Hey Chris:
I would try to put them on different mcast ports just to try it out -
otherwise I can't really offer much.
I'm not entirely sure how you can have multiple data_source with the
same mcast port, because Ganglia got confused because of that?
Have you also tried to do the classic telnet <ip> 8649 to find out what
metric information is past? That usually helps with debugging ganglia
issues.
Cheers,
Bernard
Chris Jones wrote:
Bernard Li wrote:
I assume that you are using different mcast ports for the different
data sources.
No, I've got them all on the same port, but the partitions can't see
each other, so each of the data sources considers itself authoritative
(if you will) for the cluster. I can try putting them on different
ports, but it's not clear to me how that'll help.
Typically I find that if there are some errors with the metrics after
I have done some modifications to the cluster (add/remove nodes) - I
have to stop all the daemons (gmond/gmetad) and restart them. It
usually takes some time before the data gets properly propagated and
eventually the correct information shows up.
This has been fairly consistent for a few days (since I started using
Ganglia), and doesn't seem to be affected by restarting daemons.
