Three data center Peer Persistence configuration
Three data center Peer Persistence (3DC PP) is a combination of a high-availability Remote Copy configuration (Peer Persistence) and a synchronous long distance configuration (SLD). A 3DC PP configuration enables synchronous replication over a metro distance and asynchronous periodic replication over a continental distance providing disaster tolerance. You can run separate non-Peer Persistence SLD Remote Copy groups on the same three storage systems.
Remote Copy links for 3DC PP can be all RCIP, all RCFC, or a mixture of each. See the HPE Primera Support Matrix for supported configurations.
The communication links and targets for the three systems are set up like an SLD configuration.
The synchronous targets on the primary and secondary systems are configured as a 1-to-1 Peer Persistence.
The asynchronous periodic targets to the tertiary location are configured for periodic replication.
The Quorum Witness application is deployed at a separate location or the tertiary location on a separate host or host cluster.
The Quorum Witness is configured for use by the Peer Persistence storage systems.
Automatic failovers only occur to the secondary system using the same criteria as standard 1-to-1 Peer Persistence configurations.
