Hi Alex, What would be a good forum to ask questions about HW ? The last couple of my questions on the topic to this list went un-answered.
I am having trouble tuning the alpha,beta and gamma parameters so that I can make the counters learn the pattern correctly. But I could not find much documentation on this. The original paper from Jake Brutlag gives some thumb rules, but from the equations given there, it is not easy to see the change in behavior with the change in the parameters. The rrdtune page does not specify much either (for example what would be the effects of values as they move between 0 and 1 for gamma and gamma deviation). Thanks, Praveen. --- Alex van den Bogaerdt <[EMAIL PROTECTED]> wrote: > On Sun, Sep 10, 2006 at 12:27:41AM +1000, Darryl > Lewis wrote: > > > I have about 100 rrd's that I'd like to modify and > add Holt-Winters forecasting to. > > Being that I have a 12 months worth of data in > each of them, I'm reluctant to blow them away and > start again. > > I'd like to modify the existing databases to > include > > > > RRA:HWPREDICT:rows:alpha:beta:seasonal > period[:rra-num] > > RRA:SEASONAL:seasonal period:gamma:rra-num > > RRA:DEVSEASONAL:seasonal period:gamma:rra-num > > RRA:DEVPREDICT:rows:rra-num > > RRA:FAILURES:rows:threshold:window length:rra-num > > > > Does anyone have a script or procedure / set of > instructions to add these to existing rrd's? > > No experience with HW, but transfering available > data to a new database > should be standard. > > 1: > Create the new database, make sure to set "--start" > slightly earlier than > the oldest data you're going to insert. > > 2: > Tune the new RRD so that it accepts gauge data (no > matter the real DS types). > Also set the heartbeat to a high number, at least as > high as the largest > step*steps in your RRAs. > > 3: > Use rrdtool fetch to get data out of the original > RRD. Feed this data into > the new RRD > > 4: > Tune the RRD back to its original settings. > > > Step 3 may involve a couple of substeps, depending > on the resolution of > your RRAs. Make sure you understand data > consolidation and you'll know > what to do. > > HTH > -- > Alex van den Bogaerdt > http://www.vandenbogaerdt.nl/rrdtool/ > > -- > Unsubscribe > mailto:[EMAIL PROTECTED] > Help > mailto:[EMAIL PROTECTED] > Archive http://lists.ee.ethz.ch/rrd-users > WebAdmin http://lists.ee.ethz.ch/lsg2.cgi > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
