OSI/MHS Configuration and Management Manual

Management Environment for OSI/MHS
OSI/MHS Configuration and Management Manual—424827-003
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CLASS Objects
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Find out the attribute values and operational status of the class
CLASS Object Summary States
An OSI/MHS class can go through a sequence of states that depend on and
summarize the states of its subordinate objects. You can use the SCF STATUS
command to inquire about the summary state of a class. Other SCF commands allow
you to change its summary state.
STARTED, for an OSI/MHS class, is the state that allows you to start the subordinate
groups. This state results from directing a START command to the CLASS object.
The STOPPED state, for an OSI/MHS class, means that the class and all its
subordinate groups have been stopped. One way to achieve this effect is to stop the
groups individually, then stop the class. But the class and groups all stop if you include
the option SUB ALL in an ABORT or STOP command directed to the CLASS object.
The class must be in the STOPPED state before you can alter its attributes.
STOPPING is a transitional state; it means that a STOP or ABORT command was
directed at a CLASS object, but not all its GROUP objects have reached the
STOPPED state.
UNDEFINED means that no class with the specified name is defined to the MHS
manager. If you try an SCF operation on an UNDEFINED (nonexistent) class, SCF
returns the error message “object name not found.”
Types of CLASS Objects
OSI/MHS defines five types of CLASS objects. Each has a qualifying class name. In
an SCF command, this qualifier must be included in the full class name to identify the
type of class to which the command applies.
Figure 2-6. CLASS Object Summary States
UNDEFINED
STOPPED
STARTED
ADD
DELETE
START
STOPPING
STOP
or ABORT
STARTING
024VST .VSD
Note: Boxes represent the stable states of a CLASS object; ovals represent
a transition state; and arrows represent the SCF commands that change the
class state.