Motorola 6806800C44B 用户手册
Service Structure Overview
Introduction
Availability Service Programmer’s Reference (6806800C44B)
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Availability Agent
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Cluster Membership Agent
1.2.1.1
Availability Manager
NetPlane Core Services’ Availability Manager (AvM) maintains the hardware model of the
system above. It acts as a bridge between the Availability Management Framework (AMF) and
the Hardware Platform Interface (HPI). It supports activation and deactivation of field-
replaceable units (FRUs), Reset Management, Lock Management, and Fault Management.
AvM interacts with internal role distribution and fault management mechanisms to capture the
role of system manager hosts and propagate it to the AMF. It is also used to trigger
administrative switchovers of system manager hosts. AvM resides on both the active and
standby system manager hosts.
system above. It acts as a bridge between the Availability Management Framework (AMF) and
the Hardware Platform Interface (HPI). It supports activation and deactivation of field-
replaceable units (FRUs), Reset Management, Lock Management, and Fault Management.
AvM interacts with internal role distribution and fault management mechanisms to capture the
role of system manager hosts and propagate it to the AMF. It is also used to trigger
administrative switchovers of system manager hosts. AvM resides on both the active and
standby system manager hosts.
1.2.1.2
Availability Director
The Availability Director (AvD) maintains the entire system model, consisting of nodes, the
Service Groups (SG), their constituent Service Units (SUs), their constituent components, and
their corresponding component service instance (CSI) and service instances (SIs) that are in
the system. There is an active and a standby instance of the AvD in a system. The AvD runs as
part of a System Construction and Availability Process (SCAP) on the system manager host.
Service Groups (SG), their constituent Service Units (SUs), their constituent components, and
their corresponding component service instance (CSI) and service instances (SIs) that are in
the system. There is an active and a standby instance of the AvD in a system. The AvD runs as
part of a System Construction and Availability Process (SCAP) on the system manager host.
Its main tasks include fault detection, isolation and recovery procedures as defined in the SAF
AMF. Any problems and failures on a component that cannot be handled locally, are prompted
to the Availability Director which controls and triggers the isolation of the affected component
and, if possible, the activation of a stand-by component.
AMF. Any problems and failures on a component that cannot be handled locally, are prompted
to the Availability Director which controls and triggers the isolation of the affected component
and, if possible, the activation of a stand-by component.
Figure 1-1
Availability Service - Subparts