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List:       ganglia-general
Subject:    Re: [Ganglia-general] RRAs explanation + RRDCACHE
From:       Vladimir Vuksan <vlists () veus ! hr>
Date:       2013-09-05 14:41:51
Message-ID: alpine.DEB.2.02.1309051039430.1928 () vukovar
[Download RAW message or body]

I wrote a blog post that provides an answer on what RRA settings mean

http://blog.vuksan.com/2010/12/14/misconceptions-about-rrd-storage/

Regarding rrdcached working or not it would be obvious if it wasn't 
running. Logging is poor however if it wasn't running properly you would 
get no graphs. There are couple other failure scenarios but I can't think 
of them right now.

Vladimir

On Thu, 5 Sep 2013, Derek Smith wrote:

> 
> I still would like to understand the answers to these questions?  Thank you!
> 
> 
> 
> From: Derek Smith
> Sent: Tuesday, August 27, 2013 04:16 PM
> To: ganglia-general@lists.sourceforge.net
> Subject: RRAs explanation + RRDCACHE
> 
> 
> 
> Hi All!
> 
> 
> 
> I read http://oss.oetiker.ch/rrdtool/tut/rrd-beginners.en.html and the advanced \
> link but I am still a little confused. 
> 
> 
> My current setting in gmetd.conf is: RRAs "RRA:AVERAGE:0.5:1:11520" \
> "RRA:AVERAGE:0.5:4:43200" "RRA:AVERAGE:0.5:40:52560" 
> What does this say or mean?
> 
> Also, I edited the gmetad startup script  to include \
> RRDCACHED_ADDRESS=/var/lib/ganglia/rrdcached/rrdcached.socket 
> Then restarted gmetad with debug equal to 5 and I did not see any data that \
> confirmed gmetad was using this.  How can I confirm gmetad is using rrdcache?
> 
> My conf.php does have $conf['rrdcached_socket'] = \
> "/var/lib/ganglia/rrdcached/rrdcached.socket"; 
> 
> 
> Here is my process list:
> 
> 
> 
> ps -ef |grep gan
> 
> nobody  5701640        1  10   Aug 15      - 1171:33 /opt/freeware/sbin/gmond -p \
> /var/run/gmond.pid -c /etc/ganglia/gmond.conf 
> nobody  6422544        1 213 15:07:26      - 21:03 /opt/freeware/sbin/gmetad -p \
> /var/run/gmetad.pid -c /etc/ganglia/gmetad.conf 
> root  7012366        1   0   Aug 15      -  0:22 /opt/freeware/bin/rrdcached -p \
>                 /var/run/rrdcached/rrdcached.pid -l
> /var/lib/ganglia/rrdcached/rrdcached.socket -w 300 -t 8 -P FLUSH,PENDING -b \
> /var/lib/ganglia/rrds -B 
> 
> 
> thank you!
> 
> 
> 



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