Hitachi Global Link Manager Software Installation and Configuration Guide

Global Link Manager Cluster System Configuration
The management server for Hitachi Command Suite products supports active-
standby failover in clusters. In a cluster, the server system executing system
operations is called the primary node. The server system that is on standby
to take over operations if a failure occurs in the executing system is called
the secondary node. If a failure occurs, failover clustering switches servers
from the primary node to the secondary node to continue operation. High
availability is thus assured because a failure will not interrupt operation.
The following figure illustrates the concept of the management server in a
cluster configuration.
Figure 4-1 Concept of Cluster Configuration
The software programs controlling the entire cluster system are called cluster
software. Cluster software monitors the system to make sure that the system
is operating properly, and performs a failover to prevent an interruption to
operations if the software detects an abnormal condition.
4-2
Installing Global Link Manager Clusters
Hitachi Global Link Manager Installation and Configuration Guide (Web Version)