You can use a campus cluster for the primary cluster and a secondary cluster for disaster recovery, which creates a three-site or three–data–center (3DC) configuration of primary, backup, and disaster recovery sites.
There are two ways to perform 3DC replication:
Use volume-manager mirroring or ZFS pool-level mirroring within the campus cluster. Use application-based replication, such as Oracle Data Guard, MySQL, or ZFS snapshots software replication, to the disaster recovery site.
Use synchronous storage-based replication within the campus cluster . Use application-based replication, such as Oracle Data Guard, MySQL, or ZFS snapshots software to replicate the application from the campus cluster to a disaster recovery site.
You cannot create a daisy chain of disaster recovery framework pairs (for example, London-Paris-Rome) for the same managed application.