Today you sent me mail regarding [rrd-users] xff and heartbeat: ED> ED> Hi all, ED> ED> as a newbie I have some problems in understanding the consolidation ED> parameters... ED> After reading the tutorial, the manuals and some mails in the mailinglist I ED> think I understand it more or less. But I would be very greatfull if someone ED> could verify that. ED> ED> The heartbeat defines the period within which should be an update, ED> otherwise there ED> will be an *UNKNOWN* asumed.
yes ED> ED> The xff defines how many *UNKNOWN* samples within the consolidation ED> interval (set by "steps" in ED> RRA?) can appear until an *UNKNOWN* and not the consolidated value is ED> stored to the RRA. ED> E.g. xff=0.5 => Only if there are 6 *UNKNOWN* out of 10 samples an ED> *UNKNOWN* is stored. ED> xff=0.0 => All *UNKNOWN* are stored. yes ED> ED> So, if I set my heartbeat to a very long period, the xff does almost have no ED> effect. On the other hand, if I set the heartbeat to a short period (e.g. ED> the step-size of the RRD) I will have a high probability of getting ED> *UNKNOWN* samples. Which I can decrease again setting xff high (e.g. ED> xff=0.9). note that the heartbeat only applies to the DS update ... until a PDP is built from the data ... the xff applies to the PDPs required for building one RRA row cheers tobi ED> ED> ED> Sorry for the strange way of summing it up, but I hope someone can ED> understand it and tell me if I finally understood it right. ED> ED> Thanks in advance, ED> Diana ED> ED> ED> -- ED> Unsubscribe mailto:[EMAIL PROTECTED] ED> Help mailto:[EMAIL PROTECTED] ED> Archive http://www.ee.ethz.ch/~slist/rrd-users ED> WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi ED> ED> -- ______ __ _ /_ __/_ / / (_) 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/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
