[rrd-users] Bug in dump/restore

[Benny Baumann]

Hi, when I enhanced the rrd_dump method a bit I did some changes to
rrd_dump to reduce the output of spaces. IDK if this has any effect, but
the versions affected by this aren't before 1.3.999*. Please recheck
with a version there, if you notice any differences and report back please.

In addition it would be nice if you could have a look if this affects
import (restore) or export (dump) of an RRD file, but given your initial
export had the correct values still present I suspect the error to be
within rrd_restore. Please try to verify this by querying the stored
values using a rrd_fetch or simular means.

Another detail which might be of interest: Which locales are you using
when running rrdtool?

Regards,
BenBE.

P.S.: A short "summary" like "precision lost with reimport" would have
been nice ;-)

Am 20.10.2009 12:11, schrieb Fabian Zimmermann:
> Hello,
>
> is there a known bug in dump/restore of rrdtool? I tried to find some 
> more information, but google didn't return anything useful.
>
> If I do a:
>
> rrdtool dump test.rrd > dump.xml
>
> i get:
>
> <!-- 2009-10-08 01:50:00 CEST / 1254959400 --> <row><v> 1.4980000000e+01 
> </v><v> 9.5716666667e+00 </v></row>
> <!-- 2009-10-08 01:55:00 CEST / 1254959700 --> <row><v> 3.8149000000e+02 
> </v><v> 7.0007666667e+02 </v></row>
> <!-- 2009-10-08 02:00:00 CEST / 1254960000 --> <row><v> 2.8804000000e+02 
> </v><v> 5.3001333333e+02 </v></row>
> <!-- 2009-10-08 02:05:00 CEST / 1254960300 --> <row><v> 2.8804000000e+02 
> </v><v> 5.3001333333e+02 </v></row>
>
> followed by:
>
> rrdtool restore dump.xml restored.rrd
> rrdtool dump restored.rrd
>
> and I got:
>
> <!-- 2009-10-08 01:50:00 CEST / 1254959400 --> <row><v> 1.0000000000e+00 
> </v><v> 9.0000000000e+00 </v></row>
> <!-- 2009-10-08 01:55:00 CEST / 1254959700 --> <row><v> 3.0000000000e+00 
> </v><v> 7.0000000000e+00 </v></row>
> <!-- 2009-10-08 02:00:00 CEST / 1254960000 --> <row><v> 2.0000000000e+00 
> </v><v> 5.0000000000e+00 </v></row>
> <!-- 2009-10-08 02:05:00 CEST / 1254960300 --> <row><v> 2.0000000000e+00 
> </v><v> 5.0000000000e+00 </v></row>
>
> I tested this with 1.3.1 (Lenny) and 1.3.8 (Squeeze). I also tried 
> "--no-header" and/or "--range-check", but still the same.
>
> Any ideas?
>
> Thanks a lot,
> Fabian
>
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