Figure. Three datacentre multi-target
Three datacentre (3DC) multi-target using Global-Active Device, TrueCopy and Universal Replicator provides the same level of data protection, equivalent to 3DC cascade, but improves upon it by solving the issue of local secondary site failure leaving the primary site unprotected. If the local secondary site fails, replication between the primary and remote secondary site can continue uninterrupted.
3DC multi-target may also be configured using Universal Replicator instead of TrueCopy. Symmetric configuration and operation simplifies component failure and site failure since both are handled with a single set of operations. Consider this option if simplicity of operation is the first priority.