Quick Answer
Multi-region writes with minimal conflict: use a primary-primary setup via Patroni + BDR (Bi-Directional Replication) or Citus. Shard data by region so each region owns its data (fewer cross-region conflicts). Use conflict resolution rules (last-write-wins or application-defined). Accept higher latency for cross-region transactions. CockroachDB and YugabyteDB are PostgreSQL-compatible alternatives built for this.
Answer
Design uses logical replication with conflict-free partitioning where each region owns a separate writable key range. Use region-prefixed keys or GUID variants to avoid collisions. Tools like BDR support conflict handlers for true multi-master write safety.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
