Ganglia and how it communicates

Posted by MikeKulls on Server Fault See other posts from Server Fault or by MikeKulls
Published on 2014-08-20T01:27:59Z Indexed on 2014/08/20 4:23 UTC
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I'm a little confused about how Ganglia sends information around and have found conflicting information on the web. I would have thought that the gmond process would either send info to gmetad at a regular interval or gmetad would request info from the various instances of gmond. At least one online article states this is how it works but from what I understand this is incorrect.

It appears that you configure all gmond processes to send their info to a central gmond process and gmetad will request info from that central gmond. Is that correct?

In my case I have 6 servers sending their information to 1 central server. If I set gmetad to get it's information from the central server then I get information from all 6 servers, all good.. Their weird thing is that if I point gmetad to one of the 6 servers then I still get info from all 6 servers. How is it that server 1 in my cluster if getting stats from all the other servers?

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