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Network (over)load should be taken into consideration as regards which model to use (push vs pull), you don't want to destabilize the network. push is more scalable overall and preferred for fault management.
Agent configuration <Feb 14 2017>
Should be able to dynamically:
* Enable/disable/or restart resource monitoring
* Get values/notifications
* Get capabilities
* Get the list of metrics being collected
* flush the list of metrics
* Set thresholds for resources
* blacklist resources
* support some sort of buffering mechanism, and should be able to configure
* get the timing information for the agent and do aTiming sync if required.