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Online AZ Migration

1 post · Jul 2026

What this trail covers

SingleStore's third generation cluster architecture introduces a zero-copy data fabric that allows compute clusters to attach to any database without data duplication. This enables direct support for Apache Iceberg, facilitating agentic applications by allowing read, write, and reasoning operations on open data formats. Features like Smart Read Replicas, Database Branching, and Smart DR leverage this fabric for independent scaling, rapid environment creation, and efficient disaster recovery, all

All SingleStore trails
  1. Scaling Database Availability Without DisruptioThis post details SingleStore's Online AZ Migration capability, which allows reconfiguring a running deployment between single-AZ and multi-AZ operation without taking applications offline. It explains how this is achieved through distributed SQL, where ownership is distributed across partitions rather than individual servers. The post contrasts this with traditional databases that require disruptive migrations. It highlights leaf fanout failover at the partition level and describes the process of provisioning new nodes, redistributing partitions, and updating placement policies online. The benefit for enterprise customers is the ability to evolve availability requirements without costly and risky migration projects.
  2. Open Intelligence, Open Data: SingleStore delivers Zero-copy Compute on Apache IcebergIntroduces SingleStore's third generation cluster architecture featuring a zero-copy data fabric with direct support for Apache Iceberg. This enables agentic applications to read, write, and reason on data without duplication. New features include Smart Read Replicas for independent scaling of workloads, Database Branching for creating isolated test environments without data duplication, and Smart DR for optimized disaster recovery using the zero-copy fabric.