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1-10 User’s Guide
Figure 1-5. Example of a 4-Node N-Way Migration Solution
Table 1-5 provides an overview of the failover types implemented with Datacenter
Server.
Table 1-5. Failover Configurations
Failover
Type
Description Advantage Disadvantage
N + 1 One server provides
backup for multiple
servers in the cluster
High resource avail-
ability
Backup cluster
node may lack the
resources to
support multiple
cluster node
failures
Multiway Running applications
migrate to multiple
nodes in the cluster
Application load
balancing
Must ensure that
the failover cluster
nodes have ample
resources available
to handle the addi-
tional workload
Cascading Running applications
migrate to the next
pre-assigned cluster
node
Higher availability The cluster node
next in line for
failover may not
have ample
resources available
to handle the addi-
tional workload of
the failed node
N-Way
migration
Any running applica-
tion(s) are manually
migrated to any node
in the cluster
Added flexibility
and adjustable
resource
allocation
Solution is not
automatic
cluster
node 1
cluster
node 2
cluster
node 3
cluster
node 4
Application A