Configuring Remote Replication

Synchronous remote replication ensures data consistency between the primary resource and secondary resource of each remote replication pair. Asynchronous remote replication quickly responds to service requests of hosts and implements long-distance disaster recovery. Before configuring remote replication, you must understand the whole configuration process. Then, configure parameters related to remote replication.

• Creating a Replication Cluster
  Creating a replication cluster includes creating a replication control cluster and a replication service cluster, configuring the replication network, and authenticating the replication cluster. You must create a replication cluster in both primary and secondary storage systems.
• Adding a Remote Device
  This operation enables you to establish a logical connection between a local device and a remote device for data transmission.
• Creating a Remote Replication Pair
  Creating a replication pair between the local and remote directories enables data in the local directory to be backed up to the remote cluster. When a disaster occurs, you can use the remote backup data to reconstruct data on the local end. Alternatively, you can directly take over services from the remote end to minimize data loss and shorten service interruption time.
• Creating a Remote Replication Consistency Group
  In medium- and large-sized database applications, data, logs, and change records are stored in associated volumes of storage systems. If data of one volume is lost, data in other volumes becomes invalid. To ensure data availability, you can add remote replication pairs of these volumes to the same consistency group.