[mrtg] Re: daemon robustness problem

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Sat May 4 14:41:45 MEST 2002

Tobias Oetiker wrote:

> > If that is the issue, then I suppose the real question is
> > how did the rra[0].cf get set to RRD? Or maybe rra[n].cf
> > doesn't have anything to do with the errors - I'm not very
> > familiar with the actual RRD data structure to begin with.
> it does ... but I have no idea how this could happen ... what is
> makeing RRD and "" appear in the place of AVERAGE ... these files
> can be fixed by dumping and then editing the text to AVERAGE

Let's do an inventory.  Who's having these problems and what
(version of) software are you running.


and, last but not least, what scripts are used for, for instance,
"spike removal".

Maybe we can spot a pattern.

I've loosly analised the output of rrdtool info on one of these faulty
.rrd files and it looks as if stat_head is overwritten with garbage.
Not only the CF was wrong, other parts were also wrong.  I can't remember
exactly what it was however one of the numbers was replaced by four ascii
characters.  That is just too unlikely to be coincidence.

I'd welcome a chance to look at a damaged .rrd file.  Please make one
available if you have

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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