Glossary
- 3-tier architecture
- The Sun Management Center server stands between the Sun Management Center console on one end and the Sun Management Center agents on the other.
- Sun Management Center agents provide the data required for manageability.
- Sun Management Center console components provide the system monitoring, control, and configuration user interfaces.
- The Sun Management Center server acts as a request broker between the agent and the console.
- ACE
- Authentication, Compression, Encryption. The ACE layer provides authentication, compression, and encryption functions for communication across the interface.
- ACLs
- Access Control Lists. The Sun Management Center agent MIB supports the specification of multiple levels of SNMP read or write access controls. These access control (ACL) specifications define the minimum security level required of users and/or groups to perform SNMP read or write operations on objects in the MIB.
- active nodes
- An active node is a managed object or managed property that has refresh information associated with.
- agent
- A software process, usually specific to a particular local managed host, that carries out manager requests and makes local system and application information available to remote users.
- agent MIB
- The MIB that corresponds to a specific agent.
- alarm
- An abnormal event, which may be indicative of current or impending problems, is detected by a Sun Management Center agent. The agent passes information about the abnormal event to the Sun Management Center server. The server passes this information on to the user as an alarm when the abnormal event matches a predefined alarm threshold.
- alarm acknowledgment
- Sun Management Center users can acknowledge alarms indicating that the alarm does not represent a serious problem or that the problem is being resolved. Acknowledged alarms take a lower priority than unacknowledged alarms.
- alarm file
- The Alarm File defines information used by alarm checks performed on managed properties. This file is loaded by the Agent File.
-
- API
- Application Programming Interface. Examples are alarm API, authenticate API, data API, and so forth.
- Attribute Editor
- A window that provides information about the selected object. In addition, the Attribute Editor in the Sun Management Center software enables you to customize various monitoring criteria for that object. The monitoring criteria are dependent on the type of object. There are Attribute Editors for domains, hosts, modules, and data properties.
- Base-modules.dat file
- This file contains three module entries: mib2-system, agent-stats, and fscan+syslog.
- Bourne shell service
- Essentially an object maintaining a pipe to one or more shell processes to which commands can be directed and the results returned asynchronously.
- check operations
- Provides a mechanism for triggering refresh operations based on some criteria tested by the check operation.
- community
- A string similar to a password that is used to authenticate access to an agent's monitored data.
- complex alarm
- A complex alarm is based on a set of conditions becoming true. Unlike simple alarms, you cannot set thresholds for complex alarms. See also simple alarm.
- console window
- A graphical user interface component of Sun Management Center software based on Java technology that is used to view monitored hosts (and managed objects) information and status and to interact with Sun Management Center agents.
- DAQ
- Data aquisition.
- data cascade
- The dissemination of a buffer of data into a tree of managed objects and managed properties is known as the data cascade.
- derived nodes
- Derived nodes establish dependency relationships with the nodes on which they rely through the use of the refresh triggers specification.
- digitalFilter
- This function provides a multiply and accumulate function to provide digital filtering capabilities.
- discovery
- A Sun Management Center tool available from the main console window that is used to find hosts, routers, networks, and Simple Network Management Protocol (SNMP) devices that can be reached from the Sun Management Center server.
- domain
- An arbitrary collection of hosts and networks that are monitored by the software as a single hierarchal entity. Users may choose to divide their enterprise into several domains, each to be managed by different users.
- dynamic loadable modules
- A Sun Management Center agent module that can be loaded or unloaded at runtime, enabling monitored properties to be displayed on the main console window without having to restart the console or agent.
- event
- An occurrence that triggers a change in the state of a managed object.
- enterprise module parameter
- The enterprise module parameter is used to specify the OIDs file in which the location of the module is defined.
- getFilter
- The getFilter qualifier specifies a Tcl command or procedure that is used to convert the data from how it is stored (in the data slice) to how it is returned after a 'get' operation. To function properly, the type of the object needs to match the type of the output of the getFilter.
- file scanning
- The act of scanning a file (usually a log file) for certain patterns (regular expressions) that may be indicative of problems or significant information. Sun Management Center agents use file scanning to assist in the monitoring of systems and applications when these components do not provide direct access to status information.
- filter file
- These filters are used to extract the pertinent information from the raw results of data acquisition commands.
