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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='color:#1F497D'>First question is whether you are using RRDTool or Native Log format. Merging is much, much simpler if you are using RRDTool.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>If Using RRDTool, first you need to convert your RRD files to the destination system format. Dump them to XML (rrdtool dump) on the source system, then import back to RRD files on the destination (rrdtool import). This will get you two RRD files; your historical one, and your new one (if you had done this right at the beginning, of course, you’d just be able to put the historical one in place and continue to use that).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>To merge the new and old files, there are several tools available. If you download the latest version of Routers2, then the rrdmerge.pl script in the extras directory will merge any number of RRD files to a single file.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>If you’re using the old log file format, then I don’t know of any tools for merging; however it is plain text and so you should just be able to copy it for mthe source system to the destination system, and with a bit of scripting can probably merge them yourself.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='color:#1F497D;mso-fareast-language:ZH-TW'>Steve Shipway<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D;mso-fareast-language:ZH-TW'>s.shipway@auckland.ac.nz<o:p></o:p></span></p></div><p class=MsoNormal><span style='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";mso-fareast-language:ZH-TW'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:ZH-TW'> mrtg-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch [mailto:mrtg-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] <b>On Behalf Of </b>Ian Diddams<br><b>Sent:</b> Tuesday, 22 July 2014 4:05 a.m.<br><b>To:</b> 'mrtg@lists.oetiker.ch'<br><b>Subject:</b> [mrtg] migrating MRTG<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB>I’m moving MRTG from a solaris box to a linux (centos 6) server, running mrtg 2.17.4 as a fresh installation.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>It’s all working fine BUT … I would rather like the old history from the previous server to be migrated too, so that we get the full last-year-graph as well.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>I’ve tested an idea for the cpu logs we have by concatenation the old file beneath the new file… but while I can see from the epoch dates in it the logged data is “there” it doesn’t result in a yearly/monthly file etc.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>What need I be doing to achieve this?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>Cheers<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB>ian</span><span lang=EN-GB style='font-size:8.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:EN-GB'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:ZH-TW'><o:p> </o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span lang=EN-GB style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:ZH-TW'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><span lang=EN-GB style='font-size:7.5pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:ZH-TW'>Disclaimer:<br><br>This message is intended for the addressee only. It may contain information of a confidential or legally privileged nature. If you have received this message in error please notify the sender and destroy the message immediately. All attachments have been scanned for viruses. However IS Solutions plc cannot accept liability for any loss or damage you may incur as a result of virus infection.</span><span lang=EN-GB style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:ZH-TW'><o:p></o:p></span></p></div></div></body></html>