Hi, I think he is asking why if he request a 30s resolution, the rrdtool output is 10s resolution and not 30s if 30s is multiple of the start time and end time.
I just have the same "bug". These is my rrd database info (see at the bottom of reply). I store a sample every minute and then for every 15 samples I store another one, so an average sample is stored every 15min/900s, isn't it? And I want to extract from de database 720 samples of the last two days, so if in two days there are 2880 samples of 1minunte/60s: 2880/720= 4. I should use 240 of resolution (60x4=240s to get 720 samples in two days). It seems very easy but it isn't working and i don't understand why. rrdtool fetch database.rrd AVERAGE -r 240 -s 1299672960 -e 1299845760 The command above outputs me 2880 samples which are each one stored every minute during the 2days interval. I tried to use the solution given on the documentation rrdtool fetch page but neither is working, it also outputs me 2880 results instead of 720. Look i'm using a start and end time multiple of 240. TIME=1299845760 RRDRES=240 rrdtool fetch database.rrd AVERAGE -r $RRDRES -e $(($TIME/$RRDRES*$RRDRES)) -s 1299672960 Could anyone explain me what i'm not doing well? Or maybe it is not possible? Thank you very much. Regards. Xavier. RRD DB INFO: filename = "database.rrd" rrd_version = "0003" step = 60 last_update = 1300104363 header_size = 2764 ds[ds1].index = 0 ds[ds1].type = "COUNTER" ds[ds1].minimal_heartbeat = 180 ds[ds1].min = 0.0000000000e+00 ds[ds1].max = 1.2500000000e+07 ds[ds1].last_ds = "4197984233" ds[ds1].value = 1.8098835251e+06 ds[ds1].unknown_sec = 0 ds[ds2].index = 1 ds[ds2].type = "COUNTER" ds[ds2].minimal_heartbeat = 180 ds[ds2].min = 0.0000000000e+00 ds[ds2].max = 1.2500000000e+07 ds[ds2].last_ds = "1946349096" ds[ds2].value = 9.8436039122e+05 ds[ds2].unknown_sec = 0 rra[0].cf = "AVERAGE" rra[0].rows = 225000 rra[0].cur_row = 78456 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[0].cdp_prep[1].value = NaN rra[0].cdp_prep[1].unknown_datapoints = 0 rra[1].cf = "AVERAGE" rra[1].rows = 60000 rra[1].cur_row = 57228 rra[1].pdp_per_row = 15 rra[1].xff = 5.0000000000e-01 rra[1].cdp_prep[0].value = 2.9175424566e+06 rra[1].cdp_prep[0].unknown_datapoints = 0 rra[1].cdp_prep[1].value = 2.8180050584e+06 rra[1].cdp_prep[1].unknown_datapoints = 0 rra[2].cf = "AVERAGE" rra[2].rows = 20000 rra[2].cur_row = 9797 rra[2].pdp_per_row = 60 rra[2].xff = 5.0000000000e-01 rra[2].cdp_prep[0].value = 2.9175424566e+06 rra[2].cdp_prep[0].unknown_datapoints = 0 rra[2].cdp_prep[1].value = 2.8180050584e+06 rra[2].cdp_prep[1].unknown_datapoints = 0 rra[3].cf = "AVERAGE" rra[3].rows = 10000 rra[3].cur_row = 7454 rra[3].pdp_per_row = 720 rra[3].xff = 5.0000000000e-01 rra[3].cdp_prep[0].value = 2.9175424566e+06 rra[3].cdp_prep[0].unknown_datapoints = 0 rra[3].cdp_prep[1].value = 2.8180050584e+06 rra[3].cdp_prep[1].unknown_datapoints = 0 -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/rrdtool-fetch-with-computed-resolution-tp1072059p6168979.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
