Master and Replica caches can be arranged in two basic deployments: master-region or combination-region.

The master-region deployment may be used to keep all Master caches in a single region. This arrangement is effective when a single application is using WAN replication, or when the Replica region is used as the backup location for disaster recovery.

The figure below shows Caches A, B, and C mastered in Region 1. Regions 2 and 3 are replicas of all caches.

The combination-region deployment may be used when Master caches are not confined to a particular region. This arrangement is effective for geographically distributed applications that concurrently use BigMemory data, with each Master cache located in the region where its application is most active.

The Orchestrator can manage non-overlapping Master and Replica caches at the same time. This means that one region may be mastering one set of caches while replicating another set of caches.

The figure below shows Cache A mastered in Region 1, and Caches B and C mastered in Region 2. Region 3 is a replica of all caches.