The image illustrates a regional architecture for Oracle Database using Global Data Services (GDS) with Oracle True Cache integration. At the top, a UCP JDBC connection pool handles application connections. Frequent read operations are directed from the pool to two True Cache nodes (True Cache 1 and True Cache 2) via Global Service Managers (GSMs) in the Global Data Services layer. Writes and infrequent reads are routed directly from the pool (through GSMs) to the primary database.The Oracle Notification Service (ONS) Network also interfaces with GSMs and the GDS Catalog, which stores metadata for global services.In the GDS pool labeled SALES, two services ('SALES' and 'SALES_TC') are managed. True Cache nodes handle frequent read requests, reducing load on the primary database. On a cache miss or during cache warm-up, True Cache nodes retrieve data from the primary database. Redo data from the primary is periodically applied to the caches to keep them current. All components are visually interconnected with directional arrows indicating the flow of reads, writes, cache access, ONS notifications, and data synchronization..