Hi Vernon, Phil,

I'm actually using custom scripts, as I wanted a bit more flexible formatting in the report. There is however an easier way if you want to have a standard NCV report - use SPLITNCV instead of NCV. There was a brief question about this back in the summer, but the only source of info I've found really is the sourcecode.

In hobbitserver.cfg, instead of NCV_<testname> write SPLITNCV_<testname>. Everything else is as for NCV.

This will generate one RRD file for each colon-defined <datasource> line in the test file, named "<testname>,<datasource>.rrd" (and yes the first separator is a comma). Internally the RRD file datasource is named "lambda", as there is only one datasource per file.

Then in the hobbitgraph.cfg definition, use something like

FNPATTERN ^<testname>.(.+).rrd # yes the first separator is a full-stop/period TITLE and YAXIS as usual DEF:p at RRDIDX@=@RRDFN@:lambda:AVERAGE LINE2:p at RRDIDX@#@COLOR@:@RRDMETA@ GPRINT:p at RRDIDX@:LAST:@RRDMETA@ \: %5.1lf%s (cur)

etc

(I assume you know about the replaceable parameters in the definition language - it all looked very byzantine when I first came across it a few weeks ago, but I can explain it if necessary)

There is a problem though in that SPLITNCV is broken in the version I have (4.3 snapshot from August) - it tries defining two datasource lines both calls lambda in the same file. You will have to fix one line of code:

In hobbitd\rrd\do_ncv.c, 20 lines from the bottom there is a line if (split_ncv && (paridx > 1)) {

Change the 1 to 0. Recompile, copy hobbitd_rrd from <build>/hobbitd to <hobbit>/server/bin, and restart hobbit. It then works.

If you want to go the external script route, that snapshot was also broken, but I believe it is now fixed in the latest snapshot. The way I did it is in these two replies: http://www.hswn.dk/hobbiton/2008/10/msg00159.html http://www.hswn.dk/hobbiton/2008/10/msg00248.html

Graham Nayler

----- Original Message ----- From: "Everett, Vernon" <Vernon.Everett at woodside.com.au> To: <hobbit at hswn.dk> Sent: Thursday, October 30, 2008 1:34 PM Subject: RE: [hobbit] Graph definitions

Hi Phil

Have you, or anybody else on the list, got an example of such a script?

Thanks Vernon

-----Original Message----- From: Phil Wild [mailto:philwild at gmail.com] Sent: Thursday, 30 October 2008 4:43 PM To: hobbit at hswn.dk Subject: Re: [hobbit] Graph definitions

Hi Vernon,

You need to write your own backend data collector and have hobbit pass the data to it through a change in hobbitlaunch. You parse the data yourself at the server side and then build a single rrd file for every entry. You then use the FNPATTERN as you have already specified...

From memory, I think this is lightly covered in the man pages.

Cheers

Phil

2008/10/27 Everett, Vernon <Vernon.Everett at woodside.com.au>:

Hi all

Is there any way to define a graph definition for values that may or may not be available.

Let's work with CPU temperature, just as an example.

In hobbitserver.cfg, I can define this NCV_systemp="*:GAUGE" (And the other ncv definitions) It then generates rrd files for all the servers.

However, some systems have 1 cpu, some have 2, and some 4. So the rrd files only have entries for the number of CPUs.

In the hobbitgraph.cfg we can define the graph, with 4 cpu temperatures, but if the rrd file doesn't contain 4 fields (i.e. system has only 2 CPUs), it doesn't generate a graph. It is also not possible to have a separate graph definition for 1, 2 and 4 CPU systems.

The other way round it, is to have each CPU in a separate file, and define FNPATTERN= with a wildcard. But how do we get the ncv module to put each field in a sepreate rrd file?

Regards Vernon

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