[rrd-users] Create Graph with 2 "AREA"

[Martin Friberg]

just found my own error

in update file "$RRDTOOL update $FILE N:$UPDATECMiD2"
a "i" snuck in there now i get a better result :) now i just gotta 
figure out how to shade the otherone

thanks for the input :)

Simon Hobson skrev 2012-08-18 00:31:
> Martin Friberg wrote:
>
>> yes itried that but for some reason it still goes up on the axis
>>
>>
>>
>> code to generate the db
>>
>> $RRDTOOL create $FILE -s 60 \
>> DS:ping:GAUGE:120:0:65535 \
>> RRA:AVERAGE:0.5:1:2880
>>
>>
>> code to update db
>>
>> UPDATECMD=$(ping -c 3 -w 6 $HOST | grep rtt | awk -F "/" '{ print $5 }' )
>> $RRDTOOL update $FILE N:$UPDATECMD
>>
>> UPDATECMD2=$(ping -c 3 -w 6 $HOST2 | grep rtt | awk -F "/" '{ print
>> $5 * -1 }' )
>>
>> $RRDTOOL update $FILE N:$UPDATECMiD2
> And what have you in the file after this ? I suspect not what you want.
>
> First, I wouldn't munge the data before storing it. Your ping times
> aren't negative, so don't store them as such. Do the negation when
> you plot the data - which also means you have the right data should
> you decide later (after perhaps collecting a year of history) that
> you need something different.
>
> Secondly, I can't see what you are trying to achieve here. I can only
> see you updating one file.
>
>
>> code to generate graph
>>
>> $RRDTOOL graph $OUTPUT \
>>          -t "WAN Ping" -v "Time in ms" \
>>          --start="now-1d" \
>>          --end="now" \
>>          --height="320" \
>>          --width="640" \
>>          -c "BACK#000000" \
>>          -c "SHADEA#000000" \
>>          -c "SHADEB#000000" \
>>          -c "FONT#DDDDDD" \
>>          -c "CANVAS#202020" \
>>          -c "GRID#666666" \
>>          -c "MGRID#AAAAAA" \
>>          -c "FRAME#202020" \
>>          -c "ARROW#FFFFFF" \
>>          "DEF:ping_time=$FILE:ping:AVERAGE" \
> Where's the data for the second host ?
> If you bung in something like this, it will convert your positive
> data to negative :
>
>       CDEF:ping_inv=ping_time,-1,*
>
> and then use ping_inv where you've referenced ping_time in later statements.
>
>>          "CDEF:shading2=ping_time,0.98,*" "AREA:shading2#F90000:$HOST" \
>>          "CDEF:shading3=ping_time,0.98,*" "AREA:shading3#fff000:$HOST2" \
> Is there a reason for knocking 2% off your values ?
>