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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We have a large network that I have been trying to monitor
with MRTG for years now. As I was given better hand-me-down equipment
over the years I kept running into the wall on the number of Targets I could
query in the 5 minute interval before the next cycle started. I finally
got a new machine built just for MRTG but found that more processing power was
not the key. Tobi explained that disk i/o is the bottleneck. We
already have pretty fast disks so one suggestion was to go to RAMDISK which
would create a virtual disk in RAM and occasionally copy it to the hard drive
so the rrd files would not be lost if the machine went down for some
reason. I suspect this would speed the process up dramatically as I have
found that we can query about 34,000 Targets and get the responses back in
about 30 seconds. We have the memory installed but have not tested the
RAMDISK solution yet. Has anyone else tried that?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have also been looking at Cacti and noticed that there is
a plug-in called “boost” that seems to perform the RAMDISK
function. It stores the rrd info in memory until it can write it to disk
later. Since it is performing this for an RRD based system I imagine it
would be easy to adapt for MRTG. Has anyone tried “boost”?
Adapting boost to MRTG would be beyond my programming skills but I wondered if
anyone knew enough about this to advise me on whether to ask our programming
team to look at such a project.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Duane Perry<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>University</span></font></st1:PlaceType><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> of <st1:PlaceName
w:st="on">Missouri</st1:PlaceName></span></font></st1:place><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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