So I'm looking at the fetch algorhithm for determining the RRA to use, and it appears that selection of an RRA that is a multiple of another is impossible unless you expand the time range to a period where both don't have data.
Example: RRA - 5 minute average, 30,000 entries RRA - 30 minute average, 3,000 entries RRA - 2 hour average, 300 entries So let's say that I want to get the 30 minute average for yesterday noon to today noon only: All three of the following queries return the exact same result (5 minute average) rrdtool fetch datafile.rrd AVERAGE ds0 -s end-1d -e 12:00 -r 300 rrdtool fetch datafile.rrd AVERAGE ds0 -s end-1d -e 12:00 -r 1800 rrdtool fetch datafile.rrd AVERAGE ds0 -s end-1d -e 12:00 -r 7200 Dropping the "-r" or using an off time naturally returns the 1-minute values for the same period. Obviously I could get the 5-minute average if I wanted it by using -e 12:05 but there's no 30 minute average that isn't also a 5 minute average. -- Jo Rhett senior geek Silicon Valley Colocation -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
