Cross Data Center Replication (XDCR) in Couchbase Server 7.0 enhances database high availability, disaster recovery, and geo-locality by introducing support for Scopes and Collections, allowing for more precise data replication in multi-tenant applications and microservices. XDCR now offers implicit and explicit mappings to manage replication between source and target collections within database buckets, enabling both dynamic and programmatic replication strategies. The system introduces a main pipeline for continuous replication and a backfill pipeline to address previously missed data, improving data integrity and flexibility without requiring a restart from sequence 0. This advancement significantly broadens the use cases for XDCR, meeting evolving customer needs by providing granular control over data replication and the ability to adjust mapping rules in real-time.