On Wed, Mar 10, 2004 at 06:08:25PM +0100, Bart Duchesne wrote: > The only thing I specify is --start --end with the correct timestamps to > draw a day,week,month,year graph.
You know the amount of time (s). You know the average items per second (x/s). Basic math: for any s not equal to zero: (x/s)*s = x 10 items per second (on average) for 20 seconds? That will be 200 items in those 20 seconds. The step size, the number of steps per PDP, the number of PDPs per CDP: all of these are irrelevant just as long as you _know_ (not: guess) the amount of seconds. In order to be able to know the amount of seconds, you need to be sure about the start and end times. To be sure of those, you need to know the boundaries and thus you need to know, when calling rrdtool, what the properties of each RRA are. By this I mean RRDtool will magically alter your start and end times if they are not on RRA-boundaries. Thus you think you know the amount of time graphed yet your numbers are inaccurate. By carefully specifying start and end (or: start and duration, or end and duration) you can avoid this problem -> you _know_ the interval. Alex -- begin sig http://www.googlism.com/index.htm?ism=alex+van+den+bogaerdt&type=1 This message was produced without any <iframe tags -- 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
