I would like to keep long-term sensor data in round robin archives for display over periods of - 10 years - 20 years - 40 years ( including short-term data of 2 days, 2 weeks and 2 years)
Based on Alex van den Bogaerdt' proposal the following rra creation seems appropriate to me # 40 years: # 7 archives # average over 1 measurement with 576 rows = 300 * 1 * 576/86400 = 2 d # average over 7 measurements with 576 rows = 300 * 4 * 576/86400 = 14 d # average over 30 measurements with 576 rows = 300 * 30 * 576/86400 = 60 d # average over 360 measurements with 576 rows = 300 * 360 * 576/86400 = 720 d ( 2 years) # average over 1826 measurements with 576 rows = 300 * 1826 * 576/86400 = 3652 d ( 10 years) # average over 3652 measurements with 576 rows = 300 * 3652 * 576/86400 = 7304 d ( 20 years) # average over 7304 measurements with 576 rows = 300 * 7304 * 576/86400 = 14608 d ( 40 years) # rrdtool create Temperature1_40years.rrd --step 300 \ DS:temperature:GAUGE:600:-100:100 \ RRA:AVERAGE:0.5:1:576 \ RRA:AVERAGE:0.5:7:576 \ RRA:AVERAGE:0.5:30:576 \ RRA:AVERAGE:0.5:360:576 \ RRA:AVERAGE:0.5:1826:576 \ RRA:AVERAGE:0.5:3652:576 \ RRA:AVERAGE:0.5:7304:576 Is this essentially correct or is there something I am missing ( assuming that I want images of 576 pixels)? What kind of rra are others using to hold long-term data? Any help is much appreciated. -- Volker Jahns, [email protected] _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
