[rrd-users] Re: followup on invalid data or spikes

[Steve Bishop]

I just did a bit more testing.  The "rrdtool tune" is not a necessary
to reproduce the bug.  In my experience, though, it *seems* that the
tune command seems to cause, or somehow bring about this problem.

-Steve



Steve Bishop wrote:

>
> rrdtool create my.rrd -b 946843500 -s 300 "DS:load:GAUGE:300:0:5000" "DS:out_oct:COUNTER:300:0:1250000" \
> "DS:drop_oct:COUNTER:300:0:U"   \
> "DS:out_pkts:COUNTER:300:0:25000" "DS:drop_pkts:COUNTER:300:0:U"  \
> "RRA:AVERAGE:0.5:1:864" "RRA:AVERAGE:0.5:3:1344" "RRA:AVERAGE:0.5:12:744" \
> "RRA:AVERAGE:0.5:288:91"
>
> foreach i ( `cat file1`)
>     rrdtool update my.rrd $i
> end
>
> rrdtool dump my.rrd > db.out
> rrdtool restore -r db.out my.rrd
> rrdtool tune my.rrd -a out_oct:1250000 -a out_pkts:25000
>
> foreach i ( `cat file2`)
>     rrdtool update my.rrd $i
> end
>
> Now, examine the rrd at this point, and you will find invalid data:
> rrdtool dump my.rrd > db.out
> rrdtool restore -r db.out db.xml
>
> out of range found [ds: 3], [value : 1.9991590274e+37]
>
>

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