Hi 2009/12/5 A Darren Dunham <[email protected]>: [snip] > You can change the RRA's consolidation function at the top easily to see > how if it were AVERAGE already, there's no differences between the > second two graphs. > > Hopefully that demonstrates the differences pretty well.
It does ... thank you for enlighting me As I was thinking more into yesterday ; I too had felt that for AVERAGE is result would be quite obvious ; but for the MIN and MAX some issues would arise... Now I have an extra question on how the RRA/consolidation works... Say I store 5 years of 5 minutes average ; is there any points of also storing 5 years of 30 minutes average, 5 years of 2 hours average etc? I would have assumed that it wouldn't matter ; except when retrieving the 30 minutes/2 hours average extra processing is required as it needs to retrieve more values. Now; if I use reduce=AVERAGE for all my graph like DEF:total=currentcost.rrd:total:AVERAGE DEF:ch2=currentcost.rrd:ch2:AVERAGE \ DEF:solar=solarprod.rrd:total:AVERAGE DEF:ch1=currentcost.rrd:ch1:AVERAGE \ DEF:totalmin=currentcost.rrd:total:MIN:reduce=AVERAGE DEF:ch2min=currentcost.rrd:ch2:MIN:reduce=AVERAGE \ DEF:solarmin=solarprod.rrd:total:MIN:reduce=AVERAGE DEF:ch1min=currentcost.rrd:ch1:MIN:reduce=AVERAGE \ DEF:totalmax=currentcost.rrd:total:MAX:reduce=AVERAGE DEF:ch2max=currentcost.rrd:ch2:MAX:reduce=AVERAGE \ DEF:solarmax=solarprod.rrd:total:MAX:reduce=AVERAGE DEF:ch1max=currentcost.rrd:ch1:MAX:reduce=AVERAGE \ Do I even need to create the RRD with MIN and MAX ? or it can be all done from the AVERAGE RRD database ? In my case, I create the RRD with: 100 day of 1 minute average 5 years of 5 minutes average rrdtool create currentcost.rrd -s 60 \ DS:total:GAUGE:300:0:U \ DS:ch1:GAUGE:300:0:U \ DS:ch2:GAUGE:300:0:U \ DS:ch3:GAUGE:300:0:U \ RRA:AVERAGE:0.5:1:144000 \ RRA:AVERAGE:0.5:5:525600 \ RRA:MIN:0.5:1:144000 \ RRA:MIN:0.5:5:525600 \ RRA:MAX:0.5:1:144000 \ RRA:MAX:0.5:5:525600 Not creating a MIN and MAX one would reduce considerably the size rrd file. Here is my result so far ... You can click on parts of the graph to automatically zoom-in for extra details. http://htpc.avenard.org/power Thanks Jean-Yves _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
