[rrd-users] Re: Cannot fetch the last update? (WAS [mrtg] Re: Why all the NaNs?)

[Tobias Oetiker]

Fernando,

rrdtool 1.0.x did report too much ...

cheers
tobi

Today Fernando Nieto wrote:

> Hello again, sorry to insist but i can't make it work. I'm updating my
> rrds every multiple of 5 minutes.
>
> # rrdoot version
> RRDtool 1.2.12  Copyright 1997-2005 by Tobias Oetiker <tobi at oetiker.ch>
>                Compiled Dec 27 2005 19:24:25
> [...]
>
> # rrdtool last data.rrd
> 1138780800
>
> # rrdtool fetch data.rrd AVERAGE -s 1138780800 -e 1138780800
>                          rttnum              rttsum
> rttsum2               ownum             owsumsd             owsumds
>           losssd              lossds
>
> [*no response at all* ]
>
> # rrdtool fetch data.rrd AVERAGE -s 1138780799 -e 1138780800
>                          rttnum              rttsum
> rttsum2               ownum             owsumsd             owsumds
>           losssd              lossds
>
> 1138780800: 2.0000000000e+01 9.3400000000e+02 4.3624000000e+04
> 2.0000000000e+01 5.1800000000e+02 4.1600000000e+02 0.0000000000e+00
> 0.0000000000e+00
>
>
> The same query but using 1.0.48 gives you back the following response,
> which it's quite different:
>
> # rrdtool version
> RRDtool 1.0.48  Copyright 1997-2004 by Tobias Oetiker <tobi at oetiker.ch>
>
> # rrdtool fetch data.rrd AVERAGE -s 1138780800 -e 1138780800
>                          rttnum               rttsum
> rttsum2                ownum              owsumsd              owsumds
>               losssd               lossds
>
> 1138780800: 2.0000000000e+01 9.3400000000e+02 4.3624000000e+04
> 2.0000000000e+01 5.1800000000e+02 4.1600000000e+02 0.0000000000e+00
> 0.0000000000e+00
>
> # rrdtool fetch data.rrd AVERAGE -s 1138780799 -e 1138780800
>                          rttnum               rttsum
> rttsum2                ownum              owsumsd              owsumds
>               losssd               lossds
>
> 1138780500: 2.0000000000e+01 9.2300000000e+02 4.2613000000e+04
> 2.0000000000e+01 5.0500000000e+02 4.1800000000e+02 0.0000000000e+00
> 0.0000000000e+00
> 1138780800: 2.0000000000e+01 9.3400000000e+02 4.3624000000e+04
> 2.0000000000e+01 5.1800000000e+02 4.1600000000e+02 0.0000000000e+00
> 0.0000000000e+00
>
> I have already changed all my scripts, but it's important for me to
> now if the behaviour is going to change or not in future releases -
> well, unless i'm doing anything different i can see myself  :-s
>
> Thanks again
>
> Best regards,
> fernando
>

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