[rrd-users] How to calculate desired value?
collector at sappers.de
Fri Aug 22 19:20:53 CEST 2014
I am currently working on a swimming pool control.
I store values every 15 min (precise timestamp; 16:15:00; 16:30:00; etc.)
and for every 15 min I store the "heat_flag", which is either "0" (heating
off) or "1" (heating on).
# rrdtool create temp_pool.rrd --step 900 --start "20140101 00:00" \
# DS:pump_flag:GAUGE:1200:0:1 \
# DS:heat_flag:GAUGE:1200:0:1 \
# DS:device:GAUGE:1200:0:90 \
# RRA:AVERAGE:0.5:1:103680 \
# RRA:MIN:0.5:96:3650 \
# RRA:MAX:0.5:96:3650 \
I would like to calculate the total heating time per day.
For that, I would like to find the number of "1" values per day.
In the end, multiply by 15min and I know the total heating time.
GPRINT:totalheattime:"Total\: %2.2lf h \n"'
but I get wrong results. I probably have to do the calculation completly
Can anyone help me out here?
I should get perfectly aligned values as a result: 0.25 h; 0.50h; etc.
How can I achieve this?
Thanks a million,
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