Marco Marongiu wrote: >In fact, if my understaning was right, rra[0] is the archive with the >highest resolution, being: > >rra[0].pdp_per_row = 1 >rra[1].pdp_per_row = 6 >rra[2].pdp_per_row = 2 >rra[3].pdp_per_row = 288 > >What happens is that the archive returns data as if the highest >resolution was 600, not 300 (this happens whether I use -r or not, and >is concordant with the manual): > >$ rrdtool fetch /tmp/x*.rrd AVERAGE -s 1288566000 -e 1291158000 -r 300 | >head
OK, there is a bit of information missing here - how many consolidated data points are being kept for each resolution ? If I point out that (1291158000 - 1288566000)/300 is 8640, and then direct you to the lines showing "rra[n].rows = " below, does that help ? >filename = "/tmp/x01-03_cpu_idle_3677.rrd" >rrd_version = "0003" >step = 300 >last_update = 1290615226 >ds[cpu_idle].type = "COUNTER" >ds[cpu_idle].minimal_heartbeat = 600 >ds[cpu_idle].min = 0,0000000000e+00 >ds[cpu_idle].max = 1,0000000000e+04 >ds[cpu_idle].last_ds = "258249960" >ds[cpu_idle].value = 3,5498196667e+05 >ds[cpu_idle].unknown_sec = 0 >rra[0].cf = "AVERAGE" >rra[0].rows = 600 >rra[0].cur_row = 599 >rra[0].pdp_per_row = 1 >rra[0].xff = 5,0000000000e-01 >rra[0].cdp_prep[0].value = NaN >rra[0].cdp_prep[0].unknown_datapoints = 0 >rra[1].cf = "AVERAGE" >rra[1].rows = 700 >rra[1].cur_row = 699 >rra[1].pdp_per_row = 6 >rra[1].xff = 5,0000000000e-01 >rra[1].cdp_prep[0].value = 3,2111851609e+03 >rra[1].cdp_prep[0].unknown_datapoints = 0 >rra[2].cf = "AVERAGE" >rra[2].rows = 9216 >rra[2].cur_row = 9215 >rra[2].pdp_per_row = 2 >rra[2].xff = 5,0000000000e-01 >rra[2].cdp_prep[0].value = 0,0000000000e+00 >rra[2].cdp_prep[0].unknown_datapoints = 0 >rra[3].cf = "AVERAGE" >rra[3].rows = 797 >rra[3].cur_row = 796 >rra[3].pdp_per_row = 288 >rra[3].xff = 5,0000000000e-01 >rra[3].cdp_prep[0].value = 3,1040640971e+05 >rra[3].cdp_prep[0].unknown_datapoints = 0 In other words, you are asking for a graph of 8640 values from a data set that only contains 600. The 'best' data set that contains the number of data points (or rather, covers the time interval) asked for is the third which consolidates 2 PDPs into a CDP with a resolution of 600s. -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
