ok, but home come when i graph:
rrdtool graph /var/www/html/rrdtool/eth0.gif \
--start -1800 --vertical-label bytes/second \
--title "eth0 Traffic Monitor" \
DEF:inoctets=/var/www/html/rrdtool/eth0.rrd:input:AVERAGE \
DEF:outoctets=/var/www/html/rrdtool/eth0.rrd:output:AVERAGE \
CDEF:over=outoctets,20000,GT,outoctets,20000,-,0,IF \
HRULE:20000#0F0000:"Limit of Sensible Load" \
LINE2:inoctets#00FF00:"In traffic" \
AREA:outoctets#0000FF:"Out traffic" \
STACK:over#FF0000:"Over speed"
the red stack is drawn 5000 points higher than the horizontal line?
shouldn't they be the same? also, I think this 5000 is relative to the AREA
On Sat, Oct 26, 2002 at 05:24:18 +0200, Alex van den Bogaerdt wrote:
>
> On Sat, Oct 26, 2002 at 03:59:34PM +0100, Mat Harris wrote:
> > DEF:myspeed=test.rrd:speed:AVERAGE \
> > "CDEF:kmh=myspeed,3600,*" \
> > CDEF:fast=kmh,100,GT,100,0,IF \
> > CDEF:over=kmh,100,GT,kmh,100,-,0,IF \
>
> Always have the manual page at hand. Do exactly what RRDtool
> would do and calculate the stuff by hand.
>
> CDEF:over=kmh,100,GT,kmh,100,-,0,IF
>
> GT does this: if a>b return 1 else return 0
> and is wriiten down like this: a,b,GT
>
> - does this: return a - b
> and is written down like this: a,b,-
>
> IF does this: if a then b else c
> and is written down like this: a,b,c,IF
>
>
> Work from left to right: CDEF:over=kmh,100,GT,kmh,100,-,0,IF
> CDEF:over= create new variable called over
> kmh get variable kmh and store on stack
> The stack contains one value
> 100 store 100 onto stack
> The stack contains two values
> GT function! get the variables a and b and store the result
> Two elements are removed from the stack (leaving none), then
> the result of the GT function is pushed back
> The result is now 1 if kmh is greater than 100
> kmh get variable kmh and store on stack
> The stack contains two values: the result of GT and the
> variable kmh.
> 100 store 100 onto stack
> The stack contains three values
> - function! get the variables a and b and store the result
> Two elements are removed from the stack (kmh and 100), then
> the result of the '-' function is pushed back
> 0 store 0 onto the stack
> The stack now contains: (result of GT),(kmh-100),0
> IF function! Remove a,b and c from the stack (which is then
> empty) and return either b or c, depending on a.
>
> In other words:
> CDEF:over=kmh,100,GT,kmh,100,-,0,IF
> means
> if (kmh > 100)
> then
> return kmh-100
> else
> return 0
> fi
>
>
> No more additional examples. I'm having a case of deja vu at the moment.
>
> --
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[EMAIL PROTECTED] matthewh.genestate.com
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