[rrd-users] Re: Graphing total bandwidth usage

[Simon Amor]

On Thu, Mar 02, 2000 at 05:04:07PM +0100, alex at ergens.op.Het.Net wrote:
> Simon Amor wrote:
> > 
> >  I've just started using RRDtool-1.0.13 to log byte counts for each port on
> > each switch so we can monitor bandwidth for each server. The values are
> > combined in/out bytes instead of separate, but this isn't too much of a
> > problem. When I try and graph the information, I end up with what looks like
> > deltas rather than absolute values.
> 
> That is correct.  They look like delta's but in fact they represent the
> delta of the data divided by delta of the time.  This way, you should
> end up with octets per second.
> If you want to log your actual counter values, you should use the GAUGE
> data type, not the COUNTER.  Even in that case, you may end up with
> values that are not exactly what you put in the RRD (due to interpolation)

If I use rrdtool tune to change the type from COUNTER to GAUGE, do I need to
zero the rrd to get rid of data which isn't absolute values or does it store
the actual absolute value and calculate deltas when generating the graph?
 
  Simon
-- 
Simon Amor
simon.a at webfusion.co.uk

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