[rrd-users] newbie basic help

Mario Ohnewald mario.ohnewald at gmx.de
Fri Aug 30 08:45:18 MEST 2002

I just read the tutorial and there are still a few things i dont understand.
rrdtool create test.rrd             \
            --start 920804400          \
            DS:speed:COUNTER:600:U:U   \
            RRA:AVERAGE:0.5:1:24       \

What has been created ?
We created the round robin database ...

- What does 920804400 stand for? For a time value or for a whole date (7th
of march, 1999)? If its the start time, it should alwas be the current time,
- COUNTER:600   his counter is read every five minutes. Well, what does 600
stand for? 10mins? 10 averages?

rrdtool update test.rrd 920804700:12345
                                  ^^^^ time where the value 12345 was

I want to use rrdtool to monitor my edonkey traffic. I will get the values
(bytes) from a iptables script.
I will run this script every 3 seconds to update the data base.
Do i need to run:
rrdtool creat test.rrd .... once?
rrdtool update test.rrd 920804700:$iptab_value ....  every 3seconds in my

cheers, Mario Ohnewald

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