Yes, Cacti can handle custom rrd setups like the one described below. There has been a discussion how to achieve custom setups every now and then in the Cacti Forum, so a search _should_ yield acceptable results on this topic. Reinhard
On 18.02.2014 16:05, Alex van den Bogaerdt wrote: > > There is nothing wrong with, for instance, setting steps==3600 and CF==MAX > to remember the highest temperature reported during an hour, and to have > this as the RRA with finest granularity. > > You could have two RRAs, one remembering MAX the other MIN, and then show > the temperature range seen suring any hour (e.g. a red area for the max > temperature seen, overlayed by a blue area for the minimum temperature > seen). > > Not sure if cacti can do this, that's for someone else to answer, but > RRDtool can do it. > > HTH > Alex > > > ----- Original Message ----- > From: "ENTRESSANGLE, ERIC (ERIC)" <eric.entressan...@alcatel-lucent.com> > To: <rrd-users@lists.oetiker.ch> > Sent: Tuesday, February 18, 2014 3:17 PM > Subject: [rrd-users] Input values normalization > > > Hello > > I would like the feedback of experienced rrdtool/cacti users about the > following point : > I think I understood that rrdtool works with rates (through counter, derive, > absolute types), and that in this case, the "normalization" step can make > sense. > > But I'm more doubtful about the "normalization" for gauge type, for example > when I graph a plain temperature, because it means that the temperature on > my graph is never exactly the real input value, unless data source step and > cacti's poller are perfectly synchronized, but it is impossible when there > are a lot of counters to retrieve. > > The solution I found is to set a data source step to 1 second to avoid > normalization, but this produces big rrd files with a lot of redundant > information. > > I did not find a satisfactory solution up to now, thanks for any hint. > > Regards > > Eric > > > > > > -------------------------------------------------------------------------------- > > >> _______________________________________________ >> rrd-users mailing list >> rrd-users@lists.oetiker.ch >> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users >> > > _______________________________________________ > rrd-users mailing list > rrd-users@lists.oetiker.ch > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users > _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
