Now we're getting close to a problem of mine - sorry to mix it up: I do have a lot of rrd's with data which I want to add up. I do that with rrdcgi to make a graph of the sum. This usually works fine - unless there is an 'unknown' value in the originating rrd's. This will make the sum unknown and I get no printout.
Do anybody know if it's possible to require: 'Treat unknown as zero'? Or how should I circumvent the problem? The task comes from wanting a total of all the connections to a switch - but if a new interface is used, the 'old' total will be ruined as the new interface has 'unknown' values ahead of doing mrtg. Jan Ferré McDonald, Dan wrote: > On Wed, 2009-02-11 at 05:19 -0800, pvh wrote: > >> Hello, >> >> I've recently had to install MRTG on Windows with the latest ActivePerl at >> work to monitor a server. >> What I'm doing is graphing all active interfaces (as per the default >> cfgmaker configuration), and I added a totals graph which is simply >> something like that: >> 1:commun...@ip + 2:commun...@ip + 3:commun...@ip .. >> > > So, when one counter rolls over, mrtg has no way of knowing (and > correcting) > > >> I'm working with fast ethernet interfaces (all 32 bit counters) here. >> > > Thus rollovers are frequent. > > The only way to accurately do this is to collect the three counters > separately, and use routers2.cgi (or some other similarly enlightened > front end, but there aren't any others published with this feature) and > build a stacked graph to show the actual total. > > Note that that requires RRDtool as a backend > > > ------------------------------------------------------------------------ > > _______________________________________________ > mrtg mailing list > [email protected] > https://lists.oetiker.ch/cgi-bin/listinfo/mrtg > -- Jan Ferré - UNI-C Netdrift - DTU Bygning 304, DK-2800 Lyngby tlf. +45 3587 8935, cell. +45 2160 8012, fax. +45 3587 8990 EAN-no.: 5798000555198 _______________________________________________ mrtg mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/mrtg
