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Verify the administrative domain is available in the other cluster if intending to use a storage domain within a cluster other than the one in which it was initially created. To use a storage domain means client requests (read, write, delete) are performed in the cluster. Replication of the administrative domain is unnecessary if the storage domain is replicated to another cluster purely for Disaster Recovery (DR) and client requests are ever sent to it. the The initgateway command must be used in one cluster and then use Replication Feeds to duplicate the administrative domain into all other clusters.
Required permission
Swarm needs to make perform a "GET /" request during replication to check the Swarm cluster name and version when replicating through Gateway.
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The following diagram shows three Swarm storage clusters, storage domains A1 and A2, and an administrative domain A. Domains A, A1, and A2 are all initially created in Cluster Alpha. Remote replication was is then configured to mirror domains A and A1 to Cluster Bravo. Additionally, domains A and A2 are configured to mirror to Cluster Charlie.
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Content is available for reading from all clusters to which it is mirrored and content changes (create, update, or delete) are propagated propagate to the other clusters by mirroring the storage domains. Notice the administrative domain for a storage domain must be mirrored to any cluster where the clients access the storage domain. This is required so the IDSYS, Policy, XFORM, authentication tokens, and other tracking information used to manage the storage domain are available to the Gateways running in the other clusters. Although replication of the administrative domain is not required if clients do not access a storage domain from another cluster, it is recommended to simplify DR if it becomes necessary to restore.
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