Today you sent me mail regarding Re: [mrtg-developers] Re: How many Routers...:
BN> Tobias Oetiker wrote: BN> > Today you sent me mail regarding [mrtg-developers] Re: How many Routers we...: BN> > BN> > 2. If the polling doesn't finish by 5 minutes, when cron tries to start BN> > BN> > the second mrtg what happens. BN> > BN> BN> > BN> The new job will die and the old one will finish. With rateup, this BN> > BN> wasn't a big problem, but with rrdtool the graphs gets really ugly. BN> > BN> > * can you elaborate on the 'ugly' bit ? BN> BN> With rateup, an unknown value is represented by the last known value BN> when the graph is drawn. rrdtool uses zero instead, and the graph may BN> not be continuous as it will drop to zero for every unknown value. BN> BN> Also, this seems to be a problem when detecting errors in the statistics. BN> An line with no traffic is quite usual, a line which has flatlined on, BN> say, 6.4Mbps, will be notices immediately. This is just psychological; BN> the more green the easier to spot an error. :-) well in rrdtool you can do even better, by writing a CDEF which looks out for UNKNOWN and produces a high value when the imput is unknown and UNKNOWN when the value is normal ... you can then drwa the result of the cdef as a LINE3: in red ... and unknown will suddenly become VERY noticable ... check the rrdtool mailinglist archives this has been discussed at length ... cheers tobi BN> > * you may want to use the daemon mode then the mrtg will run BN> > continuously if it does not finish withing the interval BN> BN> Yes, I did consider that, however a few problems arose: BN> BN> - What *if* the daemon dies? (I would need to write a wrapper) BN> - What if the config file changes? (It does every 3 hours) BN> BN> I think I had a few other points to when I chose not to run in BN> damon mode, but I can't remember them now. Anyway, I will re- BN> consider it some time when things cool down a little here. BN> BN> -- ______ __ _ /_ __/_ / / (_) Oetiker, Timelord & SysMgr @ EE-Dept ETH-Zurich / // _ \/ _ \/ / TEL: +41(0)1-6325286 FAX:...1517 ICQ: 10419518 /_/ \.__/_.__/_/ [EMAIL PROTECTED] http://ee-staff.ethz.ch/~oetiker -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg-developers
