[rrd-users] Re: simulating mrtg graphs + 14all

[Rainer Bawidamann]

On 2002.01.20 22:30 Rainer Bawidamann wrote:
Hi!

> how would I use the 'rrdtool create'/'rrdtool update' tools to create an
> rrd containing samples just like mrtg does? i would like to feed this rrd
> to 14all ...

Search in the mrtg script/program for the string 'RRDs' and you will find
the args for the calls to create and update the .rdd files. For creation
you should use:

rrdtool create <filename.rrd> -b <begintime> -s <step>
                         DS:ds0:<dstype>:<minheartbeat>:0:<maxvali>
                         DS:ds1:<dstype>:<minheartbeat>:0:<maxvalo>
                         RRA:AVERAGE:0.5:1:600
                         RRA:AVERAGE:0.5:6:700
                         RRA:AVERAGE:0.5:24:775
                         RRA:AVERAGE:0.5:288:797
                         RRA:MAX:0.5:1:600
                         RRA:MAX:0.5:6:700
                         RRA:MAX:0.5:24:775
                         RRA:MAX:0.5:288:797

all on one line, step is normally 300 for mrtg/14all but that's not fixed.
Check the rrdtool documentation for the values of dstype, minheartbeat and
maxvali/maxvalo

Update is simple:

rrdtool update now:val1:val2

(where <now> can be the time of the measurement)

Rainer

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