Can't get rid of NaN in rrd / rra
Chris Herrmann <[email protected]> Mon, 14 Aug 2017 22:39:23 +0000
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OK, got it with the excellent help of the folks @ ITPA www.ipta.org.au<http=
://www.ipta.org.au> . Basically the data value that I was putting in had a =
trailling \r\n. Finding this out was done with...
root@whisk:~# echo "$myvar" | od -a
0000000 0 . 7 8 cr nl
0000006
and:
printf "%f" "$myvar"
: invalid number.78
0.000000
This occurred because it was the last field (column) in the file, so "cut" =
was grabbing the carriage return as part of the last field.
I fixed it by adding an additional dummy field to the returned sql, so that=
instead of grabbing the last field in the data set I'm now grabbing the se=
cond last field.
So now I get:
echo "$myvar" | od -a
0000000 b nul fs 0 . 7 8 b nul gs nl
0000013
now which works OK and there's aggregate data appearing in rrds now.
--
Regards
Chris Herrmann
Far Edge Technology
p. 02 84251400
m. 0403 393309
http://www.faredge.com.au
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<p class=3D"MsoNormal">OK, got it with the excellent help of the folks @ IT=
PA <a href=3D"http://www.ipta.org.au">
www.ipta.org.au</a> . Basically the data value that I was putting in had a =
trailling \r\n. Finding this out was done with…<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">root@whisk:~# echo “$myvar” | od -a<br>
0000000 0 . 7 8 cr nl<br>
0000006<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">and:<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Co=
urier New";mso-fareast-language:EN-AU">printf "%f" "$my=
var"<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Co=
urier New";mso-fareast-language:EN-AU">: invalid number.78<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:"Co=
urier New";mso-fareast-language:EN-AU">0.000000<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">This occurred because it was the last field (column)=
in the file, so “cut” was grabbing the carriage return as part=
of the last field.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">I fixed it by adding an additional dummy field to th=
e returned sql, so that instead of grabbing the last field in the data set =
I’m now grabbing the second last field.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">So now I get:<o:p></o:p></p>
<p class=3D"MsoNormal">echo “$myvar” | od -a<br>
0000000 b nul fs 0 . 7 8 b nul gs nl<br>
0000013<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">now which works OK and there’s aggregate data =
appearing in rrds now.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-AU">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-AU">Regards<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-AU"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-fareast-language:E=
N-AU">Chris Herrmann<br>
Far Edge Technology<br>
<br>
p. 02 84251400<br>
m. 0403 393309<br>
<a href=3D"http://www.faredge.com.au"><span style=3D"color:#0563C1">http://=
www.faredge.com.au</span></a>
<o:p></o:p></span></p>
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