Hi, I'm having troubles creating an rrd-db. I hope someone can point me in the right direction. I have a photovoltaic system I'm monitoring. At the moment I can make nice graphs of the instantanious production, this means the power the station is generating at a given moment. I poll the station about every 15 seconds. Another value is the total produced energy. This is where my problem is. I created this rrd : rrdtool create etot.rrd --start 1206187000 --step 15 \ DS:ETOT:COUNTER:30:0:10000000 \ RRA:MAX:0.5:1:5760 \ RRA:MAX:0.5:5760:7 \ RRA:MAX:0.5:5760:31 \ RRA:MAX:0.5:5760:366
What I would like to get is graphs of the energy-production per day, so the value "last measurement of the day" - "first measurement of the day", displayed per week, month, year. When I enter the values (also at 15 seconds interval), I get unexpected results in the graph. I get results mostly is the milli-range, while all the values I enter are by now 4.5 million (Wh produced). What am I missing here ? When I dump the rrd, I also get values in the milli-range. Could it be that the values in the rrd are the difference between the input values ? The values that are entered don't change much in 15 seconds, many times, the difference is zero. How can I solve this ? Thanks for any pointers. Regards, Koenraad Lelong. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
