This model describes monitoring by an agent for Agentless Monitoring used when a server does not have an Agent installed.
The Manager/Proxy Manager remotely collects performance information from servers that do not have Agents installed. The information that is collected is then managed collectively on the Manager.
The Manager can collectively manage both servers with Agents installed and servers without Agents installed.
One Manager can manage about 50 servers. The exact number, however, depends on the Manager's disk performance and memory usage.
If a server already has an Agent installed on it, then you cannot monitor performance from the monitoring server (Manager) that an Agent is connected to using an agent for Agentless Monitoring. Attempts to perform such a connection may result in inconsistencies in the data collected.
Point
When collecting information from physical servers that act as virtual resources (with VMware, Hyper-V, and Red Hat virtualized functions (Xen)), count the number of physical servers rather than the number of virtual servers.
When collecting information from virtual servers, count the number of virtual servers to be monitored.
