Dell DX6000 Application Manual page 79

Castor-System-Cluster enables an object that is replicated to a disaster recovery cluster to
always be traced back to its cluster of origin in the event of a disaster. This is particularly important
in scenarios where multiple satellite clusters are replicated to a centralized disaster recovery cluster.
The cluster name is specified for a CSN-managed cluster by CSN in the cluster's PXE configuration.
For a non-CSN-managed cluster, the cluster name is specified by the value of the cluster
parameter in your cluster or node configuration file.
Dell recommends you set your cluster name to a fully qualified domain name. For more information,
see the chapter on advanced configuration in the DX Object Storage Administration Guide.
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Version 5.0
December 2010