[mrtg] Re: mrtg vs rrdtool performance

[Neil Calvert]

>From my (brief) experience with RRDTool and reasonable MRTG experience,
the disadvantage of waiting for gif/png files to load is not really
worth worrying about.

The beauty of RRDTool is that you can generate graphs on the fly for any
date range for which you have data (something MRTG can't - you can't go
to MRTG and ask for data between 'January 2nd 5pm and January 2nd
Midnight'). In addition, simple cron or cgi scripts can be used to
create graphs at 5 minute intervals just like MRTG - so you get the
benefit of quicker polling runs and the benefit of semi-static graphs
like MRTG.

Course, I'm still ploughing through RRD to get it to the point I can
roll it out over a large network...

Just my 2c

Neil

-----Original Message-----
From: Bradford Woodcock <bwoodcoc at bbn.com>
To: mrtg at list.ee.ethz.ch <mrtg at list.ee.ethz.ch>
Date: Tuesday, January 11, 2000 11:57 AM
Subject: [mrtg] mrtg vs rrdtool performance


>Greetings,
>
>Given I will likely go to rrdtool at some point in the future because
it
>seems like the forward path I was curious about performance comparisons
>between mrtg/rrdtool. A couple points which I have picked up over time
from
>listening to this list are:
>
>- rrdtool generally performs better
>- rrdtool builds the gif's on demand (hence better system performance)
>
>If rrdtool does indeed build the gif's on demand I can see why system
>performance would be better. However one of the positives of mrtg is
that
>the gif's are pre-built and therefore "user access performance" to the
>graphs is excellent (albeit with overall scaling limitations).
>
>Could those who have run both mrtg/rrdtool please comment on the
comparison
>of performance from the "users" perspective when accessing the graphs
>between the two tools? Is there a perceived performance hit while
waiting
>for the graphs to be built with rrdtool?
>
>thanks in advance,
>brad...
>
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