Tobias Oetiker <[email protected]> writes: > Hi Mark, > > Today Mark Plaksin wrote: > >> Hi: >> >> I'd like to be able to detect anomalies via the command-line. I have >> begun to explore Holt-Winters, PREDICT, etc. They can all display >> anomalies in a graph. But I think Holt-Winters is the only one that >> will let me get at the data on the command-line via rrdfetch. Is that >> true? >> >> Maybe this question is essentially the same as my previous question >> about getting graph data without the graph [1] :) In that thread Dan >> Cech mentions using rrdgraph in "report" mode. But IIUC you can't >> report a series of numbers, just a single number. That is, you can't >> print the result of a DEF or a CDEF. >> >> Am I missing anything? Are there any plans to make it easier to get at >> raw data? I think the prediction and anomaly-detection features would >> get used more if they could be scripted. As is, I can't possibly look >> all of the graphs once a day (or week or month :) to find anomalies. >> >> And, of course, thanks for rrdtool--it's awesome! > > the trick is to use rrdtool updatev then you will see what data > gets added to the HW RRAs as it happens ...
Cool! Thanks! I'll try it out. It looks like PREDICT would do a good enough job of spotting anomalies and it doesn't require that we rework every RRD file. So I was hoping for a way to get at PREDICTions via the command-line. I realize that using PREDICT would require that we "draw a graph" for every data point once every day (or however often we wanted to detect anomalies). But it still might be cheaper than HW. Are all of the (many! :) existing anomaly-detectors using Holt-Winters? Or maybe using their eyeballs? _______________________________________________ rrd-developers mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers
