Has anyone performed a high availability catalog across different datacenters?

For instance:

Master [Datacenter1]  --------------> Netapp [Datacenter 1]
                                                  ^^^
                                                  |||||
                                                  vvv
Master [Datacenter2 (standby)] -> Netapp [Datacenter 2]

Where the two netapps are synced via their own protocol for replication?
Has anyone done this or similar methods of catalog replication across
multiple sites?

Thanks,

Justin.