A detector is a process that monitors the state of a certain type of resource, such as mirrored disks. A detector is started by the base monitor when RMS is started.
Each detector uses an internal table to track information about one or more resources. The detector scans each resource listed in its internal table, obtains the current state of each resource, and then compares the current state to the previous state. If the current state is not the same as the previous state, the detector reports the current state to the base monitor through the detector report queue for that type of resource. Based on the information from the configuration file, the base monitor then determines, what, if any, action is necessary for the particular situation involving that resource.
The figure below illustrates the interactions between the base monitor and the RMS detectors.
Figure 4.3 Base monitor interactions
