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Ray Tutorial Builds an End-to-End AI Pipeline

AI summary

A Juejin AI tutorial presents a runnable mini-ray example spanning data preparation, batch inference, training, online serving, observability, and fault-tolerance exercises. The article says the code requires only Python and NumPy without a GPU, then maps its components to production Ray libraries including Ray Data, Ray Train, Ray Serve, Ray Tune, and KubeRay; no independent runtime verification is provided.

In-depth insight

The tutorial consolidates Ray’s core distributed-computing primitives into a single AI engineering workflow and identifies the production libraries that correspond to each stage.

仓库地址:github.com/hhk-png/cyc…

把整本书的能力拼成一条真实流水线:数据准备 → 批量推理 → 训练 → 在线服务 → 可观测性 → 容错。 配套代码 mini-ray/examples/11_end_to_end.py,可以直接运行(纯 Python + NumPy,无需 GPU)。 每一节都给出「真实 Ray 里对应哪个组件」,所以这份案例可以直接迁移到生产栈。


E.1 案例全景

 ① 数据准备        4 个分片 → 清洗/特征化(任务链,依赖自动并行)
      │
 ② 批量推理        ActorPool + 常驻模型(模型只加载一次)
      │
 ③ 训练            放置组 + 参数服务器 + 数据并行 worker(资源原子性预留)
      │
 ④ 在线服务        有状态推理端点(真实场景 = Ray Serve)
      │
 ⑤ 可观测性        State API + timeline 甘特图
      │
 ⑥ 容错演练        注入 worker 崩溃 + 丢弃全部对象,验证重试与 lineage 重建
阶段真实 Ray 对应本文用到的 Ray Core API
① 数据准备Ray Data(read_* + map_batches)@ray.remote、ObjectRef 依赖
② 批量推理Ray Data LLM:vLLMEngineProcessorConfig + build_processorutil.ActorPool、actor 常驻
③ 训练Ray Train(+ Ray Tune 调参)放置组、PlacementGroupSchedulingStrategy
④ 在线服务Ray Serve / Ray Serve LLMactor 方法调用
⑤ 可观测性ray.util.state + Dashboard + ray.timeline(⚠️ 真实 Ray 的 timeline(filename) 不接受 html=,见 E.6)state.*、timeline()、timeline(..., html=)(后者是 mini-ray 专有)
⑥ 容错同样的机制(重试 / lineage 重建 / actor 重启)max_retries、故障注入

#Ray#mini-ray#Ray Data#Ray Train#Ray Serve#Ray Tune#KubeRay#NumPy

Original · 18 min readRead the original
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