Cacti

What tables and fields does the cactid poller read for it's inputs? How and where does cactid poller store it's output? How does this output get inserted into the RRD database? I want to poll a large number of devices. I tried using RTG because of it's fast poller, but RTG does not support negative ...

I would like to monitoring around 1000 devices that are all the same. Is there a easy way to add these devices into cacti and setup associated graphs. I think I can add the hosts directly to the host table in the DB with a script, but I don't think creating the graphs is going to be that simply. Any...