Consider a scenario where you use 300 NetScaler VPX devices in the development and testing stages in your production environment. To manage and monitor such large number of devices, you can set up Command Center in a distributed multi-tier architecture by configuring Command Center agents to manage and monitor the Citrix devices.
This architecture reduces the load on the Command Center server by distributing the load across the different agents. In a distributed multi-tier setup, the Command Center server performs operations, such tasks as discovery, trap processing, monitoring entities and syslog messages, and configuration. The agents are used for monitoring entities and syslog messages, for certificate management, and for polling and collecting data used for performance monitoring, such as CPU usage, resource utilization, and IP bytes transmitted. The Command Center server and the agents are connected to the same database.
The number of agents to install depends on the usage of virtual servers, services and service groups to be monitored, reporting counters to be polled, and the syslog messages received by the Command Center server.
You can also monitor the state of the agents from your Command Center client. For example, when an agent connects to the Command Center server, an event of severity clear is generate and, if an agent connected to the server goes down, an event of severity critical is generated. This alerts the user to take appropriate action.
To install the Command Center agents, use the Command Center installation package available at the Citrix portal: http://mycitrix.com. The installation package is an executable file with the following naming convention:
Note: You cannot install the Command Center server and the agent on the same system. Also, you cannot install more than one agent on a system.