I have noticed that rrdtool dump/fetch commands sometimes populate values as NaN even if I have written updates several times to rrd (with different timestamps).
"lastupdate" command shows that value was successfully written, but whats preventing it from being displayed? Please note, that I put single values into rrd few times a day, but the resolution is 600 seconds. So most of the values will be NaN, but why I get NaN for periods with updated values? here is the output: # rrdtool lastupdate testrrd.rrd 1383560879: 800.1103515625 # rrdtool fetch testrrd.rrd AVERAGE --start 1383559800 --end 1383565200 1383560400: -nan 1383561000: -nan 1383561600: -nan 1383562200: -nan 1383562800: -nan 1383563400: -nan 1383564000: -nan 1383564600: -nan 1383565200: -nan 1383565800: -nan # rrdtool info testrrd.rrd filename = "testrrd.rrd" rrd_version = "0003" step = 600 last_update = 1383560879 header_size = 792 ds[testrrd].index = 0 ds[testrrd].type = "GAUGE" ds[testrrd].minimal_heartbeat = 86400 ds[testrrd].min = NaN ds[testrrd].max = NaN ds[testrrd].last_ds = "800.1103515625" ds[testrrd].value = 1.0164953906e+05 ds[testrrd].unknown_sec = 0 rra[0].cf = "AVERAGE" rra[0].rows = 1095 rra[0].cur_row = 1009 rra[0].pdp_per_row = 144 rra[0].xff = 5.0000000000e-01 rra[0].cdp_prep[0].value = 4.6826486719e+04 rra[0].cdp_prep[0].unknown_datapoints = 0 rra[1].cf = "AVERAGE" rra[1].rows = 1152 rra[1].cur_row = 1014 rra[1].pdp_per_row = 1 rra[1].xff = 5.0000000000e-01 rra[1].cdp_prep[0].value = NaN rra[1].cdp_prep[0].unknown_datapoints = 0
_______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
