[Ganglia-general] How do I plug in data without calling gmetric on the host?

[Egan Ford]

I have a large cluster and I would like to collect HW data, but do not want
to call gmetric on each node, e.g. today each node has to run:

gmetric --name temp --value 30 --type int16 --units Celsius

Since I can get the data without impacting the OS, how can I get the data
into gmetad?  Something like:

gmetric --name temp --value 30 --type int16 --units Celsius --host node1

Thanks.