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<p class=MsoNormal>If MRTG runs via rrdcached (RRDTool 1.4) , then there’s
a decision to make on the RRD file checks.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>When it runs locally or via rrdcached with UNIX sockets,
then the existence check is quick and simple, and the check for the rrd file
having the correct max/type settings is relatively cheap.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>However when running via rrdcached with TCP sockets, you
have the problem that to test for existence and parameters you need to do a
remote rrdinfo, which is relatively expensive, particularly since it seems to
happen for ever RRD file on every cycle.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>It could be changed to only attempt creation of the RRD file
if the update fails, but this would mean that changes of MaxBytes/type wouldn’t
be actioned. The test for rrd Maxbytes/type should only be done once –
on initial cfg file processing – but I’m not sure at the moment how
to manage this.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Would people prefer to omit the rrdtune step and do a create
attempt only after a failed update (fast), or check the rrd file existence and
configuration every cycle (slow but flexible)? Or maybe this should be a
global option in the cfg file?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>As for Threshold checks, these have to be omitted if you’re
using rrdcached, as rrdcached does not yet support updatev.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve also not yet quite managed to get Routers2 to
work via the rrdcached since the remote rrdfetch doesn’t support –s,
but we’re close…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Steve<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><b>Steve Shipway<o:p></o:p></b></p>
<p class=MsoNormal><span style='font-size:10.0pt'>steve@steveshipway.org<o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;color:#595959'>Routers2.cgi
web frontend for MRTG/RRD; NagEventLog Nagios agent for Windows Event Log
monitoring; check_vmware plugin for VMWare monitoring in Nagios and MRTG; and
other Open Source projects.<o:p></o:p></span></i></p>
<p class=MsoNormal><span style='font-size:10.0pt'>Web: <a
href="http://www.steveshipway.org/software">http://www.steveshipway.org/software</a><o:p></o:p></span></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='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='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><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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