Thanks Simon, that's a very compelling explanation on how to handle this situation. Probably it worth putting in the RRDTools' wiki to prevent others coming regularly and asking the same question.
Regards P.S. Just one final question are these RPNs available when fetching and exporting data? I don't want to actually graph data, but to export it to other applications. Documentation is not clear. On 10/30/2012 08:51 AM, Simon Hobson wrote: > You can compute totals in RRD - the problem is that the way it does > it isn't the way you want to do it *in this application*. Which ever > way it's done, there will be a lot of people for whom that is not the > right way. Even in one setup the requirements may change > > So there you are - which way should RRD do it ? Either way is both > right and wrong. As it is, it's possible to work around it either way > if you use the right calculations when extracting the data. > > If you want to assume zero, then this RPN will do the conversion for > you, then work with the result : > aa=a,UNKN,0,a,IF > which means: if a is unknown then substitute 0, else use a. > -- Pablo Chacin R&D Engineer SenseFields SL Tlf (+34) 93 418 05 85 Baixada de Gomis 1, 08023 Barcelona (Spain) http://www.sensefields.com/ _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
