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List: rrd-users
Subject: [rrd-users] trend woes
From: "Robert Hagens" <rhagens () envysion ! com>
Date: 2009-05-20 15:35:12
Message-ID: 271D6D43F249314EB218B0F9A0F704CE014B32D8 () EXVBE012-14 ! exch012 ! intermedia ! net
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I have an rrd file with a few weeks of data in it. Using fetch, I can
see I have data points every 5 minutes from before 5/10/09 to current
(5/20/09).
My RRD file def is
"DS:raw:GAUGE:3600:0:1",
"RRA:AVERAGE:0.5:1:17280",
"RRA:AVERAGE:0.5:288:360",
When I try to use trend like
graph x --start 1241969266 --end 1242829666
'DEF:rawdata=/usr/local/tools/rrd/envysion.ea.rrd:raw:AVERAGE' \
'CDEF:trend=rawdata,854400,TREND' \
'VDEF:last=trend,LAST' 'PRINT:last:%2.4lf'
I get nan
It seems I should be able to set the timespan parameter for TREND to 10
days (10*24*60*60). However, I get nan.
If I reduce the timespan to a somewhat random, smaller number (say
850400), then I get a number.
Any thoughts as to why I am getting nan? There are no nan datapoints in
this time range, I've checked with fetch.
Using TRENDNAN yields the same result.
Thanks,
Rob
Robert Hagens | Chief Technical Officer| Envysion, Inc.
950 Spruce Street | Louisville, CO 80027
303.590.2365 office | 303.590.2351 fax
rhagens@envysion.com <mailto:rhagens@envysion.com> | www.envysion.com
<http://www.envysion.com/> | Visit our blog
<http://managedvideoblog.com/>
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<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have an rrd file with a few weeks of data in it. Using fetch,
I can see I have data points every 5 minutes from before 5/10/09 to current
(5/20/09).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My RRD file def is <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-indent:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>"DS:raw:GAUGE:3600:0:1",<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
"RRA:AVERAGE:0.5:1:17280",<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
"RRA:AVERAGE:0.5:288:360",<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>When I try to use trend like <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>graph x --start 1241969266 --end 1242829666
'DEF:rawdata=/usr/local/tools/rrd/envysion.ea.rrd:raw:AVERAGE' \
\<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>'CDEF:trend=rawdata,854400,TREND'
\<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>'VDEF:last=trend,LAST'
'PRINT:last:%2.4lf'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I get nan<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>It seems I should be able to set the timespan parameter for
TREND to 10 days (10*24*60*60). However, I get nan.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If I reduce the timespan to a somewhat random, smaller
number (say 850400), then I get a number. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any thoughts as to why I am getting nan? There are no nan \
datapoints in this time range, I’ve checked with fetch. \
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Using TRENDNAN yields the same \
result.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,<br>
Rob<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
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height=58 id="_x0000_i1025" \
src="cid:image001.jpg@01C9D92D.F8CF2310"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Century Gothic"><span style='font-size:
10.0pt;font-family:"Century Gothic"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color="#5f5f5f" face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:#5F5F5F;font-weight:
bold'>Robert Hagens</span></font></b><font size=2 face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century \
Gothic"'> </span></font><strong><b><font color="#0099ff" face="Times New \
Roman"><span style='color:#0099FF'>|</span></font></b></strong><b><font size=2 \
color=black face="Century Gothic"><span style='font-size:10.0pt; font-family:"Century \
Gothic";color:black;font-weight:bold'> </span></font></b><font size=2 face="Century \
Gothic"><span style='font-size:10.0pt;font-family:"Century Gothic"'>Chief Technical \
Officer</span></font><strong><b><font color="#0099ff" face="Times New Roman"><span \
style='color:#0099FF'>|</span></font></b></strong><font size=2 color="#0099ff" \
face="Century Gothic"><span style='font-size:10.0pt; font-family:"Century \
Gothic";color:#0099FF'> <b><span style='font-weight:bold'>Envysion, Inc.</span></b> \
</span></font><font size=2 face="Century Gothic"><span \
style='font-size:10.0pt;font-family:"Century Gothic"'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=2
face="Century Gothic"><span style='font-size:10.0pt;font-family:"Century \
Gothic"'>950 Spruce Street</span></font></st1:address></st1:Street><font size=2
face="Century Gothic"><span style='font-size:10.0pt;font-family:"Century Gothic"'>
</span></font><strong><b><font color="#0099ff" face="Times New Roman"><span
style='color:#0099FF'>|</span></font></b></strong><font size=2 color="#00ccff"
face="Century Gothic"><span style='font-size:10.0pt;font-family:"Century Gothic";
color:#00CCFF'> </span></font><st1:place w:st="on"><st1:City w:st="on"><font
size=2 face="Century Gothic"><span style='font-size:10.0pt;font-family:"Century \
Gothic"'>Louisville</span></font></st1:City></st1:place><font size=2 face="Century \
Gothic"><span style='font-size:10.0pt;font-family:"Century Gothic"'>, <st1:State \
w:st="on">CO</st1:State> <st1:PostalCode \
w:st="on">80027</st1:PostalCode><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Century Gothic"><span style='font-size:
10.0pt;font-family:"Century Gothic"'>303.590.2365 office \
</span></font><strong><b><font color="#0099ff" face="Times New Roman"><span \
style='color:#0099FF'>|</span></font></b></strong><font size=2 color="#0099ff" \
face="Century Gothic"><span style='font-size:10.0pt; font-family:"Century \
Gothic";color:#0099FF'> </span></font><font size=2 face="Century Gothic"><span \
style='font-size:10.0pt;font-family:"Century Gothic"'>303.590.2351 \
fax<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a href="mailto:rhagens@envysion.com"
title="blocked::mailto:bzigich@envysion.com"><font size=2 color="#0099ff"
face="Century Gothic"><span style='font-size:10.0pt;font-family:"Century Gothic";
color:#0099FF'><span \
title="blocked::mailto:bzigich@envysion.com">rhagens@envysion.com</span></span></font></a></span></font><font
size=2 color="#0099ff" face="Century Gothic"><span style='font-size:10.0pt;
font-family:"Century Gothic";color:#0099FF'> </span></font><strong><b><font
color="#0099ff" face="Times New Roman"><span \
style='color:#0099FF'>|</span></font></b></strong><font size=2 color="#0099ff" \
face="Century Gothic"><span style='font-size:10.0pt; font-family:"Century \
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Gothic"><span style='font-size:10.0pt; font-family:"Century \
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href="http://managedvideoblog.com/" \
title="blocked::http://managedvideoblog.com/"><b><font size=2 color="#0099ff" \
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