Oliver Wehrens wrote:
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On Jan 22, 2005, at 6:40 AM, Kevin A. Burton wrote:
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Do do what? To set a gmetric value or to get a snapshot of the DB?
Just open a Socket to 8649 on one of the ganglia nodes and it will
give you a data dump in XML and then parse that with Xerces.
I want to get a snapshot of the rrd of gmetad from java. So far what I
see is I have to query gmetad via the port, get the xml and store it
by myself to get data and graphs out of it (e.g. duplicating
everything using rjobin).
Yeah... we've done some custom jrobin code here. I'd like to dump it and
move to a java based gmetric compatible broadcaster which can read
/etc/gmond.conf. This way we could just write a daemon that sleeps for
an interval and then rebroadcasts the metrics.
Though one drawback to using ganglia for this is that (from what I can
tell) the stats are machine-based and not cluster based. Some stats I
want to log have no concept of individual machines and are in fact stats
for the overall performance of the cluster.
UDP from Java is pretty easy but I don't know the gmetric protocol so......
Ganglia does seem to go a long way but at least for my use case it only
accomplishes 70% ...
Kevin
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