Thank you, Tobi. But I do not use expressions anywhere in real tasks. I placed expressions in code samples to make the text readable. In my real experiments, only numbers (values of these expressions) are used.
Mahris Tobias Oetiker wrote 2011.04.03. 14:04: > Hi Maris, > > Today Maris Janis Vasilevskis wrote: > >> In following excerpts, I use dates and expressions for readability. >> In reality, I use only numbers - seconds for step, seconds from epoch for >> start and end. >> >> rrdtool create test.rrd --step 1 --start -2year DS:cpu:GAUGE:600:0:100 >> RRA:AVERAGE:0.5:24*3600:720 >> There are also RRAs for week, hour and minute. >> To be safe about last year data, I filled database with test values for 2 >> years (update with step 10 secs). >> >> rrtool graph --end now --start end-14month >> DEF:avr4=test.rrd:cpu:AVERAGE:step=30*24*3600:start=1Apr2010:end=1May2010 >> LINE:avr4#FF0000 >> DEF:avr5=test.rrd:cpu:AVERAGE:step=31*24*3600:start=1May2010:end=1Jun2010 >> LINE:avr5#FF0000 >> ... >> >> I get results for some months only, most part of graph is empty. > > cool idea ... but you can not have math expression in the step > argument, so you must calculte them externally. > > cheers > tobi _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
