Dell AX4-5 - Manual (Page 50)

50
Understanding Your Failover Cluster
If you have applications that run well on two-node cluster, and you want to
migrate these applications to Windows Server 2008, failover pair is a good
policy. This solution is easy to plan and administer, and applications that do
not run well on the same server can easily be moved into separate failover
pairs. However, in a failover pair, applications on the pair cannot tolerate two
node failures.
Figure 4-2 shows an example of a failover pair configuration. Table 4-6
provides a failover configuration for the cluster shown in Figure 4-2.
Figure 4-2. Example of a Failover Pair Configuration
Multiway Failover
Multiway failover is an active/active policy where running applications from a
failed node migrate to multiple nodes in the cluster. This solution provides
automatic failover and load-balancing. Ensure that the failover nodes have
sufficient resources to handle the workload. Figure 4-3 shows an example of
four-node multiway failover configuration.
Table 4-6. Example of a Failover Pair Configuration for a Four-Node Cluster
Cluster Resource Group Possible Owners List
App1 1, 2
App2 3, 4
cluster
node 1 cluster
node 2
cluster
node 3 cluster
node 4
application A
application B