[rrd-users] Bug in rrdtool?

[Reinhard Scheck]

If this turns out to be 64bit specific, I'm interested in trying to reproduce 
this on a F12 64bit system.
Would you please be so kind to post the plain rrdtool graph command that fails?

Reinhard

On 01.01.2010 07:14, Jean-Yves Avenard wrote:
> Hi
>
> 2010/1/1 Benny Baumann<BenBE at geshi.org>:
>> Which version of RRDTool on what platform using which OS were you using?
>
> I tried RRDtool 1.4.2 and 1.3.9.
> That was on a Ubuntu 9.10 / 64 bits Linux (2.6.31)
>
>
>> ow was the interfacing with RRDTool (I'd guess Command Line client from
>> the source below)?
>> Is the error reproduceable? If so, to what extend? Could you provide the
>> offending RRD Database or does it happen with every file of a given format?
>
> Yes, I can reproduce it every time ...
> http://www.avenard.org/files/solarprod4.rrd.bz2
>
> It was created with:
> rrdtool create solarprod.rrd -s 60 \
> DS:power:GAUGE:300:0:U \
> DS:total:DERIVE:300:0:U \
> RRA:AVERAGE:0.5:1:144000 \
> RRA:AVERAGE:0.5:5:525600 \
> RRA:AVERAGE:0.5:30:87840 \
> RRA:AVERAGE:0.5:60:43920 \
> RRA:AVERAGE:0.5:120:21960 \
> RRA:AVERAGE:0.5:1440:1830 \
> RRA:MIN:0.5:60:43920 \
> RRA:MAX:0.5:60:43920
>
>
>> Could you check with a debugger to get some more specific information
>> about the issue?
>
> I've now completely changed the way I was doing it ; because I
> couldn't bypass that problem otherwise.
>
> So what I now do instead of getting rrdtool to graph ; is calling in
> my php script rrdtool fetch on all the period I'm interested ; then I
> do the calculation myself and add the string in the graph.
>
>>>
>> hmmm, usuaklly notihing to worry about ...
>
> I would have thought so :)
>
>> Hmmm, maybe you might want to try the direct PHP bindings for PHP for
>> faster interfacing with RRDTool without needing process execution for
>> PHP to be enabled (improving security).
>
> I had trouble compiling the PHP module on FreeBSD ; so I found it
> easier and more portable to exec on the rrdtool binary.
>
>> Could you provide the full command line that is being executed when the
>> problem appears?
>
> I don't have it anymore ... The PHP code there generate the command line.
>
>
>> Please try
>>
>> "CDEF:cext=cext0,cext1,cext2,+,+"
>
> I had tried that already ; it made no difference.
>
> I also tried splitting the calculation in two CDEFs then add those
> CDEF together ; I got the same error.
>
>> Plese provide a small testcase script+rrd file that gives this error.
>> Instead of the rrdfile you could also provide a create statement for
>> such a file.
>
> I'll try again a bit later ; I'm more interest in fixing the '??'
> error in the graph right now (see other thread) , because for that one
> I have no work around...
>
> Jean-Yves
>
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