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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The second issue, where AWrong:%c:strftime gives the epoch (IE, time 0) is because the AVERAGE operator in a VDEF does not set the time component – after all, what should it set it to? The MAX and MIN operators set the time component to the time of the peak in question, but AVG doesn’t have any specific point in time, hence it is not set (or rather, it is set to zero).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For the first issue, I’m not sure why this should be; you should be getting ‘10’ or ‘0’, if I read it correctly. It might help to give more details – the DEF statement, the rrdinfo for the RRD file in question, and the version of RRDtool you’re using.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Steve Shipway</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>ITS Unix Services Design Lead<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>University of Auckland, New Zealand<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Floor 1, 58 Symonds Street, Auckland<o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#595959'>Phone: +64 (0)9 3737599 ext 86487<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#595959'>DDI: +64 (0)9 923 6487<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#595959'>Mobile: +64 (0)21 753 189<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#595959'>Email: <a href="mailto:s.shipway@auckland.ac.nz"><span style='color:#595959'>s.shipway@auckland.ac.nz</span></a><o:p></o:p></span></i></p><p class=MsoNormal><span lang=EN-GB style='font-size:18.0pt;font-family:Webdings;color:green'>P</span><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:blue'> </span><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:green'>Please consider the environment before printing this e-mail</span><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:blue'> : </span><span lang=ZH-TW style='font-size:10.0pt;font-family:"MS Gothic";color:green'>打印本</span><span lang=ZH-TW style='font-size:10.0pt;font-family:MingLiU;color:green'>邮件，将减少一棵树存活的机会</span><span lang=EN-GB style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:navy'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch [mailto:rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] <b>On Behalf Of </b>John huysing<br><b>Sent:</b> Monday, 12 August 2013 12:53 p.m.<br><b>To:</b> rrd-users@lists.oetiker.ch<br><b>Subject:</b> [rrd-users] Detecting and handling unknown data<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>After look at the CDEF tutorial<br><br><a href="http://oss.oetiker.ch/rrdtool/tut/cdeftutorial.en.html">http://oss.oetiker.ch/rrdtool/tut/cdeftutorial.en.html</a><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>and reading the section on handling unknown data<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>I thought I would try this to see if I could detect if had unknown data in a rrd, so i could process it differently<o:p></o:p></p></div><p class=MsoNormal>If its unknown set the value to 10 else set to 0<o:p></o:p></p><div><div><pre>CDEF:wrong=currTot,UN,10,0,IF <br><br><o:p></o:p></pre><pre>VDEF:Wrong=wrong,MAXIMUM<o:p></o:p></pre><pre>VDEF:AWrong=wrong,AVERAGE<o:p></o:p></pre><pre>PRINT:Wrong:%5.2lf ----> returns inf<o:p></o:p></pre><pre>PRINT:AWrong:%5.2lf ----> returns a value <o:p></o:p></pre><pre><o:p> </o:p></pre><pre style='margin-bottom:12.0pt'>The 2nd problem is when I try this <br>PRINT:AWrong:%c:strftime<o:p></o:p></pre><pre>I always get the start of unix time ....1970 <o:p></o:p></pre><pre><o:p> </o:p></pre><p class=MsoNormal>John<o:p></o:p></p></div></div></div></div></div></body></html>