## Monitoring Strategy

The monitoring is performed by the master and slave agents installed on a set of servers. These servers are selected for the following reasons:

- The server has access to storage devices in-band (for example, the Sun StorEdge A5x00 array).
- The server has access to logfiles such as `/var/adm/messages` or storage device log files such as `/var/adm/messages.t3`.
- The server has out-of-band access to storage devices that can be monitored out-of-band, such as Sun StorEdge storage arrays and Sun Switches.
- Multiple servers are used to distribute the monitoring load. For example, not all Sun StorEdge storage arrays need to be monitored from the same agent. In many instances, Sun StorEdge storage arrays will be installed in groups and will replicate their logfiles (`messages.6120`) to more than one server. In this case, it is best to install a slave agent on each server to have access to the logfile and the corresponding arrays from the same agent.