re-posting the question in the hope to find some help ...
Hi there, I'm pretty familiar with rrdtool & graph so far but I have a problem I wasn't able to solve yet and could use some help: I need to mimick the COUNTER behavior on GAUGE stored values. The rrd recording mechanism can't be changed, so I need to do it on the graphing end. What I have is a GAUGE number of items that gets recorded every few seconds but changes *infrequently*. What I want is a graph that shows an average rate for the period. Example: 12:00:05 200 12:00:10 260 12:00:15 260 12:00:20 260 12:00:25 260 12:00:30 340 At the step from :25 to :30 I have a change of 80, but 260 was there for 20 seconds (:10 .. :30) so the average is 80/20 = 4/s So rather than having a graph that shows [ CDEF:graph=val,PREV(val),- ] 12:00:05 UNKN 12:00:10 60 12:00:15 0 12:00:20 0 12:00:25 0 12:00:30 80 I'd like to have a graph that shows the equivalent for the sentence "between 12:00:10 and 12:00:30 I had a rate of 4/s" 12:00:05 UNKN 12:00:10 UNKN 12:00:15 4 12:00:20 4 12:00:25 4 12:00:30 4 The problem is the changes are *infrequent*, so sometimes I get a new value after 5secs, sometimes after 2min etc. so I always have to calculate 'backwards' from the current change to the previous change. The problem is that I don't know the time span of the period before I reach the end, but I can't step back to fill the graph for the time span just passed. Easy to do in Excel but (so far) almost impossible with rrdgraph. I guess the solution means shifting the data on the x-axis to be able to 'peek in the future' but still I don't know how far I should go. However, If I go far enough (like 1 hour) that should be sufficient. Any help appreciated! - Karl _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
