Motorola 6806800C08B 사용자 설명서

The following table lists and briefly explains the NCS services that implement the Service 
Availability Forum (SAF) Application Interface Specification (AIS).

Further details about each of these services will be given in the following sections. 

Availability Service 
(AvSv)

Application Management 
Framework (AMF) and 
Cluster Membership 
Service (CLM)

This service provides a standardized means 
to model system components and 
standardized mechanisms for monitoring, 
fault reporting, fault recovery and repair of 
components. It furthermore provides 
functionality that oversees cluster nodes as 
they join and leave the cluster.

Checkpoint Service 
(CPSv)

Checkpoint Service 
(CKPT)

This service oversees the life and integrity of 
entities called checkpoints. Active 
components write to checkpoints so that 
stand-by components recover the last known 
good state while turning active. 

CPSv coordinates the creation and deletion 
of checkpoints and maintains the checkpoint 
inventory within a cluster.  

Message Queue Service 
(MQSv)

Messaging Service 
(MSG)

This service provides a standardized means 
for distributed applications to send messages 
among themselves. MQSv oversees entities 
called queues and queue groups and is 
capable of preserving unread messages if a 
reader process dies. 

Event Distribution Service 
(EDSv)

Event service (EVT)

This service provides a standardized means 
to publish events and to subscribe to events 
anywhere in a cluster. 

Global Lock Service 
(GLSv)

Locking Service (LCK)

This service provides a means to control 
access to a cluster resources by competing 
distributed clients.