Restate is a durable execution platform designed to address complex distributed system challenges when building stateful, fault-tolerant applications. It logs every step via execution journaling, ensuring fault-tolerance, reliable recovery and exactly-once communication across services. The platform’s key architectural advantage lies in separating application logic into three durable service types: Basic Services for stateless functions; Virtual Objects to model concurrent, stateful entities; and Workflows to orchestrate complex, multi-step processes. We’ve been carefully assessing Restate in a large insurance system and are quite happy with its performance so far.
Restate 是一个持久化执行平台，类似于 Temporal ，由 Apache Flink 的原始创始人开发。功能方面，它提供了将工作流作为代码、状态事件处理、Saga 模式和持久化状态机等特性。Restate 使用 Rust 编写，并作为单个二进制文件部署，利用分布式日志记录事件，并通过基于 Flexible Paxos 的虚拟共识算法来实现，这保证了在节点故障时的持久性。平台提供了 Java、Go、Rust 和 TypeScript 等常见语言的 SDK。我们仍然认为，在分布式系统中最好避免使用分布式事务，因为这会带来额外的复杂性和不可避免的运维开销。然而，如果在你的环境中无法避免分布式事务，这个平台是值得评估的。
