[mrtg] Re: Config File Size

[awatthey at mmm.com]

David,

My experiences are on NT4.

I monitor several hundred interfaces (and other things) and I find one 
config file per destination IP address is easier to handle.  This way I 
have the configs in different directories (under a source directory) and 
the results go to different directories as well (under a result 
directory).  I often use the same name for an interface on different 
routers (eg WAN) and MRTG doesn't like duplicates.

I use MRTGSVC to call a command file every 5 minutes and he cycles through 
all the directories calling MRTG for each config.

Seems to work well enough.  The Apache web server is quite happy scrolling 
through all the result sub-directories giving me the graphs I choose to 
see.  I don't use indexmaker.

I have still to play with RRDTOOL but it's on my list.

Alan.




"CHENG, DAVID (PB)" <dc4983 at sbc.com>
18/06/2002 16:02

 
        To:     mrtg at list.ee.ethz.ch
        cc:     (bcc: Alan Watthey/UK-Europe/3M/US)
        Subject:        [mrtg] Config File Size




Hi,

This might have been answered previously, but a quick search through the
archives did not yield the results I wanted.  Anyway, is there a practical
limit on the number of interfaces to monitor in a single config file?  For
instance, are there significant performance drop-offs if one config file
contains several thousand interfaces?  I believe that the data collection
probably isn't affected too much, but would the drawing of the graphs and
pages be affected by having to parse such a large config file?  Do people
have experience with how large they let their config files grow before
splitting them into different files?  I guess I'm looking for a trade-off
between many small files with many processes and larger files with fewer
processes.  I'm already using rrdtool to elimininate the time spent 
creating
graphs and such, so I guess I'm looking for a way to optimize my current
settings.  Any help that can be provided would be appreciated.

Best Regards,

David Cheng

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