Hi all: On Fri, Sep 12, 2008 at 10:00 AM, Ofer Inbar <[EMAIL PROTECTED]> wrote:
> I added a host to an existing cluster, and noticed the total number of > CPU cores for the cluster fluctuate, so I tried restarting all the > gmond's in the cluster... but that just made most of the CPU's appear > to disappear from Ganglia metrics altogether. > > I narrowed it down to this: > each gmond only reports cpu_num for nodes that restarted after it. > > If I restart gmond on node1, it reports cpu_num for itself only, even > though other gmonds in the cluster are reporting cpu_num for other > nodes. If I restart gmond on node2, node1 will now report cpu_num for > itself and for node2 ... but node2 has now "forgotten" cpu_num for all > other nodes except itself. And so on. > > It's a catch-22. I can't make them all see every node's metrics. > > Ganglia 3.1.0 on CentOS, using multicast only. Since I have a 3.0.7 installation handy, Cos suggested I do an experiment: 1) WIth Ganglia 3.1.1, I restart a gmond that is not listed in the data_source and I nc the host checking for the number of cpu_num lines in the XML stream. This number stays 1 until quite a while (maybe 10 mins). 2) With Ganglia 3.0.7, I did the same test as above, and immediately after restarting gmond the number of cpu_num lines was already at 3, and quite quickly grows in a matter of minutes When I first tried 3.1.x, I always thought it odd that when I restart a gmond, I had to restart *all* the rest of the gmonds to get the right number of total cpus, I guess this confirms my suspicion. If this is indeed a bug/unwanted new behaviour, please discuss this in ganglia-developers. Thanks, Bernard ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Ganglia-developers mailing list Ganglia-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-developers
