On 05/09/2012 02:46 PM, Chris Mason wrote: > Hi, > > I can see this topic has come up before in the archives, but are there > any plans to have an independent right axis which isn't coupled to the > left that rrdtool can auto-scale? > > I am trying to plot "bits per second" on the left axis and "packets > per second" on the right axis for the same data. > On a graph I am plotting ifHCInOctets, ifHCInUcastPkts, > ifHCInBroadcastPkts and ifHCInMulticastPkts as well as the outbound > values. > > The relationship between "bps" and "pps" isn't always consistent as it > is determined by packet size (i.e. small packets will have a larger > pps rate than larger packets for the same bps). I understand that I > will probably have to have two passes of rrdtool to first fetch the > values before using them in the scale parameters. > > Assuming my left axis is scaled automatically then my data could range > from 1 bps to>10 Gbps. If I take some example data then my inbound > "pps" rate is usually a factor of 10,000 times smaller using the > following formula: > > (avg bps) / (avg pps) = scale factor > > However, if I try the same calculation for outbound traffic then I get > a scale factor of 1,500. > > Would anyone who has done something similar be willing to share what > they have done or give me some pointers on the best way to go about > this?
It may not apply 100% to what you want to do, but: http://www.netperf.org/svn/netperf2/trunk/doc/examples/bloat.sh does something similar to what you are describing (though for only two values). rick jones _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
