fact, the "-r" is
probably being over-ridden by the sample interval of the consolidated data
being requested.

J



On 17 December 2013 22:35, ROZEK Michal (Prestataire) <
michal.rozek.externe at cnp.fr> wrote:

>  Hi guys,
>
>
>
> I am trying to fetch disk usage data from the RRD file
> disk,projets,my,home.rrd with the resolution/interval of 5minutes:
>
>
>
> rrdtool fetch disk,projets,my,home.rrd AVERAGE -r 300 -s 1371867766 -e
> 1387279723 | awk '{printf("%s|", strftime("%Y %b %d",$1)); printf("%s|",
> strftime("%H:%M:%S",$1)); printf("%.2f\n",$2)}'
>
>
>
> The start date is 06.2013 and the end date is 17.12.2013
>
> Unfortunately I receive data with interval of one day:
>
>
>
> [..]
>
> Date:              Time:       % Busy:
>
> 2013 Dec 10|01:00:00|10.00
>
> 2013 Dec 11|01:00:00|10.00
>
> 2013 Dec 12|01:00:00|10.00
>
> 2013 Dec 13|01:00:00|10.00
>
> 2013 Dec 14|01:00:00|10.00
>
> 2013 Dec 15|01:00:00|10.00
>
> 2013 Dec 16|01:00:00|10.00
>
> 2013 Dec 17|01:00:00|10.00
>
>
>
>
>
> How to change it ? The “-r 300” option doesn’t work apparently…
>
>
>
> Je reste à votre disposition pour tout complément d'informations.
> Cordialement.
> Regards / Z poważaniem / تحية خالصة / 敬礼
>
>
>
> Michal ROZEK
>
> CDS Ingénierie UNIX
>
> Société Blue consulting
>
> Tél : 01.42.18.69.42
>
> michal.rozek.externe at cnp.fr
>
>
>
>
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