Glossary (Solstice SyMON User's Guide)

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Solstice SyMON User's Guide

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action: Tells Solstice SyMON what to do when a rule is active. Actions can be used to notify users of a situation that may require attention. An action might be to create an event, to send a record of the event to the Event Log to generate an email message about the event, to use a modem to dial a beeper, or to execute a program. You may define new actions as needed.
agent: The program or daemon that collects data from the server and provides it to the rest of Solstice SyMON.
alarm: A predefined procedure for event rules that makes an event active, creates a log entry in the Event Log for the event, optionally posts a message to the Event Viewer, and highlights the affected node in the appropriate console.
attributes: Elements of an event rule, including the number of the rule, condition, actions, level, priority, and severity.
client: In the client-server model, the client is a machine that remotely accesses resources of a server. The server provides a service such as greater compute power or access to a large database, or larger memory capacity.

complex rule: An event rule in which a single rule can generate multiple events and log entries by searching a range of parameters. Complex rules make the Event Handler evaluate the condition for multiple components or systems. For example, complex rules can be used to make the Event Handler check the condition for each board on a system. The MULTI parameter must be used to designate a complex rule.
condition: A Tcl string that defines when a rule is active. This is the only mandatory part of a rule. A condition does not have a tag. Examples include a failed board or a DNLC long name ratio greater than 25 percent.
end_alarm: A predefined procedure for event rules that closes the log entry in the Event Log for the event, deletes the event from the Event Viewer, and removes any console.
event: An action that is used to notify other applications of a condition, typically hardware or operating system conditions, that may require the attention of the system administrator.
Event Handler: A subsystem of Solstice SyMON that reports events based on a set of supplied rules. The Event Handler collects data from monitoring agents and evaluates them for conditions defined within its rules. When a condition is true, an event occurs and the Event Handler implements any specified action(s) in the rule. When the condition that generated the event no longer exists, the Event Handler may run a special action such as closing the event.
event log: A log in which the event generator records events. It is an ASCII file with fixed length records.
Event Viewer: A console within the Solstice SyMON GUI that displays the Event Log.
EVENTS variable: A list of event rules specified in the file, /etc/opt/SUNWsymon/rules.tcl.

graphical user interface (GUI): The Solstice SyMON user interface is a CDE/Motif-based application that receives and displays data from all of the agents of Solstice SyMON.
Kernel Data Catalog: Displays a hierarchical schematic view of the performance parameters that Solstice SyMON monitors.
Launcher: The main window of Solstice SyMON. Each button on the console launches one of the seven Solstice SyMON consoles: Event Viewer, Log Viewer, Physical View, Logical View, Kernel Data Catalog, Process Viewer, and the On-Line Diagnostics Screen. It also reports on and controls overall system functions (for example, its agents.)
Log Viewer: Displays entries that appear in the system log file.
Logical View: Displays a hierarchical schematic view of system components.
MULTI: A special event rule attribute used to permit the rule to check a list of node variables for multiple events off a single rule. For example, the MULTI string can be used to make the Event Handler check a condition of a rule for each board in the system.
ON_OPEN: An event rule attribute that tells Solstice SyMON what to do when the condition for a rule becomes true.
ON_CLOSE: An event rule attribute that is interpreted when a rule is no longer true.
ON_CONTINUE: An event rule attribute that is interpreted when a rule continues to be true two or more times in a row.
ON_SHUTDOWN: An event rule attribute that is interpreted when the system shuts down.
Physical View: Displays pictorial images of the server. The images are updated dynamically as displayed components change state.

PRIORITY: A rule attribute. A priority for the rule for the user to interpret that is used in conjunction with SEVERITY.
procedures file: Defines procedures used by Solstice SyMON rules. The file must exist, but can be empty. The file is located in /etc/opt/SUNWsymon/event_gen.tcl).
Process Viewer: Displays information on processes running on the server. Information includes time the process was started and by whom, the total CPU that the process has used, and its current status.
RULE: Event rule attribute that indicates the rule number.
rule: A condition and a set of actions associated with that condition. Rules are always in the EVENTS Tcl variable, which is located in the file, /etc/opt/SUNWsymon/rules.tcl.
rules functions: A rules function is a predefined procedure such as ON_OPEN or ON_CLOSE; it is used within an event rule, such as alarm and end_alarm.
server: In the client-server model, the server is a machine with compute resources or large data storage capacity. Client machines can remotely access and use these resources.
SEVERITY: An event rule attribute that indicates the severity of the rule for the user to interpret. Used in conjunction with PRIORITY.
simple rule: An event rule that has a one-to-one correspondence between the rule and an event. A simple rule does not check a wildcard list of variables. As a consequence, it can only generate a single event.
System Meter: A GUI window within the Kernel Data Catalog that displays graphs of monitored performance parameters.

tag: A tag is a textual string associated with a user-defined item.
LABEL_DATA: Format for attributes in Solstice SyMON rules. A tag is a textual string associated with a value. Valid tags are RULE, ON-OPEN, ON-CLOSE, ON-CONTINUE, ON-SHUTDOWN, PARAMETERS, MULTI, SEVERITY, and PRIORITY.
Tcl: A scripting language used to define Solstice SyMON rules.