HP StorageWorks EVA Cluster Extension Software Administrator Guide (T3667-96045, April 2010)

Figure 2 One-to-one configuration
.
Consolidated DR site configuration
EVA Cluster Extension supports configurations that have a single EVA storage system in the disaster
recovery data center and up to two source EVA storage systems (the logical configuration must be a
one-to-one configuration as shown in Figure 2 on page 18).
NOTE:
The restrictions outlined in “One-to-one configuration” on page 17 also apply to consolidated
configurations.
When setting up a consolidated DR site configuration (see Figure 3 on page 19), consider the following:
• EVA Cluster Extension uses the unit of DR groups as the failover unit. This means all vdisks or
members of a DR group will be failed over if the cluster software moves disk access from one
cluster node to another.
• EVA Cluster Extension does not directly support managed sets. However, applications that consist
of more than one DR group in one or more EVA storage systems can be supported by Continuous
Access EVA as managed sets.
• If necessary, you can configure managed sets by creating EVA Cluster Extension resources that
include the DR groups included in the managed set and configuring them in the same application
service group (cluster group).
EVA Cluster Extension features18