[rrd-users] Re: don't know which datatype to choose

[Alex Prinsier]

first of all thanks all for the responses :)

I tried like you suggested, and I believe it works (well i got data and
a graph, i'm still testing to see if the data is indeed correct :)).

Still it makes little sense to me to first calculate the speed by which
packets go through the network, and then use that speed to calculate the
actual amount of data being transferred... i had that number from the
beginning... Perhaps my way would require a new kind of datatype.

Anyway I used those CDEF's like you suggested, and they seemed to work.
However suddenly (wouldn't know what triggered it) I get this error
message (twice) when creating a graph:

*** attempt to put segment in horiz list twice

What does it mean?

I'm executing this command:

$ /usr/local/rrdtool-1.2.11/bin/rrdtool graph
/home/aphex/public_html/xianc/output/teamspeak22.png --start 1125806400
--end 1125870681 --title "teamspeak2 (9/4/2005-9/4/2005)"
DEF:ts2in=/var/log/xianc/teamspeak2.rrd:ts2in:LAST
DEF:ts2out=/var/log/xianc/teamspeak2.rrd:ts2out:LAST
CDEF:ts2in2=ts2in,300,* CDEF:ts2out2=ts2out,300,*
AREA:ts2in2#FF0000:ts2in LINE1:ts2out2#00FF00:ts2out
*** attempt to put segment in horiz list twice
*** attempt to put segment in horiz list twice
481x179
$

Leaving out 'LINE1' makes the error messages disappear. What am I doing
wrong?

Thanks again,

Alex


Alex van den Bogaerdt wrote:
> On Sat, Sep 03, 2005 at 01:58:10AM +0200, Alex Prinsier wrote:
> 
> 
>>I want to create a rrd-db which I update with how much bytes have been
>>sent over the network. This counter doesn't reset when reading (like the
>>one from a router). In the end I want to know how much data has been
>>sent from one moment in time till another one.
>>
>>I could use the COUNTER type, but then I would get the actual speed of
>>the data getting transmitted, not the amount.
> 
> 
> If data is transfered at "x" bytes per second, during "y" seconds,
> then there is "x multiplied by y" bytes transfered.
> 
> This means you can get the average rate during an interval you want
> and multiply it by the amount of time.  Use CDEFs for this.
> 
> Together with Tobi's answer this should get you started.
> 
> cheers
> Alex
> 
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