During Developer Week 2025, Cloudflare launched beta global read replication for its D1 serverless SQL database. This feature enables faster read queries across a globally distributed system without compromising sequential consistency. By automatically provisioning replicas in multiple regions, D1 intelligently routes requests based on performance heuristics and query needs. The implementation hinges on database sessions, ensuring all queries from a session maintain sequential consistency, even when routed to different replicas. This architecture aims to reduce latency and increase throughput by offloading read queries from the main database.
D1âs read replication feature is built around the concept of database sessions, ensuring sequential consistency for all queries in the session.
With automatically provisioned replicas in every region, applications can now serve read queries faster while maintaining strong sequential consistency across requests.
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