- It's ok to always load the framework. If you don't
specifiy the CLUSTER_NODE environment variable it doesn't
ultimately do anything.
- The $CLUSTER_NODE variable causes the framework to try and
load a script named cluster-layout.bro which must be located
somewhere in your $BROPATH. The value of the $CLUSTER_NODE
variable is a count that indicates a node in the Cluster::nodes
variable that is set in the cluster-layout.bro script.
- The Cluster::nodes variable is a flat configuration because
it's assumed that it would be automatically generated by a
utility such as BroControl. This will facilitate the tiered or
"deep" clustering that is coming.
