Hello Simon, thanks for your comments...
> It does the best it can to use the most detailed data. Looking at the > docs, I don't see any > option to override that. I saw a similar setup on Link <http://www.kompf.de/weather/technik.html > and there are also a 2 RRA; the example graph showed the correct average line: average of all values of a single day. Maybe I try to contact him if there is any "trick" involved. Do you see any trick to create a single data point per day with the average value (temperature)? > Looks more like an hour to me, are you on +1 timezone by any chance ? Yes, I am in UTC+1 timezone... So data consolidation is always done based on UTC+0 timezone. I am using the following unix statements to get the timestamp: set $(date "+%Y %m %d %H %M") m=$((100+15*(${5#0}/15))) timestamp_rounded="$1$2$3 $4:${m#1}" timestamp_rounded_unix=$(date --date "$1$2$3 $4:${m#1}" +%s) timestamp_real=$(date "+%Y%m%d %H:%M") timestamp_real_unix=$(date --date "$timestamp_real" +%s) If I check my own logfiles, i can see: I106 rrdtool update /testtemp/temp_pool.rrd 1403702100:23.5:22.6:29.8:23.5:23.9:1:1:50.8 I103 20140625 15:15 --> this is my time, UTC+1 CEST 1403702100 translates into 25.06.2014 - 15:15:00 So the algorithm from a rrdtool perspective uses my time as UTC+0 time. I still cannot explain this 1h offset in the graph... > Are you certain you are updating frequently enough ? The reason here was a downtime due to maintenance work. Well, as I understand it, the RRA function tolerates with SSF 0.5, that 50% of data points may be missing. As you can see in the graph, there are a few values missing, but not 50% (48 data points out of 96). Or does the max function return no values, if the data vector contains unknowns? -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/wrong-rra-used-tp7582214p7582216.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
