How to Configure Bidirectional Transactional Replication in SQL Server

Bidirectional transactional replication in SQL Server allows two databases to publish and subscribe to each other’s changes, supporting active-active workloads, regional distribution, load balancing, and disaster recovery. Unlike Enterprise-only peer-to-peer replication, bidirectional transactional replication is available in Standard Edition and above but requires manual planning for loop prevention, conflict management, synchronized schemas, primary keys, identity ranges, server naming, network access, and SQL Server Agent permissions. Native configuration requires each server to act as publisher and distributor, use matching publications and articles, enable loopback detection, initialize subscriptions, and continuously monitor latency, synchronization health, and data integrity through Replication Monitor and reconciliation checks. The material also presents CData Sync as an alternative that uses two independent change-based jobs, centralized monitoring, incremental tracking through Change Tracking or Change Data Capture, and optional transformations to simplify large-scale or heterogeneous replication. Common operational risks include agent failures, permissions problems, connectivity issues, schema mismatches, identity conflicts, and data conflicts, making testing, documented recovery procedures, and ongoing governance important.

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