Node Vs Virtual Node

by Apr 3, 2009

I'm a bit confused with the difference between a Node and Virtual Node. The documentation says a Virtual Node is basically a floating IP in a cluster. So that means it's a static IP, which may be a different machine at different times. How is this different from a Node, which is a static ip that just happens to be the same machine each time.

Why would I ever use a Virtual Node? Wouldn't using a Node do exactly the same thing? I tried adding both to up.time and couldn't tell any difference between the two – even the icon is the same!

I guess what I am asking for is an example where something could only be monitored with a Virtual Node because monitoring it with a Node would not work – and also *why* using a normal Node would not work.

Many thanks!