Thanks for the quick replay, S Shipway, but I don't think not having the other prediction RRA is the reason for my problem. First, when you create HWPREDICT RRA without /rra-num/ parameter (and this is the case here), the other RRAs will "implicitly be created with default parameter values". Besides I tried to create a lot of other RRDs, with different combinations of RRAs, for example I tried this one (again an example from the documentation):
rrdtool create monitor.rrd --step 300 \ DS:ifOutOctets:COUNTER:1800:0:4294967295 \ RRA:AVERAGE:0.5:1:2016 \ RRA:HWPREDICT:1440:0.1:0.0035:288:3 \ RRA:SEASONAL:288:0.1:2 \ RRA:DEVPREDICT:1440:5 \ RRA:DEVSEASONAL:288:0.1:2 \ RRA:FAILURES:288:7:9:5 I had the same problem each time I tried to create HWPREDICT (or RRA:MHWPREDICT for that matter). I gave this example, because it is directly taken from the examples in the documentation and I really can't figure out why is it not working. About the RRDTool version: sorry that I did not mentioned it. I'm using 1.4.7, which I believe is the last stable release. -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/Invalid-alpha-parameter-for-forecasting-tp7581632p7581637.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