- fileFilter
- The filter file defines data filters implemented with Tcl/TOE procedures. These filters are used to extract the pertinent information from the raw results of data acquisition commands.
- hardware modules
- These modules mamage hardware for the host on which the agent is running. For example boards, SIMMs, and so on.
- hierarchy view
- A window view that defines objects in a hierarchy or tree relationship to one another. Objects are grouped depending on the rank of the object in the hierarchy.
- initHoldoff
- This qualifier specifies the time, in time specification, to wait before running the refresh command for the first time.
- initInterval
- This qualifier specifies, in time specification, the time window within which the node should run the refresh command for the first time after the module initializes.
- instance
- A single word or alpha-character string that is used internally within the Sun Management Center agent to identify uniquely a particular module or a row within a module.
- internal service
- The internal service should be specified when the refresh command is a Tcl/TOE command or procedure to be executed in the current node's context.
- localization/internationalization
- Sun Management Center consoles and associated GUI clients operate in a global environment. To do this, a mechanism is required to isolate the language dependent code/information from the language independent code and provide a straightforward method for graphical developers to reference the language dependent information.
- managed entities
- The physical and logical components of a system that are being managed. For example disks, boards, hosts and networks.
- managed object table primitive
- This branch primitive is used in conjunction with the MANAGED-OBJECT-TABLE-ENTRY primitive when constructing a managed object with a table of managed properties
- manage
- In Sun Management Center software, manage is defined as being able to monitor, as well as manipulate an object. For example, management privileges include acknowledging and closing alarms, loading and unloading modules, changing alarm thresholds, and so on. Management privileges are similar to read, write, and execute access.
- managed object classes
- Building blocks used to model managed entities.
- mandatory parameters
- All modules must specify the standard set of parameters.
- managed object primitive
- A primitive used by managed object nodes that are branch nodes in the object tree.
- managed property classes
- These classes are used to group together related managed properties of one managed object .
- managed property class
- This primitive is used to group related managed properties of a managed object together.
- MEL
- pg 396
- MIB
- Management Information Base. A MIB is a hierarchical database schema describing the data available from an agent. The MIB is used by Sun Management Center agents to store monitored data that can be accessed remotely.
- MIB node service
- This type of service should be used when the refresh command is to be executed in the context of another MIB node.
- model file
- Defines the building blocks used to monitor an entity to be managed.
- module
- A software component that can be loaded dynamically to monitor data resources of systems, applications and network devices.
- monitor
- In Sun Management Center software, monitor is defined as being able to observe an object, view alarms and properties. Monitoring privileges are similar to read-only access.
- nested managed object
- This managed object contains other managed objects.
- node
- A node is a workstation or server.
- object
- A particular resource (computer host, network interface, software process, and so on), which is subject to monitoring or management by Sun Management Center software. A managed object is one that you can manipulate. For example, you can acknowledge and turn off an alarm condition for an object that you can manage. A monitored object is one that you can observe but not acknowledge or otherwise manage.
- object manager primitive
- This primitive is used to identify the start of a subtree in the hierarchy where the contents of the subtree may change and must be discovered dynamically.
- operating system modules
- These modules manage operating system entities for the host on which the agent is running. For example swap, cpu usage, and so on.
- optional parameters
- These additional parameters are specified in the module's Parameter File to facilitate user input for the requisite information when the module is loaded.
- pctFilter
- This function computes the value of a named managed property as a percentage of another managed property.
- passive nodes
- Nodes that do not actively collect data but instead have data cascaded into them.
- Parameter File
- Specifies the parameters which the module requires when it is loaded by the agent.
- Prevalidate Actions
- The purpose of prevalidate actions is to ensure that the value can be set into the node
- postrowActions
- These actions are triggered to execute after the set but before the postvalidate actions.
- Postvalidate Actions
- Post-validate actions can be specified to validate the set value.
- procedure file
- Objects in the MIB tree may need to perform special data acquisition functions or alarm status actions.This provides a simple mechanism to override or extend the functionality of the core MIB object primitives.
- rCompareRule
- This rule performs numeric comparisons, regular expression checks, or string comparisons.
- rateFilter
- This function accepts the name of a managed property and returns the rate of change per second for the managed property since the previous sample.
