Dell Compellent Series 30 - Manual (Page 40)

32 Storage Center 5.5 System Manager User Guide
Servers
Server Clusters
A server cluster is a collection of servers. A server that is a member of a server cluster is
referred to as a cluster node. Volumes can be mapped directly to a server cluster. All
volumes mapped to a server cluster are automatically mapped to all nodes in the cluster.
This increases IO efficiency and, if one server fails, IO continues to other servers within the
cluster. Volumes can also be mapped to only one of the nodes within the server cluster.
Some operating systems require that a volume mapped to multiple cluster nodes use the
same LUN on each node. When creating a server cluster, Storage Center attempts to map
an included volume to the same LUN on all cluster servers. If the LUN selected is not
available on a particular server, the mapping is not performed and the volume is only
partially connected to the cluster.
Note All servers within a server cluster must have the same operating system.
Creating a Server Cluster
1 In the system tree, select the servers node.
2 From the shortcut menu, select Create Server Cluster.
Figure 20. Create Sever Cluster Wizard
3 Choose one of the buttons at the bottom of the window and follow the instructions in the
wizards.