Hi Aaron,
What is the output of "rrdtool
info cron.webServiceRequestCounter.Counter.rrd"?
--Nick.
On Tue, Oct 23, 2012 at 9:44 PM, Aaron Nichols <[email protected]> wrote:
> Bumping this thread - I updated to rrdtool 1.4.7 & rebuilt ganglia against
> the new version of rrdtool and it didn't appear to change the behavior.
>
> Any suggestions for what this problem might be would be much appreciated.
>
> Thanks,
> Aaron
>
>
> On Mon, Oct 22, 2012 at 8:47 PM, Aaron Nichols <[email protected]>wrote:
>
>> Re-posting this on ganglia-general as I didn't get any hits on
>> -developers:
>>
>> All,
>> I'm trying to apply Holt-Winters to a few of our rrd's and have run
>> into a problem which seems specific to the __SummaryInfo__ rrds. When I
>> apply the Holt-Winters algorithm to both the host rrds as well as the
>> __SummaryInfo__ rrds, the host rrds work fine however the __SummaryInfo__
>> do not. This note will focus on the __SummaryInfo__ rrds.
>>
>> These metrics are stored in an rrd of type COUNTER. I have also observed
>> this behavior on the same metric set to type DERIVE.
>>
>> I am using the rrd_hwreapply.pl script (
>> http://rrfw.sourceforge.net/rrdman/rrd_hwreapply.pod.html) to apply
>> holt-winters to the rrds and for simplicity right now I'm only using the
>> following command line:
>>
>> $ sudo -u nobody cp cron.webServiceRequestCounter.Counter.rrd
>> cron.webServiceRequestCounter.Counter.rrd.bak && sudo -u nobody
>> rrd_hwreapply cron.webServiceRequestCounter.Counter.rrd.bak
>> cron.webServiceRequestCounter.Counter.rrd --defaults --force
>>
>> As soon as I run this command, the primary metric
>> (cron.webServiceRequestCounter.Counter) will stop rendering new values on
>> the graph. It appears, however, that updates are still being stored in the
>> rrd except in a different column in each row - I couldn't find much info
>> about what the two different columns in the rrdtool dump output are for.
>>
>> I have placed images, rrdtool dump output & version info into a github
>> repository here - just view the readme
>>
>> https://github.com/adnichols/ganglia-hw-graph-problem
>>
>> I dug through the rrdtool changes in 1.4.6 & 1.4.7 and didn't see
>> anything that looked like this problem, however if someone can point me to
>> something that suggests rrdtool is the issue I can update. It's just a fair
>> amount of work that I'd like to avoid if it's not the issue.
>>
>> Thanks,
>> Aaron
>> --
>> Twitter: @anichols
>> Blog: http://www.opsbs.com
>> Pro: http://www.linkedin.com/in/anichols
>>
>>
>
>
> --
> Twitter: @anichols
> Blog: http://www.opsbs.com
> Pro: http://www.linkedin.com/in/anichols
>
>
>
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