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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Look in the documentation for 'rrdtool first' and 'rrdtool lastupdate'.<br>
<a href="http://oss.oetiker.ch/rrdtool/doc/rrdfirst.en.html" target="_blank">http://oss.oetiker.ch/rrdtool/doc/rrdfirst.en.html</a><br>
This returns the first (oldest) entry for a given RRA.<br>
<a href="http://oss.oetiker.ch/rrdtool/doc/rrdlastupdate.en.html" target="_blank">http://oss.oetiker.ch/rrdtool/doc/rrdlastupdate.en.html</a><br>
This returns the last entry time and values<br>
Note that 'rrdtool last' by contrast returns the time of the last update. <br>
<br>
Steve<br>
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<div style="font-family:Tahoma; font-size:13px"><strong>Steve Shipway</strong></div>
<div style="font-family:Tahoma; font-size:13px">University of Auckland ITS</div>
<div style="font-family:Tahoma; font-size:13px"><em>UNIX Systems Design Lead</em></div>
<div style="font-family:Tahoma; font-size:13px"><a href="mailto:s.shipway@auckland.ac.nz">s.shipway@auckland.ac.nz</a></div>
<div style="font-family:Tahoma; font-size:13px">Ph: +64 9 373 7599 ext 86487</div>
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<div style="direction: ltr;" id="divRpF741631"><font color="#000000" face="Tahoma" size="2"><b>From:</b> rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch [rrd-users-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] on behalf of Steven Sim [unixandme@outlook.com]<br>
<b>Sent:</b> Tuesday, 1 July 2014 3:08 p.m.<br>
<b>To:</b> rrd-users@lists.oetiker.ch<br>
<b>Subject:</b> [rrd-users] Fetch the time of the first entry<br>
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<div dir="ltr">Hello;
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<div>I'm being asked to write a scrip to append data to an rrd and plot daily, weekly and monthly graphs of said data.</div>
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<div>I already have a script to create an rrd and write data to it.</div>
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<div>To append, I'll simply bypass the 'creation' logic of my script and use a user specified rrd file.</div>
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<div>But to plot daily, weekly and monthly, I need to know the start time of the first entry in the rrd file.</div>
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<div>Is there a way to determine the time of the first entry of an rrd file?<br>
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<div>Deepest Regards</div>
<div>Steven Sim</div>
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