[rrd-users] does rrd aberrant behaviuor detection really work ?

Patrick Felt pfelt at feltonline.com
Wed Oct 3 04:41:18 CEST 2007

  I'd love them!  I've been toying with the idea of whipping up a 
similar thing to extend cacti to use the holt-winters stuff, but haven't 
had time.


sylvain at meduse.homelinux.net wrote:
> Hello ,
> thanks a lot for your answers !
> I can confirm 2 things :
> * the discussed bug is fixed in the latest 1.3-beta1 released (and also in
> the latest svn snapshot).
> * what i'm doing i a mass update in one time (about 2 weeks of update,
> with a 300 seconds step, by using "./script.pl | rrdtool -").
> Some people (me, and others, i hope...) want their old rrd without abd
> transformed in rrd with abd, without losing history.
> I've written a quick perl script that parse the output of a "rrdtool info
> foo.rrd" and produce a bar.rrd with the same structure + abd structure,
> but with no data.
> I've written a very dirty other perl script that parse the output of
> "rrdtool dump foo.rrd" and fill in bar.rrd with the data (for now, in only
> takes care of RRA having a pdp_per_row=1).
> I still have a little bug when datas contain NaN, but it will be hopefully
> solved tomorow, or at least this week.
> I use rrdtool at work (cacti + some homemade scripts), and i have some
> constraints : what i do shouldn't be 'intrusive'.
> More precisely, rrd perl package is not installed, and i should not
> install it (don't try to understand, i have renounced my self :-/ ). Thas
> whyl i'm parsing xml, instead of using perl bindaries.
> I can't install some libs (pango, cairo, ...), so i produced at home a
> static binary of rrdtool. That's not that easy, since the
> --enable-static-programs dont realy work for now, and compiling some parts
> by hand (without the makefile and libtool) is required.
> If you (or someone else ?) think my quick and dirty perl scripts could
> help, tell me, and i'll translate my french comments inside.
> (sorry for my poor english)
> regards,
> sylvain
>> in the 1.3er dev cycle quite a lot happened to rrd_update ... first
>> the whole write logic was redone for better performance and mmap
>> ability ...
>> then evan refactored the whole update code and fixed the bug he
>> mentioned ...
>> so in the whole process it could well be that other things were
>> fixed ...
>> there was for example a bug in ABD triggered when running rrdtool
>> update with multiple updates in a single call on linux (it worked
>> fine on solaris) which was gone after the dma update to rrd_update.
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