Principle:Ray project Ray Actor Runtime Initialization
| Knowledge Sources | |
|---|---|
| Domains | Distributed_Computing, Actor_Model |
| Last Updated | 2026-02-13 17:00 GMT |
Overview
A runtime initialization mechanism that bootstraps the distributed actor system, enabling creation and management of stateful remote actors.
Description
Before any actor can be created or invoked, the Ray runtime must be initialized. In the actor lifecycle context, initialization not only establishes the connection to the cluster scheduler but also enables the actor management subsystem — including the Global Control Store (GCS) for actor registration, named actor lookup, and actor lifecycle tracking (restart policies, detached actors).
This is the same underlying Ray.init() call as for task execution, but in the actor context it is a prerequisite for actor creation, method invocation, actor naming, and actor termination operations.
Usage
Initialize the runtime before any actor operations. This is mandatory — attempting to create actors or retrieve named actors without initialization will throw an IllegalStateException.
Theoretical Basis
The actor model requires a supervisor system that tracks actor processes across the cluster. Runtime initialization bootstraps this supervisor by:
- Connecting to the GCS (actor registry)
- Starting worker process pools that can host actors
- Enabling the Raylet to schedule actor creation tasks