On Sun, May 02, 2004 at 10:34:21AM +0200, Didier wrote: > Is is possible to get short term average directly in RRD tool ?
Just do this using your front end. Also, values in RRDtool _are_ short term averages. You're after the average of averages! I'll use the phrase "moving average" for what you asked for. > For example if we have 5 minutes between (t-1) and (t) ==> 20 > minutes represent 5 intervals of time 5 times 5 is 25 , not 20. > With A=average of v(t-7), v(t-6) , v(t-5) , v(t-4) , v(t-3) > B=average of v(t-6), v(t-5) , v(t-4) , v(t-3), v(t-2) > C=average of v(t-5), v(t-4) , v(t-3) , v(t-2), v(t-1) In the front end: A = B B = C C = D D = E E = current value from device F = (A+B+C+D+E)/5 rrdtool update your.rrd N:E:F To graph the current average, use E. To graph the moving average, graph F. HTH 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
