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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'>As a comparison, we use the rrdcached options: <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'> -s mrtg -m 0660 -l unix:/var/tmp/rrdcached.sock -l mrtg.auckland.ac.nz -l localhost -z 60 <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'> -p /var/tmp/rrdcached.pid -t 4 -j /u01/rrdtool/journal -b /u01/rrdtool -w 1800 -O -a 6<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'>This has had a significant improvement on our previous IO problems.<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 frontend, you could use Routers2 (which supports rrdcached directly :). However, if you prefer to use 14all, then you can still do this via rrrdcached, at least if you are using Apache. Just set the RRDCACHED_ADDRESS environment variable appropriately in the web server so that it is set when the CGI is called, and this will make the 14all calls all use rrdcached, where possible.<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:black'><Directory "/u01/www/cgi-bin"><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'> SetEnv RRDCACHED_ADDRESS unix:/var/tmp/rrdcached.sock<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'></Directory><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'>You might want to consider using the trunk version of rrdtool, since this has more comprehensive rrdcached support for the various rrdtool functions.<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'>I still find rrdcached tuning a bit of a black art, and I’ve been investigating it for some time…<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><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<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)9 924 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=EN-GB style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:navy'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></i></p></div><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"'> 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>Pavel Ruzicka<br><b>Sent:</b> Wednesday, 1 August 2012 1:14 a.m.<br><b>To:</b> mrtg@lists.oetiker.ch<br><b>Subject:</b> [mrtg] MRTG with RRDcached tuning<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p style='margin:0cm;margin-bottom:.0001pt'><span style='font-size:9.0pt;font-family:"Courier New"'>Hello,<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-paragraph-type:empty;-qt-block-indent:0'><span style='font-size:9.0pt;font-family:"Courier New"'> <o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I succesfully enabled RRDCached for my MRTG setup.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I have mrtg-2.17.4 and rrdtool-1.4.7.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I am trying to spread kernel flushes in a time with enabling RRDCached.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>Daemon runs with "-w 900 -z 900" parameters, but it looks like all kernel flushes are still in a same time every 5 minutes.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>Can somebody recommend me his parameters for rrdcached?<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-paragraph-type:empty;-qt-block-indent:0'><span style='font-size:9.0pt;font-family:"Courier New"'> <o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I want to try spread writes to one hour, but I want to graph actual data.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I use 14all.cgi and it doesn't support rrdcached. Have somebody 14all.cgi<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>patched for rrdcached support? I am not perl guru.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>I know, that I must add something like this for RRD graph function<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>"--daemon unix:/var/run/rrdcached.sock" but I don't know how cleanly<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>to read path from mrtg config and add it to the code.<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>Mail of author <a href="mailto:bawidama@users.sourceforge.net">bawidama@users.sourceforge.net</a> doesn't work...<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-paragraph-type:empty;-qt-block-indent:0'><span style='font-size:9.0pt;font-family:"Courier New"'> <o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>Best regards,<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-paragraph-type:empty;-qt-block-indent:0'><span style='font-size:9.0pt;font-family:"Courier New"'> <o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-block-indent:0;-qt-user-state:0'><span style='font-size:9.0pt;font-family:"Courier New"'>Pavel Ruzicka<o:p></o:p></span></p><p style='margin:0cm;margin-bottom:.0001pt;-qt-paragraph-type:empty;-qt-block-indent:0'><span style='font-size:9.0pt;font-family:"Courier New"'> <o:p></o:p></span></p></div></div></body></html>