Figure 1-5. Example Of A 4-Node N-Way Migration Solution - Dell PowerEdge Cluster FE100 User Manual

1-10 User's Guide
cluster
node 1
cluster
node 3

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 Description
Type
N + 1 One server provides
backup for multiple
servers in the cluster
Multiway Running applications
migrate to multiple
nodes in the cluster
Cascading Running applications
migrate to the next
pre-assigned cluster
node
N-Way Any running applica-
migration tion(s) are manually
migrated to any node
in the cluster
cluster
node 2
Application A
cluster
node 4
Advantage
High resource avail-
ability
Application load
balancing
Higher availability
Added flexibility
and adjustable
resource
allocation
Disadvantage
Backup cluster
node may lack the
resources to
support multiple
cluster node
failures
Must ensure that
the failover cluster
nodes have ample
resources available
to handle the addi-
tional workload
The cluster node
next in line for
failover may not
have ample
resources available
to handle the addi-
tional workload of
the failed node
Solution is not
automatic