Failover By DNS, IP or Host Name
Failover is the process specifically associated to cluster systems.
Typically it means when the Primary station of a cluster system fails, the
Secondary station will be activated to take over the active duty of the Primary
station.
ClusterReplica Enterprise monitors the Primary station in the cluster system
and the pre-defined services listed in the data replication configuration panel
to determine if the cluster system is in the situation that a Failover is
required.
When the two systems to be clustered are in two different network segment,
the common configuration of local host table or IP address for clustering
failover may not work because neither the cluster name nor the cluster IP can be
used for public connection in a different network segment. In this situation,
DNS setup is employed to overcome the difficulty.
ClusterReplica Enterprise updates IP in the DNS server configuration to
have it always point to the Primary server in the ClusterReplica Structure in
normal or failover situation.
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