Set Up Service Instances Across a Wide Area Network (WAN)

Two service instances may form a single distributed system across a WAN. The interaction of the two service instances may follow one of the patterns described in the section on Design Patterns.

Call the two service instances A and B. The VMware Tanzu GemFire cluster within each service instance uses an identifier called a distributed_system_id. This example assigns distributed_system_id = 1 to cluster A and distributed_system_id = 2 to cluster B. VMware Tanzu GemFire gateway senders provide the communication path and construct that propagates region operations from one cluster to another. On the receiving end are VMware Tanzu GemFire gateway receivers. Creating a service instance also creates gateway receivers.

The procedures in this section assume that service instances communicate using TLS encryption.

Note: To set up more than two service instances across a WAN, set up the interaction between the first two service instances A and B following the directions in either Set Up a Bidirectional System or Set Up a Unidirectional System, as appropriate. After that, set up the interaction between service instance A and another service instance (called C) following the directions in either Set Up an Additional Bidirectional Interaction or Set Up an Additional Unidirectional Interaction, as appropriate.