[hobbit] Custom graphs again

[Charles Goyard]

Stewart wrote :
> So, I have a bit of a situation.
> 
> in that vein, it would be nice if I can get the data stored in a 
> separate RRD file for each interface (the same way that there is a 
> separate RRD file for each partition on a disk test) so that I can use 
> the file @RRDFN@ and @RRDPARAM@ stuff to work, but I'm unsure how to do 
> that.
> 
> little help?

Hi,

I posted a patch some time ago that Henrik ignored, but it permits one
to do that very thing.

I provide it again in case Henrik notices this time :)


------------ (Date: Thu, 28 Dec 2006 19:07:07 +0100 ) ----
Hi all,

here is a patch that provides two new features to the NCV graph backend.
It answers to a request I did on August 2nd (subject: "Dynamic or Split
NCV").

- split-ncv : Lets you store an ever-changing set of data on a status
  column basis. Say, you want to keep track of who is accessing a
  database. It works by creating a rrd file per ncv line instead of
  packing a lot of DS in a single rrd file. I use it to keep track of
  tomcat session number per context, harddrive temperature, database
  connexions, and a whole bunch of other things, such a the repartition
of
  loaded classes on a jvm (useful to find memory leaks).

- trackmax : it lets you keep track of the maximum value of a dataset,
  along with the average. It's useful when the maximum is somehow as
  significant than the average over time. (say, to track a hard-limited
  ressource, such as telephone lines). I use it to keep track of the
  maximum number of busy X25 lines on a specific application. It only
  works for NCV at the time, but I may add it to other tests.

The patch includes the documentation for all this. It applies on today's
snapshot and on october' all-in-one. It does not work with the plain
release because of a nasty bug in do_ncv.c.

Well, here's the patch. Consider it beta, but yet it works on my
production server. I strongly hope it will be included in the
mainstream hobbit (I don't like maintaining local patches :)).




-- 
Charles Goyard - charles.goyard at orange-ftgroup.com - (+33) 1 45 38 01 31
online multimedia / ingénierie
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