tinsfci wrote: >Let´s say I plot a graph from "now" to -1month, does RRDtool "automatically" >use "no 3", or do i specify it somewhere? > >"no 1": 600 samples of 5 minutes (2 days and 2 hours) >"no 2": 700 samples of 30 minutes (2 days and 2 hours, plus 12.5 days) >"no 3": 775 samples of 2 hours (above + 50 days) >"no 4": 797 samples of 1 day (above + 732 days, rounded up to 797)
Best to be more accurate in your start and end times. For starters, don't end "now", end "now - (now % interval)" where interval is the period for the consolidation you want to use. Taking your example, you would only ever use 00:00, 02:00, 04:00, and so on for your monthly graph. For start time, again be precise. I will select "end time - (interval * number of pixels)" so that the start time is exactly on a period boundary and each sample fits to one pixel in the graph. For the consolidations you've used there it won't happen, but there are some combinations that can cause you to get low resolution data. rrd tool will use whichever consolidation provides the most data to fill your graph - so if you manage to have odd periods you may find your one day graph drawn with data consolidated at one day ! As a simple example, suppose you have consolidations at 10 minute and 25 minute resolutions. For some values of "now", there will be a more recent value in the 25 minute consolidation than the 10 minute one. Eg, if they happen to coincide at midnight, then between 00:25 and 00:30 this would be the case. -- 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
