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Resource Monitoring and Control Guide and Reference


Glossary

action
The part of the Event Response resource that contains a command and other information concerning the command.

Condition
A state of a resource as defined by the Event Response resource manager that is of interest to a client. It is defined by means of a logical expression called an event expression. Conditions apply to resource classes unless a specific resource is designated.

event
Occurs when the event expression of a condition evaluates to true. An evaluation occurs each time an instance of a dynamic attribute is observed.

event expression
A definition of the specific state when an event is true.

Event Response
One or more actions as defined by the Event Response resource manager that take place in response to an event or a rearm event.

FFDC
First Failure Data Capture provides a way to track problems back to their origination even though the source problem may have occurred in other layers or subsystems than the layer or subsystem with which the end user is interacting. FFDC provides a correlator called an ffdc_id for any error that it writes to the AIX error log. This correlator can be used to link related events together to form a chain.

rearm event
Occurs when the rearm expression for a condition evaluates to true.

rearm expression
An expression that generates an event which alternates with an original event in the following way: the event expression is used until it is true; then, the rearm expression is used until it is true; then, the event expression is used. The rearm expression is commonly the inverse of the event expression. It can also be used with the event expression to define an upper and lower boundary for a condition of interest.

resource
An entity in the system that provides a set of services. Examples of hardware entities are processors, disk drives, memory, and adapters. Examples of software entities are database applications, processes, and file systems. Each resource in the system has one or more attributes that define the state of the resource. (Note that in Web-based System Manager, attributes are referred to as properties.)

resource class
Broad category of system resource; for example, node, file system, adapter. Each resource class has a container that holds the functions, information, dynamic attributes, and conditions that apply to that resource class. For instance, the /tmp space used condition applies to a File System resource class.

resource manager
A process that maps resource and resource-class abstractions into calls and commands for one or more specific types of resources. A resource manager can be a standalone daemon, or it can be integrated into an application or subsystem directly.

SD
Structured Data


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