----- Original Message ----- From: "Chris Nighswonger" <cnighswon...@foundations.edu> To: <rrd-users@lists.oetiker.ch> Sent: Thursday, March 24, 2011 6:47 PM Subject: [rrd-users] DEF/CDEF Average Question
>I have data that I want to average in 15 min windows. The caveat here > is that the windows must start at 0 min, 15 min, 30 min, and 45 min of > each hour. > > I can do > > DEF:x=foo.rrd:bar:AVERAGE:step=900 > > But if foo.rrd starts at 5 min past the hour, my window is skewed. If you have an RRA with step*steps == 900, then RRDtool will do the work for you. For instance: if step==300 (5 minutes) and steps==3, the time in each RRA row is 900 seconds. All rows will start at n*300, which happens to be hh:00, hh:15, hh:30 and hh:45. HTH Alex _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
