Marc, Today Marc MERLIN wrote:
> http://gargamel.merlins.org/cacti/graph.php?action=properties&local_graph_id=39&rra_id=0&view_type=tree&graph_start=1258302354&graph_end=1258315217 > > and just in case my data samples were somehow bad (and I checked the source, > they're not), the same thing happened at the same time on another data > source at the same exact times: > > http://gargamel.merlins.org/cacti/graph.php?action=properties&local_graph_id=40&rra_id=0&view_type=tree&graph_start=1258302354&graph_end=1258315217 > > There is just no way it's a concidence. > Also I noticed that what shows up is a data sample with twice the value it > should have and then the next sample is pretty much 0. > > The graph definitions are in the links and the rrd was created like so: > /usr/bin/rrdtool create /var/lib/cacti/rra/housepower_21.rrd --step 120 \ > DS:HouseNoAC:DERIVE:600:-1000000000:1000000000 > DS:House:DERIVE:600:-1000000000:1000000000 \ > DS:PGE:DERIVE:600:-1000000000:1000000000 > DS:AC:DERIVE:600:-1000000000:1000000000 \ > DS:PV:DERIVE:600:-1000000000:1000000000 \ > RRA:AVERAGE:0.5:1:2628000 RRA:AVERAGE:0.5:1440:10950 > RRA:AVERAGE:0.5:5:3153600 \ > RRA:AVERAGE:0.5:30:525600 RRA:AVERAGE:0.5:120:131400 \ > RRA:MAX:0.5:1440:10950 RRA:MAX:0.5:30:525600 RRA:MAX:0.5:120:131400 \ > > I'm just trying to understand what could make these data problems possible. > My original data on disk (before it was fed to the rrd) is correct. > Even if there was a time delay in when the data was given, rrdtool knows how > to interpolate > data to make things right, so I don't get it. > > Any ideas? you are talking about 'original' data, are you feeding the data to rrdtool INCLUDING the collection time, or are you just using N: the graph looks as if there was some bad case of jitter at work ... two samples being 'faked' into one slot ... cheers tobi > > Thanks, > Marc > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch [email protected] ++41 62 775 9902 / sb: -9900 _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
