In the context of Temporal, a deterministic workflow processing framework, determining the appropriate persistence layer is crucial. PlanetScale, built on top of Vitess, provides a scalable solution for sharding MySQL databases without sacrificing operational complexity. By leveraging horizontal partitioning and VTGate, PlanetScale delivers resiliency, scalability, and performance improvements over a single MySQL instance. The vSchema abstraction layer presents a unified view of the underlying keyspaces and shards, enabling seamless sharding and minimizing disruption to applications. In contrast to other NoSQL bindings for Temporal, PlanetScale's approach reduces potential failure points and increases write and read throughput, making it an attractive option for production environments. By adopting PlanetScale, users can take full advantage of its scalability improvements while maintaining operational simplicity.