Hi there I have any issue with creating a graph definition for total amounts of data over a given period for a network interface.
I have followed Tobi's advice on this stackoverflow page https://stackoverflow.com/questions/31812055/how-do-i-create-accumulated-bandwidth-usages-in-rrdtool-ie-gbs-per-month-down however the issue I have is that when I view the graph for a daily time period the amount of data reported is too low but when I view at higher resolutions, for example a 20 minute interval the graph is correct. I have a test box downloading a 1MB file every minute. So I would expect 1440MB in a day at least but the graph on the daily view is only getting to around 600MB. The output of an rrdtool info command is filename = "1-172.31.10.154-ifInOctets_2_60.rrd" rrd_version = "0003" step = 60 last_update = 1509008361 header_size = 1624 ds[ifInOctets].index = 0 ds[ifInOctets].type = "COUNTER" ds[ifInOctets].minimal_heartbeat = 60 ds[ifInOctets].min = 0.0000000000e+00 ds[ifInOctets].max = NaN ds[ifInOctets].last_ds = "1874997951" ds[ifInOctets].value = 4.5357725000e+05 ds[ifInOctets].unknown_sec = 0 rra[0].cf = "AVERAGE" rra[0].rows = 129600 rra[0].cur_row = 47102 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 = 38880 rra[1].cur_row = 30630 rra[1].pdp_per_row = 10 rra[1].xff = 5.0000000000e-01 rra[1].cdp_prep[0].value = 1.9536071167e+05 rra[1].cdp_prep[0].unknown_datapoints = 0 rra[2].cf = "AVERAGE" rra[2].rows = 52560 rra[2].cur_row = 35410 rra[2].pdp_per_row = 30 rra[2].xff = 5.0000000000e-01 rra[2].cdp_prep[0].value = 6.2954044167e+05 rra[2].cdp_prep[0].unknown_datapoints = 0 rra[3].cf = "MAX" rra[3].rows = 129600 rra[3].cur_row = 47102 rra[3].pdp_per_row = 1 rra[3].xff = 5.0000000000e-01 rra[3].cdp_prep[0].value = NaN rra[3].cdp_prep[0].unknown_datapoints = 0 rra[4].cf = "MAX" rra[4].rows = 38880 rra[4].cur_row = 30630 rra[4].pdp_per_row = 10 rra[4].xff = 5.0000000000e-01 rra[4].cdp_prep[0].value = 2.1791705000e+04 rra[4].cdp_prep[0].unknown_datapoints = 0 rra[5].cf = "MAX" rra[5].rows = 52560 rra[5].cur_row = 35410 rra[5].pdp_per_row = 30 rra[5].xff = 5.0000000000e-01 rra[5].cdp_prep[0].value = 2.1791705000e+04 rra[5].cdp_prep[0].unknown_datapoints = 0 So for my CDEF I'm using 60 as the step. My graph definition is "DEF:inOctAve=$in_bytes:ifInOctets:AVERAGE", "DEF:outOctAve=$out_bytes:ifOutOctets:AVERAGE", "CDEF:outOctT=outOctAve,60,*,PREV,ADDNAN", "CDEF:outOctTMB=outOctT,1000000,/", "CDEF:inOctT=inOctAve,60,*,PREV,ADDNAN", "CDEF:inOctTMB=inOctT,1000000,/", "LINE1:outOctTMB$COLOURS[0]:Total Outgoing (MB)\\l<file:///\\l>", "LINE1:inOctTMB$COLOURS[1]:Total Incoming (MB)\\l<file:///\\l>", "COMMENT:\\l", "COMMENT:\\s", "GPRINT:outOctTMB:LAST:Total Outgoing\\: %0.1lf (MB)\\l<file:///\\l>", "GPRINT:inOctTMB:LAST:Total Incoming\\: %0.1lf (MB)\\l<file:///\\l>", Any help much appreciated. Thanks Richard
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