Motorola 6806800C44B 用户手册
Availability Service Programmer’s Reference (6806800C44B)
Introduction
Compliance Report
16
1.2.1.3
Availability Node Director
The Availability Node Director (AvND) resides on each system node and its main task is to
maintain the node-scoped part of the software system model described above.
maintain the node-scoped part of the software system model described above.
The AvND coordinates local fault identification and repair of components and furthermore
facilitates any wishes it receives from the Availability Director.
facilitates any wishes it receives from the Availability Director.
The AvND watches for components arriving or leaving the system and summarizes this
information in a Service Unit (SU) presence state, and keeps the AvD informed about the
current status and changes. The AvND is capable of disengaging, restarting and destroying any
component within its scope. This may occur according to AvD instructions or as a result of an
administrative action or automatically triggered by policies.
information in a Service Unit (SU) presence state, and keeps the AvD informed about the
current status and changes. The AvND is capable of disengaging, restarting and destroying any
component within its scope. This may occur according to AvD instructions or as a result of an
administrative action or automatically triggered by policies.
1.2.1.4
Availability Agent
The Availability Agent (AvA) is the linkable library that provides a means for the AvSv to
exchange information with system components overseen by the process in which this library is
planted. It does not run as a separate thread.
exchange information with system components overseen by the process in which this library is
planted. It does not run as a separate thread.
The AvA implements the SAF Availability Management Framework API and provides the entry-
point for accessing AMF functionality.
point for accessing AMF functionality.
1.2.1.5
Cluster Membership Agent
The Cluster Membership Agent (CLA) is a linkable library that enables AvSv to provide
information about nodes in the cluster to the process in which it is linked. It does not run as a
separate thread.
information about nodes in the cluster to the process in which it is linked. It does not run as a
separate thread.
The CLA implements the SAF Cluster Membership Service Library functionality and provides
an entry point to the SAF CLM functionality.
an entry point to the SAF CLM functionality.
1.2.2
Compliance Report
Availability Service conforms to the Application Interface specifications mentioned in the
following SAF documents:
following SAF documents:
z
SAI-AIS Volume 1: Overview and Models (SAI-AIS-B.01.01)
z
SAI-AIS Volume 2: Availability Management Framework (SAI-AIS-AMF-B.01.01)
z
SAI-AIS Volume 3: Cluster Membership Service (SAI-AIS-CLM-B.01.01)
Table 1-1 Compliance Table - Availability Service, SAI-AIS Volume 1: Overview and Models
Section
Description
Supported
Notes
1
Document Introduction
NA
Informational
2
Overview of the AIS
NA
Informational
3
Programming Model and Naming
Conventions
Conventions
Yes