Exactly! The data come in at an unknown timing. That is why I had them updated at "random" time and different interval. I read about the comparison between heartbeat and step, and didn't seem to find a way around it. In the document written by Don Baarda, it says,
".....If the interval between samples is longer than "heartbeat", the entire interval is considered "unknown"......." Meanwhile, I am not clear about whether this includes the end points of the interval if they are primary data points in an RRD. Serge was right on the data I tried to updated, 7200 is greater than 3600, but I would think RRDTool can be smart enough to determine 99417900 is unknown while 994176000 is 3 and 994183200 is 1, instead of thinking everything in the interval including the end points are unknown. Due to the nature of the data, if RRDTool cannot help, maybe I will need to artificially put a "0" for every missing heartbeat. This isn't hard but is definitely making my job more trivial. Thanks, folks! Chang-Ping > 994176000:3 994183200:1 994190400:1 994194000:4 994197600:4 994201200:5 \ > 994204800:4 994212000:8 994215600:1 994219200:1 994255200:1 994258800:2 \ > 994262400:4 994266000:2 994269600:3 994273200:2 \ > missing-> 994176000: NaN > 994179600: NaN > missing-> 994183200: NaN > 994186800: NaN > missing-> 994190400: NaN > 994194000: 4.0000000000e+00 > 994197600: 4.0000000000e+00 > 994201200: 5.0000000000e+00 > 994204800: 4.0000000000e+00 > 994208400: NaN > missing-> 994212000: NaN > 994215600: 1.0000000000e+00 > 994219200: 1.0000000000e+00 > 994222800: NaN > 994226400: NaN > 994230000: NaN > 994233600: NaN > 994237200: NaN > 994240800: NaN > 994244400: NaN > 994248000: NaN > 994251600: NaN > missing-> 994255200: NaN > 994258800: 2.0000000000e+00 > Hmm, what I do see is that you have a heartbeat of 3600 secs. Your > updates (at least the first two ones, didn't check the other ones) on > the other hand are made with a 7200 sec interval. This is > well over the > heartbeat threshold, so rrdtool will take the value for a NaN. > -----Original Message----- > From: Chris Snell [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 05, 2001 6:48 PM > To: Chang-Ping Hsiao; Rrd-User (E-mail) > Subject: Re: [rrd-users] Help needed on rrdtool create and rrdtool > update > > > > I took a quick glance at your rrdupdate and it looks like you are > occasionally updating at an interval different from your --step. > > >the RRDs after update. Could anyone help? I can't seem to > find where the > >problem is. Did I make some mistakes in "rrdtool create", "rrdtool > >update", or "rrdtool fetch"? > __________________________________________ NetZero Platinum No Banner Ads and Unlimited Access Sign Up Today - Only $9.95 per month! http://www.netzero.net -- 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