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Advantage:
• High resource availability to users.
Disadvantage:
• The cluster node next in line for failover may not have ample resources available
to handle the additional workload of the failed node.
Figure 1-4 shows an example of cascading failover configuration.
Figure 1-4. Example of a 4-Node Cascading Failover
N-Way Migration
N-Way migration is the ability to manually migrate an application from one node to any
node in the cluster (based on cluster node resource availability). This type of solution
provides the following features:
Advantages:
• Adjustable resource allocation.
• Added flexibility.
Disadvantage:
• Solution is not automatic.
Figure 1-5 shows an example of an N- Way migration solution.
cluster
node 3
cluster
node 4
failed cluster
node 1
cluster
node 2
applications