On Mon, Nov 30, 2009 at 17:08, John Martyniak <[email protected]> wrote: > Hi,
Hello. > I am very new to ganglia, I have ganglia installed and working for the > local machine. Welcome, and congratulations. > But when I try to have ganglia collect information on the running > cluster it does not get any results. > > So I guess I have a couple of specific questions: > 1) does each member of the cluster need to run gmetad or gnome? No. Typically, only the machine that will handle the RRD files needs to run gmetad. This is usually also the webserver, but it does not strictly have to be. > 2) I have machine 10.1.1.25 which is running ganglia web, gmond, and > gmetad, should that be the machine that each cluster machines sends > it's data to? On port 8649 or should it use port 8651? I'm not completely sure how Hadoop handles sending metrics around, so bear with me... The gmond processes communicate using UDP port 8649, for both sending and receiving metrics. It also listens on TCP port 8649 for polling requests from gmetad (or anything else that wants to read the XML dump for that daemon). Gmetad listens on port 8651 for incoming requests, usually from the web frontend. It also supports rudimentary interactive sessions on port 8652. Gmetad is responsible for polling one or more gmond processes using TCP port 8649, as mentioned above. There's a pretty picture of this interaction in figure two on the page http://www.linux-mag.com/id/6776 about halfway down. > 3) if #2 is corect then in the hadoop-metrics.properties, it should be > set to 10.1.1.25:8649 or 8651? Not sure about how hadoop works here... If this setting relates to *sending* metrics, you probably want use 8649. If this setting is to allow an external gmetad process to poll the hadoop box directly, then you want 8651. > 4) when creating the data source on the 10.1.1.25 machine, should the > associated machine be the 10.1.1.25:port or should it be all of the > individual machines in the cluster? Probably just the 10.1.1.25 box. If you have mutlple hadoop boxes, you will probably want them all to send metrics to 10.1.1.25. > > Also I am running hadoop 0.20.1 and ganglia 3.1.3 or 3.1.4 (don't have > the exact version in front of me. > > Thanks in advance for the help. > > -John > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Ganglia-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ganglia-general > -- Jesse Becker ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
