[rrd-users] Re: I need help to calculate % of max bandwidth !!!

[Alex van den Bogaerdt]

Iain Buchanan wrote:

> DEF:trend=data.rrd:bitsin:AVE
> CDEF:pctrend=57600,trend,/,100,*
> LINE1:pctrend
> GPRINT:pctrend:AVE:%.2f

You can skip the LINE1 here, unless you use it for other purposes.

Drawing an invisible line is, AFAIK, only useful together with STACK.

Another thing:
> (this is the percent, assuming your max bandwidth is a 56k modem)

1) 56k is 56k, not 57.6k
2) the percentage is   trend/max * 100  , not   max/trend * 100

So: CDEF:pctrend=trend,56000,/,100,*

It can be changed into: CDEF:pctrend=trend,560,/
This is because   x/y *100  == x/(y/100) 

cheers,
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