- reference node
- Reference nodes are objects that are loaded for use as a template in the model file.
- refreshFilter
- The refreshFilter qualifier specifies a Tcl command or procedure that is used to process the data acquired by the refresh command.
- refreshMode Qualifier
- The refreshMode qualifier specifies the execution mode of the refresh command.
- refresh operation
- The refresh operation consists of performing DAQ and disseminating the acquired data into the appropriate managed property nodes.
- refreshParams
- The refreshParams qualifier can be used to specify arguments to be passed to the refresh command.
- refresh service
- A refresh service is an object within the agent that can be used for the purposes of data acquisition.
- refreshTrigger
- Derived nodes establish dependency relationships with one or more nodes on which they rely on through the use of the refresh triggers specification.
- remote modules
- Capable of managing entities on remote hosts. For example Oracle, Sybase, and so on.
- remote server context
- A remote server context refers to a collection of Sun Management Center agents and a particular server layer with which the remote agents are associated.
- request caching
- The Sun Management Center server consolidates duplicate outstanding requests originating from multiple consoles and eliminates the execution of redundant requests.
- rollbackActions
- The purpose of rollback actions is to restore the state of the object after the failed set.
- RMI
- Remote Method Invocation.
-
- rule
- A rule is an alarm check mechanism that allows for complex or special purpose logic in determining the status of a monitored host or node.
- seed
- The password for the Sun Management Center user group called esmaster. The seed is an alpha-numeric string of up to 8 characters. (This is not necessarily a UNIX password.) You can select your own seed, or accept the default seed (maplesyr) provided by the Sun Management Center software. If you select your own seed, be sure to record it for later reference.
- shadow MIB
- supports SNMP access to attributes associated with the managed objects and properties in the agent MIB
- superior service
- The superior service should be specified when the refresh command is a Tcl/TOE command or procedure to be executed in the context of the current node's superior in the tree hierarchy.
- server
- The collection of programs and processes (SNMP-based trap, event, topology, configuration, and Java server) that work on behalf of a Sun Management Center user to help manage a particular set of networks, hosts and devices. Usually sends requests to Sun Management Center agents, accepts collected data from them, and passes the data to the main console window for display.
- server context
- See "remote server context."
- setActions
- The setActions specification defines one or more actions to execute when the value of the object is set via SNMP.
- simple alarm
- Simple alarms are based on one condition becoming true. You may set alarm thresholds for simple alarms.
- SNMP
- Simple Network Management Protocol. A complex protocol designed to allow networked entities (hosts, routers, and so on) to exchange monitoring information.
- SNMP Service
- The SNMP service should be specified when the refresh command is an SNMP get request for acquiring data from another SNMP agent.
- SNMPv2 usec
- SNMP version 2, user-based security model security standards.
- Sun Management Center superuser
- Sun Management Center superuser is a valid user on a server host. The superuser decides what the agents are in the context of the server. By default, the superuser password is used as a seed for security key generation.
- Sun Management Center user
- Sun Management Center users are the members of the symon group in the
/etc/group file.
- tableRateFilter
- This function is similar to rateFilter function, except that it operates on a list of data instead of a scalar.
- Tcl
- Tool Command Language.
- testcallback
- This is a reserved word. This is encountered in the context of the TCL triggerCommandorMethod command.
- Time
- A time specification format that permits the entry of complex time specifications, including time windows, specific points in time, and time intervals.
- timeoutInterval
- If the refresh command does not complete within the specified time out interval, then the command will be aborted.
- transposeFilter
- A useful data filter is the transposeFilter, which can be used to transpose a table of data
- TOE
- Tcl Object Extension.
- tooltip
- Proxy monitoring.
- topology view
- The topology view displays the members of the object selected in the hierarchy view.
- transposeFilter
- TransposeFilter can be used to transpose a table of data.
- updateFilter
- The update filter specifies a Tcl command or procedure that is used to process the data being cascaded into the passive node.
- URL
- Uniform Resource Locator. A URL is a textual specification describing a resource which is network-accessible.
- userFilter
- Loops through each line to determine the console user and count the number of unique users and sessions.
- .x file
- A Sun Management Center file used to represent TOE objects.
Copyright © 2000 Sun Microsystems, Inc. All Rights Reserved.