[Ganglia-general] What are the rrdtool creation parameters for Ganglia Databases?

[Ian Wootten]

Hi all,

I want to replicate ganglia's storage in Java, using a multicast 
listener, storing and manipulating using rrd4j. Firstly has anyone done 
anything similar? I'm struggling knowing what parameters to set for the 
database and getting an adequate resolution of the metrics captured from 
multicast (10-30s for the application I desire). Does anyone know what 
the datasource and archive creation commands would be/how many there are?

Secondly, and I think this is the main thing, the capture of information 
seems to take ages to be recieved in this way. I'm aware of the MonaLISA 
project and their java interfaces into ganglia, but a similar 
implementation by myself seems extremely slow. Currently packets seem to 
be retrieved at a rate of 1 a second, with each packet containing a 
single metric value - I'd like to have a complete set after 10 or so 
seconds.Would I be better off sticking to my current method of 
interfacing with ganglia's rrd databases directly and extracting content 
via the fetch command?

Thanks,

Ian