> > Does anybody have experience with such setup? Basically, > the number of > > hosts would be pretty small, but the number of metrics > could be large > > (100s or > > 1000s) and for some of them we'll need very fast updates. > > While it would be nice to have per-process or per-application > metrics, I believe it was recently stated in an e-mail just > sent in the last 24 hours about a similar task that it's not > currently available in Ganglia, although it might be a nice > feature to put into the libmetrics codes.
We're planning to add all the application-specific metrics through gmetric. So the J2EE app would call gmetric every time it wants to update. For example, I would create a metric 'EJB_componentX_errorrate' for each componentX and report the value from J2EE. So it certainly is possible, but I'm just worried (for example) that some data might get lost because of such frequent updates or something. The user-defined metrics are less-efficient, right? So having 1000s (from each host) could cause some problems ... I'd like to know what kind of problems we can expect and what do to about them. Peter
