Distributed Restate - A first look

Restate is a distributed system designed for high availability, durability, and scalability, offering a robust runtime for executing, messaging, and orchestrating operations across multiple regions. Unlike traditional systems, Restate is built from the ground up as a distributed architecture, utilizing a log-first approach where appends to the log are synchronously replicated to ensure data durability and consistency. This system effectively manages failover and leader transitions without relying on external databases, which simplifies its operation and enhances performance. Restate is capable of handling complex scenarios, such as geo-distributed deployments, maintaining strong consistency and exactly-once state while reducing latency issues typically faced in multi-region setups. The architecture integrates tightly between the log and processor, using a push model for service invocations to streamline failover processes. The upcoming release promises to focus on correctness and reliability, with detailed insights into the system's design and operation to follow.