Google Cloud announced a new open-source tool that simplifies migrating Cassandra workloads to Spanner. Cassandra, a key-value NoSQL database, is prized for its speed and scalability and is used broadly for applications requiring rapid data retrieval and storage, such as caching, session management, and real-time analytics. However, this simplicity also leads to limitations like poor support for complex queries, potential data redundancy, and difficulty modeling intricate relationships. Spanner, Google Cloud’s always-on, globally consistent, and virtually unlimited-scale database, combines the scalability and availability of NoSQL with the strong consistency and relational model of traditional databases, positioning it for traditional Cassandra workloads. And now, switching from Cassandra to Spanner is easier than ever, with the introduction of the Cassandra to Spanner Proxy Adapter, an open-source tool for plug-and-play migrations of Cassandra workloads to Spanner without changes to the application logic. Yahoo successfully migrated from Cassandra to Spanner, reaping the benefits of improved performance, scalability, consistency, and operational efficiency. The proxy adapter made it easy to migrate. These success stories demonstrate that migrating from Cassandra to Spanner can be a transformative step for businesses seeking to modernize their data infrastructure, unlock new capabilities, and accelerate innovation.