Synchronous long-distance Remote Copy configuration

A synchronous long distance (SLD) Remote Copy configuration is composed of three systems: two systems in a synchronous Remote Copy configuration and the two synchronous systems in an asynchronous periodic relationship with the third system.

In an SLD configuration, Remote Copy volume groups from the primary system are replicated to the two separate target systems simultaneously. Data replicates to one target in synchronous mode and to the second in asynchronous periodic mode. The target systems must each have appropriate network connections to the source systems to support the replication mode being used.

Any or all storage systems in an SLD configuration can be two-node or four-node systems.

While it is not a requirement, Hewlett Packard Enterprise recommends that an SLD Remote Copy is configured:

• In synchronous mode between the primary system and the closer of the two secondary systems. The chosen systems must be within supported network latency limitations for synchronous Remote Copy.

• In asynchronous periodic mode between the primary system and the secondary system that is physically farther apart (and therefore likely to share a lesser connection).

SLD Remote Copy